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Voltage Comparator patents

      

This page is updated frequently with new Voltage Comparator-related patent applications.




Date/App# patent app List of recent Voltage Comparator-related patents
07/28/16
20160218729 
 Adc and analog-to-digital converting method patent thumbnailAdc and analog-to-digital converting method
An analog-to-digital converter includes a successive approximation converter, a voltage comparator, and a controller. The successive approximation converter receives an analog input voltage and a first reference voltage, determines the level of a voltage of a first node as a negative level of the analog input voltage, and using a successive approximation method determines an output logic value corresponding to one bit of the n-bit output digital code at every one successive approximation cycle while adjusting the level of the voltage of the first node based on a level of the first reference voltage.
Samsung Display Co., Ltd.


07/28/16
20160216318 
 Circuit for monitoring metal degradation on integrated circuit patent thumbnailCircuit for monitoring metal degradation on integrated circuit
An integrated circuit (ic) having a heat-generating element, such as a power mosfet, a current-carrying conductor coupled to the heat-generating element, a sense conductor adjacent the current-carrying conductor, and a failure-detection circuit coupled to the sense conductor. When thermal cycling of the ic causes the resistance of the sense conductor to become greater than a temperature-dependent threshold value, the failure-detection circuit generates a signal indicating that the integrated circuit will soon fail.
Freescale Semiconductor, Inc.


07/21/16
20160209860 
 Bandgap reference voltage circuit patent thumbnailBandgap reference voltage circuit
A bandgap reference voltage circuit includes a bandgap reference voltage generator and a startup current generator. The bandgap reference voltage generator is configured to generate a first voltage and a second voltage.
Taiwan Semiconductor Manufacturing Company Limited


06/02/16
20160156295 
 Motor drive controller and  detecting rotation state patent thumbnailMotor drive controller and detecting rotation state
A motor drive controller is for controlling a motor having multiple phases and includes: a comparison reference voltage generator that generates a predetermined constant voltage as a comparison reference voltage; a counter-electromotive voltage comparator that compares the comparison reference voltage with a counter-electromotive voltage of each phase of the motor; and a rotation state detector that detects a rotation state of the motor based on positive/negative polarities of counter-electromotive voltages of other phases with respect to the comparison reference voltage at the time of an occurrence of a zero cross between the counter-electromotive voltage of any one phase and the comparison reference voltage.. .
Minebea Co., Ltd.


06/02/16
20160156260 
 Switching regulator and the method thereof patent thumbnailSwitching regulator and the method thereof
A switching regulator uses an over voltage comparator to compare an envelop line signal with a reference wave signal, to detect whether the system is in an over voltage condition. The envelop line signal is indicative of a peak value of an inductor current..
Chengdu Monolithic Power Systems Co., Ltd.


05/12/16
20160134239 
 Class d power driver peripheral patent thumbnailClass d power driver peripheral
A class d peripheral is integrated with a microcontroller as a general purpose driver for providing many different class d power applications such as motor and solenoid control, audio amplification, etc. Use of a simple triangle waveform (saw tooth) oscillator normally used for detecting changes in capacitance values in combination with a voltage comparator provides inexpensive generation of pulse width modulation (pwm) suitable for a wide range of class d power applications.
Microchip Technology Incorporated


05/12/16
20160131708 
 On-chip eye diagram capture patent thumbnailOn-chip eye diagram capture
A system for capturing an eye diagram is disclosed. In various embodiments, the system includes: a delay line arranged to receive a digital signal and output a time delayed version of the digital signal; an edge detection circuit arranged to receive the digital signal and the time delayed version of the digital signal, the edge detection circuit operating to output a signal corresponding to a logical value of the digital signal received coincident with an edge of the time delay version of the digital signal; a voltage comparator arranged to receive the digital signal and a reference voltage, the voltage comparator operating to output a first signal when a voltage of the digital signal and the reference voltage are equal to each other; and a controller that includes: an edge detection circuit receiver connected to receive the output signal from the edge detection circuit; a delay line control circuit connected to provide a delay time control signal to the delay line; a voltage comparator receiver connected to receive the first signal from the voltage comparator; and a voltage control unit connected to provide a controlled voltage to the voltage comparator..
Taiwan Semiconductor Manufacturing Co., Ltd.


