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| Number | Title | Issue Date |
| 7710196 | AC differential connection assembly between a trans-impedance amplifier and a post amplifier for burst mode receiving An AC differential connection assembly between a trans-impedance amplifier and a post amplifier for burst mode receiving comprising means for coupling a differential output of the trans-impedance amplifier to a differential input of the post amplifier, the means for... | 05/04/2010 |
| 7679432 | Operation amplifier and circuit for providing dynamic current thereof An operation amplifier (op-amp) and a circuit for providing dynamic current thereof are disclosed. The circuit can be applied to any current op-amp. The circuit comprises two transistors which are simultaneously or non-simultaneously turned on as the input signals r... | 03/16/2010 |
| 7586367 | Current sensor device A current sensor senses the current at a sense transistor and generates an output current that is an accurate proportional representation of the current at the sense transistor. Furthermore, the sensed current is relatively independent of the resistive load of the f... | 09/08/2009 |
| 7414462 | Differential receiver circuit A differential receiver circuit receives a differential input signal including first and second input signals (DP, DM) and generates a single-ended output signal. The receiver circuit includes first and second comparators that receive the differential input signal a... | 08/19/2008 |
| 7414441 | Output buffer circuit An output buffer circuit includes an input stage of which one end receives an input voltage and the other end receives an output voltage; a class AB output stage that increases a current flowing in the output stage when the difference between the input and output vo... | 08/19/2008 |
| 7403063 | Apparatus and method for tuning center frequency of a filter A tuning method and a tuning apparatus for tuning a filter are disclosed. The tuning method includes: configuring the filter as a VCO; utilizing the VCO to generate an oscillation signal according to a driving signal; comparing a frequency of the oscillation signal ... | 07/22/2008 |
| 7394857 | Flexible versatile low-cost wireline transmit driver A versatile, programmable, low-cost transmit line driver is provided. The line driver includes a digital-to-analog converter that receives a digital input and provides an analog output. The line driver is reconfigurable between the voltage mode of operation. ... | 07/01/2008 |
| 7394310 | System and method for programmable switching characteristics of an analog switch in a transconductance amplifier Provided are a method and system for controlling impedance in a transconductance amplifier. A system includes a first transconductance amplifier and a second transconductance amplifier configured to control electrical characteristics associated with the first transc... | 07/01/2008 |
| 7358742 | DC & AC coupled E-field sensor A method and apparatus is shown for detecting with high sensitivity by allowing the operation of an e-field amplifier without a DC bias resistor shunt with the amplifier input. E-fields produced by an approaching body, or changing E-field of the background, turn on ... | 04/15/2008 |
| 7345528 | Method and apparatus for improved clock preamplifier with low jitter A clock signal preamplifier comprises complementary pairs of differentially coupled transistors, with an output signal coupled to an inverter further comprising a totem-pole arrangement of complementary MOSFET transistors. The input signal to the preamplifier is typ... | 03/18/2008 |
| 7342526 | Digital-to-analog converter using plural transistors having the same operating characteristics A digital-to-analog converter converts a digital input signal into an analog signal. The digital-to-analog converter includes: a power-supply unit for outputting voltages of different magnitudes through plural output terminals thereof; plural switches connected to t... | 03/11/2008 |
| 7295059 | System and method for common mode bias for high frequency buffers Methods and systems for reducing parasitic capacitance of a buffer for an electric circuit are disclosed herein. Aspects of the method may comprise coupling a gate of a first transistor to a first differential input of the buffer and coupling a gate of a second tran... | 11/13/2007 |
| 7262641 | Current differential buffer The present technique relates to a method and apparatus for operating a differential buffer. In the differential buffer, a first stage may include a differential pair configured to receive input signals and generate output signals. The first stage may also include a... | 08/28/2007 |
| 7250791 | Current feedback amplifiers Current feedback amplifiers circuits that generate common mode (CM) and/or differential mode (DM) currents are provided herein. This description is not intended to be a complete description of, or limit the scope of, the invention. Other features, aspects, and objec... | 07/31/2007 |
| 7239198 | Single gate oxide differential receiver and method An integrated differential receiver includes a single gate oxide differential receiver and an associated switchable voltage supply circuit. The integrated differential receiver determines the desired receiver supply voltage and selects a supply voltage for the singl... | 07/03/2007 |
| 7227420 | Transimpedance amplifier with a high gain/bandwidth product for conversion of a DAC output current The two output currents (INP, IN) which are produced by a current source digital/analog converter (DAC) are supplied to the two halves of a symmetrical transimpedance amplifier. The input current (INP, IN) is supplied to a first stage, which is formed by a first tra... | 06/05/2007 |
| 7190931 | Receiver calibration apparatus, method, and system A receiver is calibrated using a transmitter that can output a plurality of substantially constant amplitude signals. ... | 03/13/2007 |
| 7187214 | Amplifier circuit having constant output swing range and stable delay time Provided is an amplifier circuit having a constant output swing range and a stable delay time, where the amplifier circuit includes a first bias unit, a second bias unit, a comparison unit, and an amplifier unit, and the first bias unit responds to an internal refer... | 03/06/2007 |
| 7173482 | CMOS regulator for low headroom applications A complementary metal oxide semiconductor (CMOS) voltage regulator for low headroom applications includes a differential input common mode range amplifier. The differential input common mode range amplifier is formed by a plurality of CMOS transistors. A source foll... | 02/06/2007 |
| 7132860 | Differential-mode current feedback amplifiers Amplifier circuits that generate CM currents are provided. Amplifier circuits that generator DM currents are also provided. Fully differential current feedback amplifier circuits with separate CM and DM inputs are also provided. Such amplifier circuits combine the b... | 11/07/2006 |
