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Current Source Circuit patents



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


Programmable current source with optimized compliance region for efficient backlighting in portable applications

Programmable current source with optimized compliance region for efficient backlighting in portable applications

Date/App# patent app List of recent Current Source Circuit-related patents
10/23/14
20140312963
 Switchable current source circuit and method patent thumbnailSwitchable current source circuit and method
A switchable current source in which a reference voltage value to be used in driving the gate of an output transistor is sampled and stored. The reference voltage is derived using a reference current source which feeds a current sensing transistor.
10/09/14
20140300292
 Programmable current source with optimized compliance region for efficient backlighting in portable applications patent thumbnailProgrammable current source with optimized compliance region for efficient backlighting in portable applications
A programmable current source programmable current source circuit has dac current source providing an incrementally programmable current levels. A programmable reference current source adjusts a compliance factor of the dac current source.
09/18/14
20140266133
 Power converting circuit and control circuit thereof patent thumbnailPower converting circuit and control circuit thereof
A power converting circuit includes an upper gate switch, a transistor, a current source circuit, a comparator circuit, a delay circuit, and a pulse width modulation signal generating circuit. The transistor and the current source circuit provide a reference signal.
09/18/14
20140265570
 Multi-load drive circuit patent thumbnailMulti-load drive circuit
A circuit arrangement includes a first number of loads connected in series. Each of a second number of drive units is coupled to at least one of the first number of loads, and is configured to assume a first operation state or a second operation state.
09/11/14
20140254220
 Electronic power converter with ground referenced lossless current sensing patent thumbnailElectronic power converter with ground referenced lossless current sensing
A current sensing circuit for an electronic power converter having an inductor that is not referenced to ground is configured to provide an output signal that is referenced to ground and is proportional to the current flow between the inductor and a load in an electrical power system. The current sensing circuit includes outputs associated with a voltage of the inductor, a current source circuit, a current steering circuit responsive to the voltage outputs and a level shifting circuit..
08/21/14
20140232622
 Current source circuit, a signal line driver circuit and a driving method thereof and a light emitting device patent thumbnailCurrent source circuit, a signal line driver circuit and a driving method thereof and a light emitting device
A current source circuit includes current sources that are each configured to receive an external set signal and to control an output current value based on the external set signal. A changing over circuit that is electrically connected to the current sources and a set of output lines selects one of the current sources to be electrically connected to each of the output lines..
08/21/14
20140232346
 Active cell and module balancing for  batteries or other power supplies patent thumbnailActive cell and module balancing for batteries or other power supplies
A system configured to actively balance power among power cells such as batteries. The system includes a power module of series-coupled power cells, each exhibiting different charge levels during charging and discharging.
08/21/14
20140232295
 Led driving device patent thumbnailLed driving device
An led driving device has a first constant current source circuit and a voltage control circuit. The first constant current source outputs a first constant current to a first node and the first constant current flows into a first led module disposed between a driving node and the first node; wherein, the first constant current source circuit has a first detection node for generating a first detection signal in response to the voltage level of the first node.
08/14/14
20140225455
 Hvac system with improved control switching patent thumbnailHvac system with improved control switching
An hvac switching circuit may comprise a current source circuit charging a capacitor used to power an hvac dc power relay coil. The power relay coil terminal is connected to an activation control circuit which comprises at least one of (1) each of (a) a threshold circuit which activates a first transistor to energize the power relay coil when the voltage across the threshold circuit reaches a first threshold value and (b) a regenerative feedback circuit configured to lower the first threshold value to a second threshold voltage, and (2) a voltage divider connected between a first terminal on the power relay coil and the negative dc supply, and a programmable shunt regulator, configured as a level triggered switch, programmed by the voltage divider and connected between the second power relay coil terminal and the negative dc supply..
07/17/14
20140197890
 Precise current source circuit for bias supply of rf mmic gain block amplifier application patent thumbnailPrecise current source circuit for bias supply of rf mmic gain block amplifier application
A current source circuit includes a first transistor q1, a second transistor q2, a first resistor r1, and a second resistor r2. The first transistor q1 has a first terminal (collector) coupled with the supply voltage (vcc), a second terminal (base) coupled with the first resistor r1, and a third terminal (emitter) coupled with the second resistor r2.
