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| Number | Title | Issue Date |
| 7924188 | Rapid recovery circuit When a semiconductor circuit, in which a stabilizing capacitor 2 for stabilizing a reference voltage Vbias is connected to a reference voltage terminal RT, recovers from a power down state to an operational state, a current mirror circuit 40 provides c... | 04/12/2011 |
| 7911366 | Gray code current mode analog-to-digital converter One embodiment of the present invention is a Gray code current-mode analog to digital (ADC) converter using a Gray code current-mode ADC building block. The Gray code current-mode ADC building block can produce a Gray code bit and a current output that is sent to a ... | 03/22/2011 |
| 7843372 | D/A conversion circuit In an mode of this invention, a digital/analog conversion circuit, includes: a digital/analog conversion portion which outputs a first current according to an input digital signal; and a first current mirror circuit which generates a mirror current according to the ... | 11/30/2010 |
| 7733254 | Sample and hold circuit for a current mode pipelined analog-to-digital converter A pipelined current mode analog-to-digital converter, including: a plurality of stages each having a first sample and hold circuit configured to receive an analog signal having a current; the sample and hold circuit having at least first and second outputs; the firs... | 06/08/2010 |
| 7701370 | Current output circuit with bias control and method thereof A current output circuit with bias control and a method thereof are provided. The current output circuit includes a current mirror circuit comprising a first transistor and a second transistor having respectively two drains, and a control circuit coupled to the curr... | 04/20/2010 |
| 7629908 | D/A conversion circuit, organic EL drive circuit and organic EL display device A D/A converter of the current switching type has a first current mirror circuit that D/A converts the upper (n−m) digits in n bit data to be converted and a weighting current circuit block or a second current mirror circuit that D/A converts the lower m digits in... | 12/08/2009 |
| 7545297 | Digital-to-analog converter using dual-gate transistors A digital to analog converter. The digital to analog converter including a current mirror comprising N stages, each stage comprising 2n−1 dual gate transistors where N is a positive integer equal to or greater than one and n is an integer between 0 and ... | 06/09/2009 |
| 7545298 | Design structure for a digital-to-analog converter using dual-gate transistors A design structure embodied in a machine readable medium, the design structure including a current mirror including N stages, each stage comprising 2n−1 dual gate transistors where N is a positive integer equal to or greater than one and n is an integer... | 06/09/2009 |
| 7456767 | D/A converter circuit, organic EL drive circuit, and organic EL display A D/A converter circuit includes a first current mirror circuit and a second current mirror circuit. The first current mirror circuit has a plurality of output side transistors provided correspondingly to digits of data to be converted and generates en analog curren... | 11/25/2008 |
| 7446683 | Digital current source A digital current source used to mirror a reference current is provided. The digitally controlled analog current source multiplies a current from a master mirror transistor producing an output current that is a digitally controlled multiple of the reference current.... | 11/04/2008 |
| 7443327 | Current-output type digital-to-analog converter Source potentials of n output transistors are fixed by common fixed voltage, and sources are connected to a current output terminal. A drain and a gate of an input transistor are commonly connected to the drains and the gates of the output transistors respectively. ... | 10/28/2008 |
| 7425909 | Low-noise programmable current source A low-noise programmable current source includes an output digital to analog converter for providing an output load current; and a control circuit, responsive to an input defining a predetermined load current for generating, for the digital to analog converter, a co... | 09/16/2008 |
| 7420492 | Current range control circuit, data driver, and organic light emitting display A current range control circuit for a data driver in an organic light emitting display. The data driver includes a shift register for outputting a latch control signal, a data latch for sequentially receiving video data and to output the video data in parallel, a di... | 09/02/2008 |
| 7391266 | Serial link output stage differential amplifier and method Protection for the transmission of higher amplitude outputs required of differential amplifiers formed by thin oxide transistors with limited maximum voltage tolerance used where compliance with communication protocol standards requires handling voltages which may, ... | 06/24/2008 |
| 7382305 | Reference generators for enhanced signal converter accuracy Reference generator embodiments are provided with low output impedances to enhance reference stability in the presence of varying loads. The generators are structured to provide these impedances in an efficient manner (i.e., with low supply currents) and also to pro... | 06/03/2008 |
| 7382308 | Reference buffer using current mirrors and source followers to generate reference voltages A reference buffer includes a first current mirror, a second current mirror, a first source follower coupled in series to a branch of the first current mirror and receiving a first initial reference voltage and outputting a first reference voltage, a second source f... | 06/03/2008 |
| 7372388 | A/D converter, A/D converter control method, and A/D converter connection method The present invention is intended to provide an A/D converter making it possible to reduce the power consumption of an output interface. The A/D converter includes an output current value designation register that holds a value sent from an upper-level unit, and an ... | 05/13/2008 |
| 7362249 | Current range control circuit, data driver, and organic light emitting display Embodiments of a current range control circuit, data driver and organic light emitting display are disclosed, wherein the current range control circuit is configured to adjust a range of an input current in the data driver according to a type of display device. One ... | 04/22/2008 |
| 7355577 | Linear DAC in liquid crystal display column driver A method and circuit for providing analog voltages to an LCD panel based on digital voltages. A gamma curve defining a relationship between the applied voltage and a luminescence of the liquid crystals is implemented in a timing controller through a look-up table, a... | 04/08/2008 |
| 7339508 | Digital to analog converter with shared calibration The invention provides a multi-channel DAC circuit which provides for correlation between selected ones of the multiple channels such that a single set of calibration coefficients may be used for calibration of multiple channels. ... | 03/04/2008 |