04/21/16
20160109488 
 Measuring output current in a buck smps patent thumbnailMeasuring output current in a buck smps
A sample and hold circuit takes a sample of the current flowing through an inductor of a buck switched-mode power supply (smps) at substantially the middle of the low side portion (50 percent point during low side switch on) of the pulse width modulation (pwm) period. This sample of the current through the smps inductor during the low side on 50% point may be considered as the “average” or “dc output” current of the smps, and taken every time at precisely the same low side on 50%.

04/14/16
20160105001 
 Igniter patent thumbnailIgniter
An igniter includes a switch element and a switch control apparatus. An ignition signal igt is input to an input line of the switch control apparatus.

03/31/16
20160094206 
 Oscillator circuit patent thumbnailOscillator circuit
Provided is a cr oscillator circuit that achieves a small occupied area and good oscillation frequency accuracy while having small current consumption. The cr oscillator circuit includes: a reference voltage circuit configured to switch and output a reference voltage; a first constant current source configured to charge a capacitor; a second constant current source configured to discharge the capacitor; a voltage comparator configured to compare voltages of the reference voltage circuit and the capacitor; and a logic circuit.
Seiko Instruments Inc.


03/10/16
20160071617 

Voltage comparator circuit and usage thereof


A method for testing a circuit comprising a memory element, a voltage comparator and a supply selector, the circuit is configured to be connected to two power supplies, the voltage comparator is configured to provide an output indicative of a voltage difference between the two power supplies above a predetermined threshold, the supply selector is configured to select a power supply to feed power to the memory element in response to the output from the voltage comparator. The method comprises connecting the two power supplies to the circuit, wherein said connecting comprises causing the two power supplies to drive power to the memory element and to another element of the circuit, wherein the voltage different between the two power supplies is above the predetermined threshold.
International Business Machines Corporation


03/10/16
20160071551 

Voltage comparator circuit and usage thereof


A circuit comprising a first power supply having a first voltage and a second power supplying having a second voltage, wherein said first and second voltages are different at least in some cycles of said circuit, a memory element, wherein said first and second power supplies are driven into said memory element, a voltage comparator having connected thereto said first and second power supplies, wherein said voltage comparator is an analog to digital converter configured to provide digital output indicting of a voltage difference over a predetermined threshold between said first and second power supplies, and a supply selector element, wherein said supply selector element is configured to disconnect said second power supply from said memory element in response to the digital output of said voltage comparator.. .
International Business Machines Corporation


02/25/16
20160055049 

Ultra low power programmable supervisory circuit


An ultra-low-power supervisory circuits can employ floating gate transistors. In an example, a supervisory circuit can include a reset output circuit, a voltage comparator circuit configured to reset the reset output circuit when a first input voltage falls below a reference voltage, and a watchdog circuit configured to receive a watchdog signal and to reset the reset output circuit if the watchdog signal does not transition within a predetermined watchdog interval.
Analog Devices Global


01/14/16
20160011611 

Fast response pulse width modulation control for switching regulator


A switching rectifier circuit includes a pulse width modulation controller, a voltage switching circuit, a pulse width modulation comparator, an error amplifier, a voltage reference, a high threshold voltage comparator and a low threshold voltage comparator. A varying output voltage of the voltage regulator is sampled and compared to a high threshold voltage reference and a low threshold voltage reference.
Sandisk Technologies Inc.