| 7132859 | Common-mode current feedback amplifiers Amplifier circuits that generate CM currents are provided. Amplifier circuits that generator DM currents are also provided. Fully differential current feedback amplifier circuits with separate CM and DM inputs are also provided. Such amplifier circuits combine the b... | 11/07/2006 |
| 7116132 | Current feedback amplifiers with separate common-mode and differential-mode inputs Amplifier circuits that generate CM currents are provided. Amplifier circuits that generator DM currents are also provided. Fully differential current feedback amplifier circuits with separate CM and DM inputs are also provided. Such amplifier circuits combine the b... | 10/03/2006 |
| 7106136 | Amplifier, data driver and display apparatus having the same An amplifier includes a biasing section, first and second differential amplifying sections and an output section. The biasing section outputs first and second bias currents based on first and second power source voltages. The first differential amplifying section ou... | 09/12/2006 |
| 7102612 | Power-saving circuits and methods for driving active matrix display elements A power-saving circuit for an active matrix liquid crystal display (“LCD”) panel that comprises a plurality of first capacitors, each first capacitor corresponding to a data line of the LCD panel for collecting electrical charge provided on an associated data li... | 09/05/2006 |
| 7098904 | Display control circuit and display device A display control circuit (100) that may have a reduced power consumption has been disclosed. A display control (100) may include a plurality of output cells (3-1 to 3-N). Each output cell may include an amplifying circuit (35 | 08/29/2006 |
| 7091783 | Rejection circuitry for variable-gain amplifiers and continuous-time filters Variable-gain amplifiers (VGAs) and/or continuous-time filters (CTFS) are implemented with circuitry that provides improved power-supply rejection. The power-supply rejection circuitry may include a current source and a diode-connected MOSFET that inhibit noise in t... | 08/15/2006 |
| 7057438 | Output circuit and semiconductor integrated circuit incorporating it therein An output circuit is provided for outputting, based on a first drive signal, an output signal with an amplitude smaller than a source voltage, comprising: a first type MOS transistor whose gate is impressed with a first drive signal and whose drain outputs a signal;... | 06/06/2006 |
| 7053698 | Methods for extracting the mean (common mode) voltage of two input signals Methods and circuits for extracting a true mean of two signals are provided. A first amplifier input stage (e.g., an n-type stage) is operated when a mean of the two signals approaches an upper rail voltage. A second amplifier input stage (e.g., a p-type stage) is o... | 05/30/2006 |
| 7038538 | Folded cascode high voltage operational amplifier with class AB source follower output stage An operational amplifier comprises multiple stages. A differential input stage that includes an adaptive high voltage differential pair generates up and down output currents in response to up and down input voltages. The differential input stage includes adaptive co... | 05/02/2006 |
| 7015750 | Method for lowering noise and providing offset correction in a transimpedance amplifier A system for receiving signals (e.g., optical signals) includes an input device, an amplification device, and a feedback device. The amplification device receives a signal from the input device and includes a transimpedance portion. The transimpedance portion includ... | 03/21/2006 |
| 7012465 | Low-voltage class-AB output stage amplifier A programmable, rail-to-rail, low-voltage, micro-power harmonic-mean class-AB output stage with MOS devices employed in weak inversion is provided. The output stage MOS devices are arranged in the translinear loop, which avoids having a plurality of MOS devices in s... | 03/14/2006 |
| 7012463 | Switched capacitor circuit with reduced common-mode variations A circuit with a common-mode dual output includes a feedback circuit connected to alternate the states of the dual output between an average output level and a desired common-mode level. The difference between the average and desired levels is proportional to a sign... | 03/14/2006 |
| 7010637 | Single-ended memory interface system A system for interfacing over a multi-drop bus comprising a single-ended control interface coupled with a first power supply, and a common supply and a plurality of single-ended memory interfaces coupled with a second power supply, the common supply and coupled dire... | 03/07/2006 |
| 6992525 | Arrangement in a pulse amplifier A pulse amplifier implemented in standard CMOS, comprises a control circuit for controlling a driver stage for driving a class D output stage that comprises a first PMOS-transistor and a first NMOS-transistor with interconnected drain contacts. A driver stage compri... | 01/31/2006 |
| 6970124 | Inherent-offset comparator and converter systems Comparator systems are provided that include first and second differential pairs of transistors with inherent offsets that are a function of their tail currents. Some system embodiments configure the pairs to have substantially-equal, nonzero inherent offset voltage... | 11/29/2005 |
| 6954090 | Charge pump having reduced switching noise A low power charge pump is provided that has complementary transistors capable of isolating switching noise from the input switching transistors. The charge pump uses charged currents that are matched in both magnitude and time to reduce switching noise in the outpu... | 10/11/2005 |
| 6952134 | Protection circuit for extending headroom with off-chip inductors A protection circuit for extending the dynamic range of an amplifier circuit is described. Off-chip impedances, such as inductors, cause the output of the circuit to swing above and below the bias voltage. A protection circuit is included, either on-chip or off-chip... | 10/04/2005 |
| 6927618 | Electric circuit A transistor has variation in a threshold voltage or mobility due to accumulation of factors such as variation in a gate insulating film which is caused by a difference of a manufacturing process or a substrate to be used and variation in a crystal state of a channe... | 08/09/2005 |
| 6882183 | Multi-level output circuit In a multi-level output circuit, an amplifier circuit amplifies a constant input voltage and outputs the amplified constant input voltage. The multi-level output circuit is capable of selectively outputting signals of different levels by switching the gain of the am... | 04/19/2005 |
| 6882218 | Transimpedance amplifier and offset correction mechanism and method for lowering noise A system for receiving signals (e.g., optical signals) includes an input device, an amplification device, and a feedback device. The amplification device receives a signal from the input device and includes a transimpedance portion. The transimpedance portion includ... | 04/19/2005 |