| 7332965 | Gate leakage insensitive current mirror circuit A gate leakage insensitive current mirror circuit including an input stage, an output stage, and a pair of complementary source followers. The pair of complementary source followers is connected between the input stage and the output stage. In operation, the input s... | 02/19/2008 |
| 7321326 | Current source cell and D/A converter using the same A current source cell of one embodiment according to the present invention comprises: first and second transistors which are complementarily switched by a control signal; a constant current source which is commonly connected to one ends of current paths of the first... | 01/22/2008 |
| 7292172 | Current driven D/A converter and its bias circuit A current driven D/A converter sets an OFF control voltage (BIAS3) for turning off NMOS transistors M12P, M12N, M22P, M22N, M32P and M32N at a voltage close to an ON control voltage (BIAS2). This makes it possi... | 11/06/2007 |
| 7292167 | Apparatus for error compensation of self calibrating current source An apparatus for error compensation of a self calibrating current source adapted for compensating errors of at least one self calibrating current source. The compensation apparatus includes an imitative self calibrating current source, a current source reference app... | 11/06/2007 |
| 7285992 | Amplifier with charge-pump generated local supplies An amplifier system includes a follower-type output stage that is driven by a pre-driver circuit. The follower-type output stage that is operated from VCC and GND (or VEE) power supplies. The pre-driver circuit for the follower output stage is operated from local po... | 10/23/2007 |
| 7256722 | D/A converter A high accuracy D/A converter includes D/A converter sections including 64 current cells for outputting a current corresponding to 1 LSB of 8-bit input data and a D/A converter section including 63 current cells, a reference current generating section for supplying ... | 08/14/2007 |
| 7250883 | A/D converter A compact and highly accurate A/D converter includes series-connected computation cells, the number of which is equal to the number for bits in an output signal. The first computation cell includes a first comparison unit for subtracting a reference current from a f... | 07/31/2007 |
| 7221702 | Transmitter/receiver for bidirectional communications In a transmitter/receiver for bidirectional communication with a transmission medium, the transmitter comprises an amplifier having an input terminal for signals to be transmitted, an output stage with output terminals coupled via resistors to the transmission mediu... | 05/22/2007 |
| 7202881 | Color image display device, method of driving the same, and electronic equipment A gray-scale power supply line supplied to a source signal line driving circuit is made only one system, and each of D/A conversion circuits drives source signal lines in which three source signal lines corresponding to RGB are made a unit and the number of which is... | 04/10/2007 |
| 7196555 | Apparatus and method for voltage conversion An apparatus includes an input port, an output port, a resistor, and a current amplifier. The current amplifier includes an input circuit and an output circuit. The resistor is coupled to the input port. The input circuit is coupled to the resistor and the output ci... | 03/27/2007 |
| 7193554 | Quantizer circuit According to an aspect of present invention, a quantizer is provided with reduced power consumption and area. Such a feature is attained by providing the input signal and a reference signal on input terminals of a pre-amplifier, and coupling the differential output ... | 03/20/2007 |
| 7193827 | Single-sensor microcontroller-based approach for ground fault circuit interrupters A microcontroller-based temperature compensated circuit for ground-fault circuit interrupter to meet the requirements of UL 943 using a single sensor to detect both ground-fault and grounded-neutral fault conditions in both full-wave and half-wave AC power supplies ... | 03/20/2007 |
| 7180479 | Signal line drive circuit and light emitting device and driving method therefor The variation of characteristics of transistors occurs. The present invention is a signal line drive circuit having a plurality of current source circuit corresponding to a plurality of wirings, a first and a second shift registers, a latch circuit, the foregoing pl... | 02/20/2007 |
| 7157895 | Systems and methods for generating a current Systems and methods are provided for generating a current. A first current source generates a first current based on a first current selection signal, and a second current source generates a second current that is a multiple of the first current in response to selec... | 01/02/2007 |
| 7145493 | Digital-to-analog converter (DAC) circuits using different currents for calibration biasing and methods of operating same A DAC circuit can include a plurality of current source circuits configured to operate responsive to respective different bias voltage signals and respective true and complementary binary digit signals. ... | 12/05/2006 |
| 7135912 | Methods and systems for decoupling the stabilization of two loops Circuits and methods for dynamically stabilizing a circuit having a relatively small capacitive load two current loop sub circuits are provided. A main current loop and an associated sensing loop are coupled such that a compensation capacitance supplied to each sub ... | 11/14/2006 |
| 7132966 | Floating point IDAC Circuits and methods to convert a digital floating-point number into an analog current have been achieved. The conversion is performed directly by using an exponential current digital-to-analog converter (DAC) and a cascaded linear current digital-to-analog converte... | 11/07/2006 |
| 7129878 | Digital to analog converter A digital to analog converter for an analog Liquid Crystal Display (LCD) includes a digital inlet, a latching circuitry, a voltage level shifter circuitry, a switching circuitry, and a resistance network with a resistance compensatory circuitry. The resistance netwo... | 10/31/2006 |
| 7129871 | Digital-to-analog converter with programmable current control A wide gain range current digital-to-analog converter (DAC) is presented that includes a unit current cell having a current source module biased by a current source voltage bias, a differential switch module, a main cascode module biased by a first bias voltage and ... | 10/31/2006 |
| 7124309 | Method, system, and apparatus for an efficient power dissipation A processor that includes a digital throttle to monitor the activity of the execution pipeline and to change a frequency of a first or second PLL clock within a single clock cycle based on a power state. ... | 10/17/2006 |