12/31/15
20150382308 

Method and controlling power at base station in a communication system


A method and apparatus for controlling power of a base station (bs) in a wireless communication system are provided, in which a voltage comparator compares an operation voltage of a power control target of the bs with a minimum required voltage for the power control target, and a controller decreases the operation voltage of the power control target by a predefined level, if the operation voltage is higher than the minimum required voltage, and increases the operation voltage of the power control target by a predefined level, if the operation voltage is lower than the minimum required voltage.. .
Samsung Electronics Co., Ltd.


11/19/15
20150333745 

Voltage comparator


A voltage comparator for comparing reference voltage applied to a first input node to an input voltage applied to a second input node. A first pair of transistors have output terminals coupled in series between the first input node and common node, and gate terminals connected together.
Lsi Corporation


10/29/15
20150309088 

Verification of bandgap reference startup


A bandgap reference (bgr) startup verification circuit includes a current minor for receiving an output current from a bandgap reference (bgr) circuit and generating output currents therefrom. A first verification sub-circuit is coupled to receive a first output current to generate a detection voltage (vdet) and includes a voltage comparator receiving vdet and a voltage output of the bgr circuit (vbg) to provide a first verification output.
Texas Instruments Deutschland Gmbh


10/29/15
20150309087 

Overcurrent detector


An overcurrent detector that includes a sense transistor connected to a sense resistor, a second transistor matched to the sense transistor and connected in parallel to a second resistor, and a voltage comparator coupled to the sense transistor and second resistor. The sense transistor is configured to connect in a same gate and source connection with a driver output transistor.
Texas Instruments Incorporated


09/24/15
20150270700 

Method and system to prevent bus voltage sagging when an oring-fet in an n+1 redundant power supply configuration is faulty during power up


A system and method for preventing bus voltage sagging when an oring-fet in an n+1 redundant power supply configuration is faulty during power up. Each redundant power supply includes an oring-fet and a voltage comparator.
Cisco Technology, Inc.


07/30/15
20150212497 

Universal serial bus active cable power management


The present disclosure provides a system and method for controlling power in an active cable via a circuit mechanism located internally within the cable assembly. The system may include a first device communicatively coupled to a second device via the cable assembly and a device power line.
Intel Corporation


07/02/15
20150184634 

System and protection of a wind turbine battery backup pitch control system


A pitch control system for a wind turbine includes a backup battery bank assigned to each pitch drive motor, with each battery bank having a plurality of individual batteries connected in series. A battery charger is connected in parallel across each battery in the battery bank.
General Electric Company


04/30/15
20150115746 

Apparatus and selectively determining a mode of operation


An apparatus for selectively switching a mode of operation of a detector, the apparatus comprising a detector configured for connection to a signalling terminal, switching means for configuring the detector to operate in one of sink mode or source mode and a voltage comparator, wherein the apparatus is configured to selectively switch to operate in sink mode or source mode based on a comparison of a voltage from the signalling terminal received at the voltage comparator with a threshold voltage.. .
Crowcon Detection Instruments Limited


04/16/15
20150102841 

Circuit for current sensing in high-voltage transistor


An integrated circuit including a high-voltage n-channel mos power transistor, a high-voltage n-channel mos blocking transistor, a high-voltage n-channel mos reference transistor, and a voltage comparator, configured to provide an overcurrent signal if drain current through the power transistor in the on state exceeds a predetermined value. The power transistor source node is grounded.
Texas Instruments Incorporated


04/02/15
20150091644 

Class hd power amplifier


A multi-level amplifier including a converter circuit being supplied with a supply voltage and operable to generate at least two output voltages, a voltage comparator circuit adapted to compare each of the output voltages with the supply voltage to generate a driving signal, and an amplifier circuit being supplied with an analog input signal, the amplifier circuit including an analog-to-digital converter coupled to a power stage driver and power stage, wherein the power stage driver receives the driving signal from the voltage comparator.. .
Analog Devices Technology


03/19/15
20150077082 

Apparatus and a boost converter with improved electrical overstress (eos) tolerance