07/10/14
20140194947
Current generation architecture for an implantable stimulator device having coarse and fine current control
Disclosed herein are current output architectures for implantable stimulator devices. Current source and sink circuitry is divided into a plurality of stages, each of which is capable via an associated switch bank of sourcing or sinking an amount of current to or from any one of the electrodes of the device.
06/12/14
20140160331
Solid-state imaging device and imaging apparatus
A solid-state imaging device includes a plurality of pixel cells arranged in rows and columns, a plurality of vertical signal lines each of which is provided for a corresponding one of the columns, and a plurality of column circuits each of which is provided for a corresponding one or more of the columns and into each of which are input the signal voltages output to one or more of the vertical signal lines disposed in the corresponding one or more of the columns. Each of the plurality of column circuits includes an amplifier that includes a constant current source transistor, the solid-state imaging device further includes a reference current source circuit that supplies a first bias voltage to gates of a plurality of the constant current source transistors included in the column circuits, and each of the column circuits further includes a sample-and-hold circuit that holds the first bias voltage..
06/05/14
20140153148
Over voltage protection for a thin oxide load circuit
An ic includes: a substrate having a thick oxide portion and a thin oxide portion; a load circuit disposed on the thin oxide portion and coupled between a supply node and a virtual supply node; and a current source circuit and protection circuit disposed on the substrate. The current source circuit has an output coupled to the virtual supply node and is operable to provide a voltage at the virtual supply node.
05/15/14
20140132072
Current output circuit and two-wire transmitter
A current output circuit for a two-wire transmitter includes a first current source circuit configured to output a first current controlled by a control voltage generated based on a physical quantity, a second current source circuit configured to output a second current controlled by the first current, a first shunt voltage source circuit configured to generate an internal power source of the two-wire transmitter from the second current, a third current source circuit configured to generate a third current controlled by a reference voltage, and a second shunt voltage source circuit configured to generate a power source of the second current source circuit by the third current. The current output circuit is configured to output a predetermined current controlled by the control voltage based on the first current, the second current and the third current to an external circuit through two transmission lines..
05/01/14
20140117969
Constant current source circuit
A current source includes a first mos transistor of a first channel type including a drain connected to an output terminal, and a source directly connected to a first power supply, a second mos transistor of the first channel type including a drain connected to a gate, the gate of the second mos transistor being connected to the gate of the first transistor, and a source directly connected to the first power supply, a third mos transistor of a second channel type opposite the first channel type including a drain connected to the drain of the second mos transistor, a fourth mos transistor of the second channel type including a drain connected to the source of the third mos transistor, a gate connected to a first bias voltage, and a source directly connected to second power supply voltage, and a control voltage generator that detects an output voltage on the output terminal and provides a shifted version of the output voltage to the gate of the third mos transistor.. .
04/17/14
20140103900
Low power reference generator circuit
A ptat circuit includes a first, second, third, and fourth transistors plus a resistor. The first and second transistors have control terminals coupled to each other.
04/10/14
20140100643
Current output architecture for an implantable stimulator device
Disclosed herein are current output architectures for implantable stimulator devices. Current source and sink circuitry is divided into a plurality of stages, each of which is capable via an associated switch bank of sourcing or sinking an amount of current to or from any one of the electrodes of the device.
03/20/14
20140077783
Adjusting apparatus and adjustment method
An adjusting apparatus sets a designated value of a current source circuit to be a predetermined value, and causes discharging of a capacitor to end by switching a switch to a discharging side when the capacitor is not being charged by current output from a switching power source circuit. After the discharging of the capacitor ends and the designated value is set, the adjusting apparatus causes the capacitor to be charged by switching the switch to a charging side.
12/05/13
20130322127
Current-fed full-bridge dc-dc converter
A current-fed full-bridge dc-dc converter includes a current source circuit including a direct-current voltage source circuit and a reactor connected to the direct-current voltage source circuit in series, an inverter circuit including switching elements, input terminals and output terminals, wherein outputs of the current source circuit are connected to the input terminals, a transformer having a primary coil that is connected to the output terminals and a secondary coil and a rectifier circuit which is connected to the secondary coil and through which the current-fed full-bridge dc-dc converter generates direct-current output. The current-fed full-bridge dc-dc converter further includes a capacitor connected to the output terminal and the primary coil in series and a controller controlling on/off operations of the switching elements so that a current can flow from the current source circuit through the primary coil and the capacitor in stopping of the current-fed full-bridge dc-dc converter..
