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| Application No. | Application Title | Issue Date |
| 20120126897 | INPUT COMMON MODE CIRCUIT A circuit provides a first current corresponding to the differential input Inn and Inp, and a second current corresponding to the common mode input Vcm. The circuit then mirrors the differential current and the common mode current to a third current and a fourth current... | 05/24/2012 |
| 20120126896 | OFFSET CANCELLATION FOR CONTINUOUS-TIME CIRCUITS One embodiment relates to a continuous-time circuit configured with an offset cancellation loop. The continuous-time circuit includes a multi-stage amplifier chain, including a first amplifier stage and a last amplifier stage, and an offset cancellation loop. The offset... | 05/24/2012 |
| 20120032944 | OPERATIONAL AMPLIFIER CIRCUIT, SIGNAL DRIVER, DISPLAY DEVICE, AND OFFSET VOLTAGE ADJUSTING METHOD Provided is an operational amplifier circuit including a Rail-to-Rail differential amplifier including: first and second differential transistors forming a first differential pair; and third and fourth differential transistors forming a second differential pair, wherein... | 02/09/2012 |
| 20110273233 | MAINTAINING LOOP LINEARITY IN PRESENCE OF THRESHOLD ADJUSTMENT In one embodiment, a method includes receiving, at a filter comprising a Miller amplifier, a differential data signal output by a limiting amplifier (LA), the data signal comprising an output direct current (DC) offset resulting at least in part from a threshold-adjustm... | 11/10/2011 |
| 20110133838 | LOW OUTPUT IMPEDANCE RF AMPLIFIER A radio frequency (RF) power amplifier includes a low impedance pre-driver driving the input of a common-source output amplifier stage. The preamplifier includes a first transistor that has a first terminal coupled to a preamplifier RF input node, a second terminal coup... | 06/09/2011 |
| 20100225395 | Input Buffer With Impedance Cancellation An exemplary negative impedance converting circuit for functioning as a voltage buffer and/or negating the impedance of a connected load. The negative impedance converting circuit includes inputs, outputs, a first transconductance stage and a second transconductance sta... | 09/09/2010 |
| 20100052787 | LIMITING AMPLIFIERS A limiting amplifier with an input stage with dc offset cancellation, identical gain stages, an output buffer and a feedback filter. The input stage receives a differential input signal and outputs a first intermediate differential signal. The gain stages are cascaded t... | 03/04/2010 |
| 20100045381 | LIMITING AMPLIFIERS A limiting amplifier with an input stage with dc offset cancellation, identical gain stages, an output buffer and a feedback filter. The input stage receives a differential input signal and outputs a first intermediate differential signal. The gain stages are cascaded t... | 02/25/2010 |
| 20090289713 | Differential amplifier circuit having offset adjustment circuit A differential amplifier circuit includes an offset adjuster circuit for varying the active load to adjust the offset caused by the differential pair. The differential amplifier circuit includes fine adjustment cell sections including a plurality of transistors having t... | 11/26/2009 |
| 20090153247 | HIGH-SPEED, MULTI-STAGE CLASS AB AMPLIFIERS A multi-stage Class AB amplifier system comprises a first Class AB amplifier circuit that receives an input signal. A bias circuit receives an output of the first Class AB amplifier circuit. A second Class AB amplifier circuit having an input that communicates with an o... | 06/18/2009 |
| 20090115521 | High CMR amplifier topology An amplifier topology includes an input stage comprising a differential pair which conducts respective output currents in response to a differential input signal. Bias current sources provide the pair's tail current and respective bias currents for the input stage in re... | 05/07/2009 |
| 20090079502 | Differential circuit providing a function to cancel input offset voltage A new offset canceling circuit for a differential circuit is disclosed whose input offset voltage may be cancelled independent of the variation of the input level, accordingly, enables the cut-off frequency of the canceling circuit unchanged. The offset canceller of the... | 03/26/2009 |
| 20090072903 | Variable Gain Amplifier Having Variable Gain DC Offset Loop A variable gain amplifier and offset cancellation loop circuit and methods for tracking and correcting DC offset errors that may vary in accordance with the gain of the variable gain amplifier. The circuit is designed to provide tracking of rapid changes in the offset e... | 03/19/2009 |