An apparatus and method for a boost power converter with improved electrical overstress (eos) tolerance is disclosed. A boost power converter provides a providing a pulse width modulation (pwm) boost power converter with an electrical overstress (eos) boost over-voltage comparator/switch network comprises a boost power converter, a boost overvoltage comparator, a boost overvoltage comparator feedback network, and a boost overvoltage switch.
Dialog Semiconductor Gmbh


02/12/15
20150046111 

Laser heterodyne interferometric signal processing method based on locking edge with high frequency digital signal


The present invention discloses a processing method for laser heterodyne interferometric signal based on locking edge with high frequency digital signal. A reference signal and a measurement signal of heterodyne interferometer, after being processed by photodetector, signal amplifier, filtering circuit, voltage comparator and high frequency digital edge locking module, are transferred to pulse counting synchronized latching processing module, to obtain entire cycle interference fringe numbers and filling pulse numbers in one interference fringe cycle, of the reference signal and the measurement signal; the numbers are transferred to a computer to obtain displacement and speed of a measured object; usage of a high frequency digital pulse signal to lock the rising edge of laser heterodyne interferometric signal can improve the gradient of the rising edge of interference signal and eliminate wrong pulse caused by noises, and improve the accuracy and stability of the processing for the following signals..
Zhejiang Sci-tech University


11/27/14
20140347895 

Switching power-supply device


A switching power-supply device includes a comp-voltage comparator circuit that compares a comp-voltage obtained by performing phase compensation on the feedback signal, with a first threshold voltage which is a threshold value; and an intermittent-oscillation control circuit that, if it is detected by the comp-voltage comparator circuit that the comp-voltage is lower than the first threshold voltage, stops the switching operation of the switching device and performs a transition to a first intermittent oscillation operation in which the switching device performs the switching operation every predetermined first period, wherein if a predetermined delay period elapses in a state where the comp-voltage is lower than the first threshold voltage, the intermittent-oscillation control circuit performs a transition to a second intermittent oscillation operation in which the switching device performs the switching operation every second period which is an integral multiple of the first period.. .

11/27/14
20140347100 

Method and determining time-varying limitations of a power source


A low-power method and apparatus is provided for adapting to time-varying limitations of a power source, such as a vehicle power source which is in a more-limited state when the engine is off. The supply voltage is monitored for changes using an unclocked, low-power first stage having an analog section, a voltage comparator.

11/20/14
20140339991 

Backlight drive circuit with dual boost circuits


The present invention provides an led backlight drive circuit, which includes a first power supply module, an electrical inductor, a rectifier diode, a mos transistor, an electrolytic capacitor, an led light string, a voltage division module, a voltage comparator, a second power supply module, and an led constant-current drive chip. The led backlight drive circuit is arranged to include a voltage comparator in an external circuit of the led constant-current drive chip to detect output voltage of the drive circuit so that high voltage, the voltage comparator is caused to supply a low voltage level to forcibly pull down a pwm dimming signal or an ena enabling signal of the led constant-current drive chip to achieve an over-voltage protection function and also enable removal of over-voltage protection module from a conventional led constant-current drive chip..

11/13/14
20140333137 

Dc-based uninterruptible power detecting abnormal voltage


A direct current (dc) uninterruptible power system is disclosed. The dc-based uninterruptible power system includes a multiplexer, a battery unit, a linear regulator, a switch-transistor, a voltage comparator and micro controller.

10/09/14
20140300415 

Input common mode control using a dedicated comparator for sensor interfaces


Various embodiments of the invention allow for low-noise, high performance input common mode voltage control in capacitive sensor front end amplifiers. In certain embodiments overcome the shortcomings of the prior art by implementing a full voltage swing common mode voltage comparator in a parallel feed-forward path to compensate large common mode input signal variations..

09/18/14
20140266152 

On-chip eye diagram capture


An eye diagram capture device includes a delay line arranged to receive a digital signal and output time delayed version of the digital signal. An edge detection circuit is arranged to receive the digital signal and the time delayed version of the digital signal, the edge detection circuit operating to output a signal corresponding to a logical value of the digital signal received coincident with an edge of the time delay version of the digital signal.