11/28/13
20130314111
Apparatus for testing thyristor valve
An apparatus for testing a thyristor valve includes: a current source circuit that provides an electric current when a thyristor valve as a test target is turned on; a voltage source circuit that provides a reverse voltage or a forward voltage when the thyristor valve is turned off; and a first auxiliary valve provided between a connection point between the thyristor valve and the voltage source circuit and the current source circuit, and that insulates the current source circuit from the voltage source circuit to protect the current source circuit from a high voltage of the voltage source circuit.. .
10/24/13
20130279624
High performance transmitter having high speed and efficiency
According to an exemplary implementation, a transmitter includes a decoder circuit receiving a digital input from a digital back-end circuit. The decoder circuit includes a plurality of decoder cells.
10/24/13
20130278340
Power amplifiers with improved power control
Aspects of a system for improving efficiency over power control for linear and class ab power amplifiers may include a current source circuit that enables determination of a bias current level for a pa circuit within an ic die based on an amplitude of an input modulation signal. The pa circuit may enable generation of an output signal based on a differential input signal and the input modulation signal to the current source circuit.
10/24/13
20130278339
Power control for power amplifiers
Aspects of a system for improving efficiency over power control for linear and class ab power amplifiers may include a current source circuit that enables determination of a bias current level for a pa circuit within an ic die based on an amplitude of an input modulation signal. The pa circuit may enable generation of an output signal based on a differential input signal and the input modulation signal to the current source circuit.
10/17/13
20130271106
Optimization methodology and apparatus for wide-swing current mirror with wide current range
A current mirror circuit includes an input portion configured to conduct a bias current, and a first current source circuit coupled to the input portion and configured to generate the bias current, and vary the bias current over a range of currents based on a first group of weightings associated therewith. The current mirror circuit also includes an output portion configured to conduct an operational current, wherein the output portion is coupled to the input portion, and a second current source circuit coupled to the output portion and configured to generate the operational current, and vary the operational current over a range of currents based on a second group of weightings associated therewith.
10/10/13
20130265019
Current source circuit with temperature compensation
A current source circuit with temperature compensation includes a power supply terminal, a reference current source unit connected to the power supply terminal, a feedback control unit connected to the power supply terminal and the reference current source unit, a current source generating unit connected to the feedback control unit and a ground terminal connected to the current source generating unit. The reference current source unit is a current source connected to the power supply terminal.
10/03/13
20130257491
Driver with resistance calibration capability
A semiconductor device includes a driver circuit having an output resistance that is controllable responsive to a resistance control signal and a calibration circuit configured to duplicate a resistance behavior of the driver circuit and to generate the resistance control signal responsive to the duplicated resistance behavior. The driver circuit may include a first variable resistor and may be configured to couple an output node to a power supply node via the first variable resistor responsive to an input signal the calibration circuit may include a second variable resistor that is a duplicate of the first variable resistor.
09/19/13
20130241609
Semiconductor device
A semiconductor device for ignition performing a current control function and a self shut down function can include a pulse generating circuit, a switching circuit, and a current source circuit, the three circuits together generating a pulse current that discharges a capacitor in the self shut down process. This construction can serve to suppress oscillation of a collector current ic of the output stage igbt in the operating processes of the current control circuit and the self shut down circuit, thus preventing or minimizing the likelihood of the ignition plug from erroneous ignition.
09/12/13
20130234617
Current control system
A current control system, and method for controlling current, and a lighting system including the same, are provided. The current control system includes front end circuitry to receive an input voltage and provide a regulated dc voltage to current source circuitry via a first input voltage terminal.
08/01/13
20130194039
Differential amplifier circuit with ultralow power consumption provided with adaptive bias current generator circuit
A differential amplifier circuit includes a differential operational amplifier that includes a differential pair circuit and operates based on a constant bias current supplied from a bias current source circuit, and the differential amplifier circuit includes a bias current generator circuit. A current monitor circuit detects two currents flowing through the differential pair circuit in correspondence with differential input voltages inputted to the differential pair circuit, and detect a minimum current of the two currents for a difference voltage of the differential input voltages as a monitored current.