| 20090058527 | Common Mode Stabilization In A Fully Differential Amplifier A fully differential amplifier circuit provided according to an aspect of the present invention contains a stabilization block to measure the common mode component at the output of an input stage, and to inject a current proportionate to the common mode component into e... | 03/05/2009 |
| 20090045876 | LOW NOISE, LOW POWER, HIGH LINEARITY DIFFERENTIAL AMPLIFIER WITH A CAPACITIVE INPUT IMPEDANCE A low noise, low power differential two-stage amplifier includes a first stage comprising a pair of electrical devices that sense an input signal difference across the pair of electrical devices; and a control feedback loop operatively connected to the first stage, wher... | 02/19/2009 |
| 20090033421 | DIFFERENTIAL INPUT DRIVER USING CURRENT FEEDBACK AND CROSS-COUPLED COMMON BASE DEVICES A differential input driver circuit (10, 50) includes first and second transistors (Q0, Q3) as input transistors and third and fourth transistors (Q1, Q2) as diode-connected, cross-coupled transistors. In one embodiment, first, second,... | 02/05/2009 |
| 20080284513 | FULLY DIFFERENTIAL AMPLIFIER A fully differential amplifier includes: an N-stage amplifier including first to Nth amplifier stages, where N is a positive integer greater than or equal to 2, the first to Nth amplifier stages being cascaded in sequence so as to generate a pair of differential output ... | 11/20/2008 |
| 20080238547 | OFFSET CANCELING CIRCUIT AND OFFSET CANCELING METHOD An offset canceling circuit includes a differential amplifier circuit configured to output a first output signal in response to a differential input signal; a latch circuit configured to hold a second output signal determined based on the first output signal; and an off... | 10/02/2008 |
| 20080218267 | Amplifier with level shifting feedback network An amplifier circuit includes a low noise first stage and a wide dynamic range second stage. A feedback network coupled between the output of the second stage and the input of the first stage provides DC level shifting of the common mode input voltage. The common mode i... | 09/11/2008 |
| 20080197927 | Constant bandwidth DC offset correction in an amplifier According to one embodiment, a system for constant bandwidth DC offset correction in an amplifier includes a number of amplifier stages having an input and an output coupled together in series. The system for constant bandwidth DC offset correction further includes a nu... | 08/21/2008 |
| 20080186098 | CIRCUIT TO PREVENT LOAD-INDUCED DC NONLINEARITY IN AN OP-AMP A circuit for removing non-linearity produced when an amplifier includes a load that results in non-linear current levels is provided. The circuit includes a first transistor element being coupled to one of the differential inputs associated with the amplifier. A second... | 08/07/2008 |
| 20070090878 | Ultra high linearity amplifier The output of a commercially available integrated high gain differential amplifier that already has reasonable linearity is connected back to the (−) input to obtain the well known circuit configuration for a non-inverting amplifier, whose gain may be unity or greater... | 04/26/2007 |
| 20070075776 | Output driver with common mode feedback A complementary metal-oxide semiconductor output driver provides a differential output signal having a particular differential voltage swing and a particular common mode voltage to a differential output node for various types of load circuits coupled to the differential... | 04/05/2007 |
| 20070075777 | Device and method of eliminating DC offset A DC offset elimination device includes a first signal path that delivers a differential input signal pair from an input node to an output node and a second signal path that delivers a differential output signal pair from the output node to the input node. The second si... | 04/05/2007 |
| 20070030069 | Differential amplifier A differential amplifier comprises an operational amplifier, comprising a positive output terminal, a negative output terminal, and a feedback terminal; a common mode sensing circuit coupled to the positive output terminal and the negative output terminal, for generatin... | 02/08/2007 |
| 20070024368 | Differential amplifiers with enhanced gain and dynamic range Differential amplifier embodiments are provided for amplifying input signals with enhanced gain and dynamic range. They include first and second amplifier stages and at least one common-mode feedback circuit that is arranged to mirror and adjust a tail current to contro... | 02/01/2007 |
| 20070001763 | Apparatus and method for canceling DC output offset A transconductor for substantially canceling or reducing a direct current (DC) output offset and a method thereof are provided. The transconductor includes a differential amplifier, a sensing circuit, and a feedback current generation circuit. The differential amplifier... | 01/04/2007 |