09/18/14
20140266129 

Method and system for regulating battery voltages in handheld/portable electronic systems


A power supply circuit (1) for powering a load device (10) with the requirements of a high power burst at a low duty cycle. The power circuitry includes; a power source (2), a voltage comparator (3) which makes sure that the power source has enough power for the system, a series boost regulator (5) which delivers a higher voltage to the capacitor (7), a switching buck/boost regulator (8) which receives the voltage from the capacitor and regulates the higher or lower voltage to the load device..

09/18/14
20140265840 

Current control module for a vehicle


A current control module is used in a vehicle having a marker or tail lamp, a stop lamp, a left turn signal and a right turn signal. The current control module includes a circuit board and at least one wire coupled to the circuit board, the at least one wire corresponding to one of the marker or tail lamp, stop lamp, left turn signal or right turn signal.

09/11/14
20140254202 

Low threshold voltage comparator


A voltage comparator includes an amplifier coupled to receive an input signal at an amplifier input and generate an output signal at an amplifier output in response to the input signal. The amplifier includes a current generation circuit coupled to generate a first current flowing through a first branch and a second current flowing through a second branch.

09/11/14
20140253080 

Method and advanced pulse skipping control in buck regulators


A method and apparatus for determining the entry and exit from a pulse skipping mode in a power supply is provided. The power supply may incorporate a buck regulator.

09/04/14
20140247171 

Asynchronous sampling using dynamically configurable voltage polling levels


A method, comprising: receiving an analog input; determining an upper outer rail and a lower outer rail as polling values to be used by voltage comparators; blanking at least three comparators; determining which two of the at least three comparators are closest to the input analog voltage levels; defining the two comparators which are closest to the analog input signal to be the next comparators of the next sampling process; assigning a remaining comparator at a voltage level in between the new top and bottom voltage levels; enabling the outer rails, but blanking the inner rail; progressively narrowing down the voltage range spanned by the two outer comparators; and generating a 2-tuple value of an asynchronous voltage comparator crossing.. .

09/04/14
20140246979 

Led backlight drive circuit


The present invention provides an led backlight drive circuit, which includes a first power supply module, an electrical inductor, a rectifier diode, a mos transistor, an electrolytic capacitor, an led light string, a voltage division module, a voltage comparator, a second power supply module, and an led constant-current drive chip. The led backlight drive circuit is arranged to include a voltage comparator in an external circuit of the led constant-current drive chip to detect output voltage of the drive circuit so that high voltage, the voltage comparator is caused to supply a low voltage level to forcibly pull down a pwm dimming signal or an ena enabling signal of the led constant-current drive chip to achieve an over-voltage protection function and also enable removal of over-voltage protection module from a conventional led constant-current drive chip..

07/31/14
20140210653 

Data-driven noise reduction technique for analog to digital converters


A successive operation register (sar) analog-to-digital converter (adc) circuit includes a bit reliability circuit that detects a delay time of the voltage comparator and, if the detected delay time is greater than a delay threshold time τmv, outputs a bit reliability decision signal; a digital noise reduction circuit that is selectively activated if the bit reliability decision signal indicates the detected delay time is greater than the delay threshold time τmv and produces a noise-reduced decision output that supersedes the decision output of the voltage comparator. In a preferred embodiment, the digital noise reduction circuit uses a multiple voting logic to produce a majority vote value as the noise-reduced decision output..

07/17/14
20140198559 

Circuit and reading a resistive switching device in an array


A read circuit for sensing a resistance state of a resistive switching device in a crosspoint array utilizes a transimpedance equipotential preamplifier connected to a selected column line of the resistive switching device in the array. The equipotential preamplifier delivers a sense current while maintaining the selected column line at a reference voltage near a biasing voltage applied to unselected row lines of the array.