07/18/13
20130181764
Semiconductor integrated circuit
A constant current source circuit includes one end connected to a second node as sources of third and fourth transistors, and the other end connected to a second power supply node that supplies a second voltage different from a first voltage. The clamp circuit is configured to form a current path between the second node and the second power supply node.
05/23/13
20130127812
Driving circuit of display element and image display apparatus
A new driving circuit is provided. The driving circuit according to the present invention comprises a first period for setting a current to be supplied to a display element, a second period for setting a gray-scale of the display element, and a third period for supplying a driving current to the display element.
05/16/13
20130119235
Solid-state imaging apparatus and method for driving solid-state imaging apparatus
A solid-state imaging apparatus includes: a plurality of pixels each configured to output a signal generated by a photoelectric conversion via a source follower circuit; an output line connected to the plurality of pixels; a current source circuit portion for supplying a current to the output line; and a first amplifier unit configured to clamp a signal from the output line of the pixel at a reset state to a clamping capacitor, and to amplify thereafter the signal from the output line of the pixel at a non-reset state, wherein the current source circuit portion changes from a state of supplying no current to the output line to a state of supplying the current to the output line before a timing of terminating the clamping of the signal.. .
05/02/13
20130106392
Reference current source circuit and system
A reference current source circuit includes a reference voltage generating module, a voltage buffer, an equivalent resistance, a filter capacitor, a current mirror module and a reference current outputting terminal. The voltage buffer includes an operational amplifier and a first fet.
04/25/13
20130099769
Current source circuit with high order temperature compensation and current source system thereof
A current source circuit with high order temperature compensation, includes a reference voltage terminal, a first power module, a second power module, a control module, a current source output module and a bias current source module. The control module includes a first field-effect tube (fet), a second fet, and a third fet.
04/18/13
20130092990
Semiconductor device, display device and electronic device
When writing a signal current from a current source to a current source circuit, noise occurs in some cases in a wiring through which a current flows, which may cause a potential of the wiring to be outside the normal range. As the potential does not turn back within the normal range easily at this time, writing to the current source circuit is delayed.
04/11/13
20130088473
Output circuit, data driver, and display device
An output circuit is capable of supporting a high-speed operation, suppressing power consumption, and controlling its area. The output circuit has a differential input stage, an output amplification stage, and an amplification boost circuit, in which the amplification boost circuit has a differential pair of a second conductivity type and load element pair, and includes a first current source circuit for controlling current supply to an input node of a second current mirror circuit of the differential input stage and boost the charging operation of the output amplification stage according to a voltage difference between input and output voltages, and a second current source circuit for controlling current supply to an output node of a first current mirror circuit of the differential input stage and boost the discharging operation of the output amplification stage..
02/07/13
20130032867
Signal line driving circuit and light emitting device
The invention relates to a signal line driving circuit having a first and a second current source circuits, a shift register, and a constant current source for video signal, in which the first current source circuit is disposed in a first latch and the second current source circuit is disposed in a second latch. The first current source circuit includes capacitive means for converting the current supplied from the constant current source for video signal into a voltage, according to a sampling pulse supplied from the shift register, and supplying means for supplying the current corresponding to the converted voltage..
01/17/13
20130016844
Subsonic test signal generation technique
An apparatus includes a capacitor, a current generating circuit communicatively coupled to the capacitor, and a current pulse timing circuit communicatively coupled to the current source circuit. The current timing pulse circuit is configured to time durations of a first plurality of current pulses from the current generating circuit for charging the capacitor and a second plurality of current pulses for discharging the capacitor, and step the durations of the current pulses between a minimum duty cycle and a maximum duty cycle.


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Current Source Circuit topics: Current Source Circuit, Modulation, Semiconductor, Circuit Board, Semiconductor Device, High Speed, Transmitter, Ground Terminal, Control Unit, Feedback Control, Reference Voltage, Constant Current Source, Calibration, Calibration Circuit, Variable Resistor

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This listing is a sample listing of patent applications related to Current Source Circuit for is only meant as a recent sample of applications filed, not a comprehensive history. There may be associated servicemarks and trademarks related to these patents. Please check with patent attorney if you need further assistance or plan to use for business purposes. This patent data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Current Source Circuit with additional patents listed. Browse our RSS directory or Search for other possible listings.
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