| 20060232335 | Method for single-end offset compensation of an operational amplifier The present invention provides a method for single-end compensation of an operational amplifier, which comprises: designing an operational amplifier having a single-end offset style, preparing a common-mode circuit, a switch circuit, a comparator, a digital circuit and ... | 10/19/2006 |
| 20060232336 | Variable-gain differential amplifier A variable-gain amplifier with high input impedance includes positive and negative inputs, positive and negative outputs, first and second differential circuits and first, second and third impedances. The impedances form an impedance bridge between the outputs. The firs... | 10/19/2006 |
| 20060091954 | Method and system for common mode feedback circuitry for RF buffers For a high frequency buffer, a high frequency output path may be isolated from a low frequency feedback path using a common mode feedback loop. The common mode feedback loop may be utilized to adjust an output DC level. The common mode feedback loop may comprise a first... | 05/04/2006 |
| 20060077004 | Low-distortion differential circuit A differential feedback system that minimizes even order distortion of a differential circuit. The feedback system includes a feedback circuit for use with a differential circuit to reduce even-order distortion and dc offset of a difference output signal produced by the... | 04/13/2006 |
| 20060038615 | Differential structure programmable gain instrumentation amplifier In one embodiment, a programmable gain instrumentation amplifier (PGIA) comprises a pair of current conveyors, each current conveyor having a respective sense node and a respective voltage input, with a gain-setting resistor coupled between the respective sense nodes, a... | 02/23/2006 |
| 20050285677 | Fully balanced transconductor A fully balanced transconductor circuit, such as by utilizing two 5 transistor tranconductors in a single circuit sharing the common mode node and operating them 180 degrees out of phase, to realize a current source in saturation under all conditions. The present invent... | 12/29/2005 |
| 20050248406 | System to accelerate settling of an amplifier A system and method are used to accelerate settling or steady state of an amplifier in an amplifier system. This is used to ensure the amplifier reaches steady-state within a specified time period from stand-by or another state without using more current than is needed ... | 11/10/2005 |
| 20050242879 | Transmission arrangement and method for operating an amplifier in a transmission arrangement A transmission arrangement includes a transmitter circuit for subjecting signals for transmission to signal conditioning, the signal output of said transmission arrangement being connected to a power amplifier. The power amplifier is produced in a semiconductor body and... | 11/03/2005 |
| 20050218986 | Differential amplifiers and methods of using same A differential amplifier and method of using same are disclosed. In one particular exemplary embodiment, the present invention may be realized as a circuit comprising a differential amplifier for receiving a differential input signal and generating a differential output... | 10/06/2005 |
| 20050206453 | Common-mode feedback circuit A common-mode feedback circuit is provided for fully-differential operational amplifier stages of a multistage amplifier. A first stage of the circuit establishes a substantially constant current output level for a feedback generating stage of the circuit. An exemplary ... | 09/22/2005 |
| 20050168285 | Output impedance control circuit and control method thereof The invention provides an apparatus and a method for adjusting an output impedance of an output stage. The apparatus comprises a detector for outputting a direct current potential corresponding to the impedance of the output stage circuit. It also comprises a controllin... | 08/04/2005 |
| 20050151589 | Amplifier circuit for capacitive transducers An amplifier circuit for capacitive transducers, such as miniature electret or condenser microphones, wherein the amplifier circuit comprises bias control means adapted to improve settling of the amplifier circuit. Another aspect of the invention relates to a miniature ... | 07/14/2005 |
| 20050140446 | Single-ended-to-differential converter with common-mode voltage control Provided is a circuit to perform single-ended to differential conversion while providing common-mode voltage control. The circuit includes a converter to convert a single-ended signal to a differential signal and a stabilizing circuit adapted to receive the differential... | 06/30/2005 |