06/12/14
20140162550 

Wireless data transmission via inductive coupling using di/dt as the magnetic modulation scheme and hysteresis


The disclosed couplers operate in a “near field” mode, meaning energy, whether used to transmit data or power, is transferred through magnetic induction using a ∂i/∂t circuit (meaning a change in current over a change in time), such as by using inductive transmission and receive coils in which resistors and/or other components such as diodes are placed into series and/or in parallel with the coils and used to control the shape of the pulse, e.g. Its voltage and/or frequency.

06/05/14
20140152394 

Frequency detection circuits, radio frequency signal processing devices and methods for calibrating inductance and capacitance


A frequency detection circuit includes a filter, a power detector and a voltage comparator. The filter receives and filters a converted signal to generate a filtered signal.

05/29/14
20140145699 

Systems and methods for controlling power in semiconductor circuits


A power control circuit includes a plurality of transistors coupled between a power supply node and a gated power supply node, wherein the gate electrode of a first transistor of the plurality of transistors is coupled to receive a power control signal, wherein, in response to assertion of the power control signal, the first transistor is placed into a conductive state; a first voltage comparator, wherein, in response to assertion of the power control signal, places a second transistor of the plurality of transistors in a conductive state when a voltage on the gated voltage supply node reaches a first reference voltage; and a second voltage comparator, wherein, in response to assertion of the power control signal, places a third transistor of the plurality of transistors in a conductive state when the voltage on the gated voltage supply node reaches a second reference voltage different from the first reference voltage.. .

05/15/14
20140133248 

Apparatus and method to adjust clock duty cycle of memory


An embodiment of the invention provides a memory controller for controlling a memory. The memory controller comprises a pulse width modulation module, a voltage comparator and a duty cycle calibration device.

04/17/14
20140104262 

Liquid crystal display device and driving method thereof


In a video voltage comparator circuit, an average of first video voltages applied to pixel electrodes of pixels in the second-half rows in a k-th frame period (k is a natural number) is compared with an average of second video voltages applied to pixel electrodes of pixels in the first-half rows in a (k+1)th frame period for each row. In an overdrive voltage switching circuit, when a difference obtained from the comparison in the video voltage comparator circuit is greater than or equal to a threshold value, the overdrive voltage in the (k+1)th frame period is switched to a first overdrive voltage, and when the difference obtained from the comparison in the video voltage comparator circuit is less than the threshold value, the overdrive voltage in the (k+1)th frame period is switched to a second overdrive voltage lower than the first overdrive voltage..

03/27/14
20140084884 

Lc switching regulators


A switching regulator is used in a circuit having an inductor and one or more switches that control charges applied to the inductor from an input voltage source. The switching regulator has an error amplifier configured to generate an error voltage signal by amplifying a difference between a feedback output voltage and a reference voltage, an inductor current emulation circuit configured to generate an emulated inductor current signal that emulates an inductor current that flows through the inductor, an error voltage comparator configured to generate a timing pulse signal by comparing the error voltage signal to the emulated inductor current signal and a controller configured to modulate at least one switching intervals of the switches by control signals generated based on the timing pulse signal..

03/20/14
20140080353 

Connector apparatus and adapter apparatus with indication function


A connector apparatus with indication function includes a first power line, a current-detecting resistor, a second power line, a ground line, a current-detecting unit, a first voltage comparator, a second voltage comparator, a first light-emitting unit, a second light-emitting unit, and a voltage division unit. The first light-emitting unit is lighting but the second light-emitting unit is not lighting when one side of the connector apparatus is connected to a computer and the other side of the connector apparatus is not connected to a smart 3c electronic product.

03/20/14
20140078629 

Semiconductor device including short-circuit protection


A semiconductor device includes a load current path operable to carry a load current from a supply terminal having a supply voltage to an output circuit node. The device further includes a voltage comparator configured to compare the supply voltage with a voltage threshold and to signal a low supply voltage when the supply voltage reaches or falls below the voltage threshold.

