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Voltage Comparator patents



      
           
This page is updated frequently with new Voltage Comparator-related patent applications. Subscribe to the Voltage Comparator RSS feed to automatically get the update: related Voltage RSS feeds. RSS updates for this page: Voltage Comparator RSS RSS


Dc-based uninterruptible power system and method for detecting abnormal voltage

Dc-based uninterruptible power system and method for detecting abnormal voltage

Date/App# patent app List of recent Voltage Comparator-related patents
11/20/14
20140339991
 Backlight drive circuit with dual boost circuits patent thumbnailBacklight 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 system and method for detecting abnormal voltage patent thumbnailDc-based uninterruptible power system and method for 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 patent thumbnailInput 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 patent thumbnailOn-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 patent thumbnailMethod 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 patent thumbnailCurrent 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 patent thumbnailLow 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 apparatus for advanced pulse skipping control in buck regulators patent thumbnailMethod and apparatus for 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 patent thumbnailAsynchronous 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 patent thumbnailLed 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 method for 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 method of 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 method for 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.


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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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