02/27/14
20140055105 

Voltage scaling system


A circuit for downscaling voltage comprising: a voltage regulator; a voltage reference register configured to provide a voltage reference value; a voltage comparator configured to output a logical one if a supply voltage of the voltage regulator is greater than the voltage reference value, wherein a first input of the voltage comparator is coupled to output of the voltage regulator and a second input of the voltage comparator is coupled to output of the voltage reference register; an and gate, where a first input of the and gate is coupled to output of the voltage comparator and a second input of the and gate is coupled to a voltage reference ready signal; a switch configured to close based on output of logical one from the and gate; and a pull-down resistor configured to couple to the output of the voltage regulator only if the switch is closed.. .

02/27/14
20140055050 

Apparatus for driving a plurality of segments of led-based lighting units


An led-based lighting apparatus includes a plurality of led-based lighting segments connected in series with a current control device. Each lighting segment has at least one led-based lighting unit connected in series.

01/23/14
20140021983 

Circuit for current sensing in high-voltage transistor


An integrated circuit including a high-voltage n-channel mos power transistor, a high-voltage n-channel mos blocking transistor, a high-voltage n-channel mos reference transistor, and a voltage comparator, configured to provide an overcurrent signal if drain current through the power transistor in the on state exceeds a predetermined value. The power transistor source node is grounded.

01/02/14
20140006688 

Endurance and retention flash controller with programmable binary-levels-per-cell bits identifying pages or blocks as having triple, multi, or single-level flash-memory cells


An retention flash controller reads assigned-level bits from a bad block/erase count table or from a page status table that indicate when flash memory cells operate as triple-level-cell (tlc), multi-level-cell (mlc), or single-level-cell (slc). Pages that fail as tlc or mlc are downgraded for use as slc pages by changing the assigned-level bits.

01/02/14
20140002006 

Battery protection circuits


An overvoltage battery protection circuit includes a voltage comparator configured to compare a scaled version of a voltage with a voltage reference and indicate an overvoltage condition when the scaled voltage exceeds the voltage reference. The voltage comparator is powered by a first voltage domain.

12/19/13
20130336036 

Non-volatile memory having 3d array architecture with bit line voltage control and methods thereof


In a 3d memory with vertical local bit lines, each local bit line is switchably connected to a node on a global bit line having first and second ends, the local bit line voltage is maintained at a predetermined reference level in spite of being driven by a bit line driver from a first end of the global bit line that constitutes variable circuit path length and circuit serial resistance. This is accomplished by a feedback voltage regulator comprising a voltage clamp at the first end of the global bit line controlled by a bit line voltage comparator at the second end of the global bit line.

11/28/13
20130314068 

Temperature adaptive bandgap reference circuit


This invention involves a bandgap reference circuit in ic. The temperature coefficient of conventional bandgap reference is large and the higher order compensation is difficult to implement.

10/24/13
20130279054 

Overvoltage protection method using exposed device supply rail


A semiconductor device may be protected from over-voltages via a comparator-controlled, high-current fet coupled to the semiconductor device output and between circuit devices that carry high voltages. A three-terminal, n-channel field effect transistor (fet) may have its source coupled to the output of the semiconductor device to be protected from over voltage.

10/10/13
20130265817 

Memory system


A memory system includes a plurality of memory cells. Each memory cell includes a first storage cell including a first capacitor configured to store a first analog charge representing a first boolean value, a second storage cell including a second capacitor configured to store a second analog charge representing a second boolean value, and a charging path configured to apply, for a first time duration, a voltage to the first capacitor or the second capacitor during a write operation.

09/12/13
20130235685 

Semiconductor memory device and screening the same


A semiconductor memory device may include a voltage comparator, a voltage generator, a counter, and a circuit. The voltage comparator may be configured to generate an enabling signal responsive to a comparison indicating that a first voltage is lower than a reference voltage.

08/15/13
20130207708 

High-resolution phase interpolators


A phase interpolator circuit is provided that generates an output clock signal by interpolating between phases of first and second clock signals. Interpolation is performed by detecting an edge of the first clock signal and applying a first current to charge a capacitance of an output node to a voltage level which is less than or equal to a switching threshold of a voltage comparator, and detecting an edge of the second clock signal and applying a second current to charge the capacitance of the output node to a voltage level which exceeds the switching threshold of the voltage comparator.

08/15/13
20130207707 

High-resolution phase interpolators


A phase interpolator circuit is provided that generates an output clock signal by interpolating between phases of first and second clock signals. Interpolation is performed by detecting an edge of the first clock signal and applying a first current to charge a capacitance of an output node to a voltage level which is less than or equal to a switching threshold of a voltage comparator, and detecting an edge of the second clock signal and applying a second current to charge the capacitance of the output node to a voltage level which exceeds the switching threshold of the voltage comparator.

05/30/13
20130135944 

Dual power supply memory array having a control circuit that dyanmically selects a lower of two supply voltages for bitline pre-charge operations and an associated method


Disclosed is a memory array in which the lower of two supply voltages from two power supplies is dynamically selected for bitline pre-charge operations. In the memory array, a voltage comparator compares the first supply voltage on a first power supply rail to a second supply voltage on a second power supply rail and outputs a voltage difference signal.

05/16/13
20130121372 

High resolution temperature measurement


Temperature is determined by measuring the time it takes to charge a capacitor with a resistive temperature sensor. A clock, time counter, a voltage comparator and voltage reference are used in determining a course time measurement.

05/02/13
20130106304 

Device and driving leds


In a device and method for providing electrical current to a light emitting diode (led) via switch mode power converter, at least one integrated circuit (ic) is provided and uses a hardware description language; an electronic switch configurable to have a switching time period. An analogue to digital converter (adc) is configured to obtain a digitized voltage input.

04/25/13
20130099825 

Voltage comparator


The present disclosure provides a voltage comparator including a current source, a differential gain module and a switch module, wherein the magnitude of the current flowing through the current source is nano ampere level; the differential gain module includes a first transistor, a second transistor, a third transistor and a fourth transistor, wherein the first transistor and the second transistor are respectively connected to the current source, the third transistor and the fourth transistor form a mirror current structure, the third transistor is connected to the first transistor, and the fourth transistor is connected to the second transistor via a ninth transistor used for forming asymmetric differential gain.. .

04/11/13
20130088262 

Low voltage comparator circuits


Circuits that operate with power supplies of less than 1 volt are presented. More particularly, circuits that operate with supply voltages near or lower than the threshold voltage of the transistors in those circuits are presented.

03/21/13
20130073240 

Semiconductor device and temperature sensor system


A temperature sensor in a semiconductor device includes a temperature detection circuit for outputting a voltage according to the chip temperature, a reference voltage generating circuit for generating a plurality of reference voltages, and a plurality of voltage comparators for comparing each reference voltage with an output voltage of the temperature detection circuit and thereby generating a chip temperature detection signal configured with multiple bits. Further, the temperature sensor includes a control circuit for controlling the reference voltages generated by the reference voltage generating circuit based on the chip temperature detection signal and thereby changing correspondence between the chip temperature detection signal and the chip temperature to shift a chip temperature detection range.

02/07/13
20130033327 

High frequency circuit and high frequency module


A high frequency circuit and a high frequency module are provided, in which the accuracy of compensation operation is improved in compensating by digital control. The amplification gain of an amplification element of an amplifier unit is controlled by a bias current of a bias control unit.



Voltage Comparator topics: Voltage Comparator, Semiconductor, Reference Voltage, Memory Cell, Interpolation, Phase Interpolator, Semiconductor Device, Overvoltage Protection, Field Effect Transistor, Memory Cells, Boolean Value, Semiconductor Memory, Memory Device, Voltage Comparator Circuit, Comparator Circuit

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