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| Number | Title | Issue Date |
| 8183916 | Non-inverting amplifier and voltage supply circuit including the same A non-inverting amplifier includes an operational amplifier, an input resistor, and a feedback resistor. The operational amplifier amplifies and outputs a difference between an input voltage and a voltage of a control node. The input resistor is connected between a ... | 05/22/2012 |
| 8174312 | Apparatus and method for signal processing of voltage signals from electrodes of a magneto-inductive, flow measuring device Signal processing circuit for voltage signals from electrodes of a magneto-inductive, flow measuring device, wherein two measuring electrodes are connected with a fully differentially working amplifier having two inputs and two outputs. ... | 05/08/2012 |
| 8159292 | Amplifying circuit To efficiently obtain two outputs including one at a normal level and the other at an excessive level. An input signal input to the negative input terminal of an operational amplifier (14) having a negative feedback path is amplified to output an output signa... | 04/17/2012 |
| 8138830 | Variable gain instrumentation amplifier Techniques for providing an instrumentation amplifier having a plurality of selectable gain settings. In an exemplary embodiment, a gain adjustment block for accepting a differential input voltage is coupled to a differential-to-single-ended conversion block for gen... | 03/20/2012 |
| 8125270 | Frequency offset Cartesian feedback system An amplifier system providing improved Cartesian feedback is provided. A complex band pass error amplifier is provided. A quadrature up converter is connected to the complex band pass error amplifier so as to receive as input, output from the complex band pass error... | 02/28/2012 |
| 8115544 | Amplifier circuit and integrated circuit therefor An amplifier circuit on a single die comprises a low voltage amplifier with a first common mode voltage and having an input and an output. A power amplifier has a second common mode voltage whose input is operably coupled to an output of the low voltage amplifier. T... | 02/14/2012 |
| 8111100 | Differential amplifier with improved zero-point calibration The present invention covers novel approaches to the differential amplification of an input signal. Embodiments of the present invention have precise gain, swing to within micro-volts (μV) of ground, and have high CMRR without the need for precision resistors or tu... | 02/07/2012 |
| 7999612 | Operational amplifier having DC offset cancellation capability An operational amplifier includes an input stage for generating a first differential output signal pair according to a first differential input signal pair, an output stage for generating a second differential output signal pair according to at least a second differ... | 08/16/2011 |
| 7965139 | Amplifier offset and noise reduction in a multistage system Conventional multistage amplifiers oftentimes employ trim circuits or highly matched components to combat noise and offset contributions. Having trim circuitry or highly matched components increases the overall size, cost, and power consumption, so it is desirable t... | 06/21/2011 |
| 7952428 | Dynamically adjustable low noise, low power instrumentation amplifier A circuit in accordance with an embodiment of the present invention includes an instrumentation amplifier, a dynamically adjustable low pass filter, at least one monitor and a controller. The instrumentation amplifier includes a pair of buffered operational amplifie... | 05/31/2011 |
| 7952427 | Signal amplifier circuit and optical receiver A signal amplifier circuit includes peak value holding circuit 11 receiving positive-phase input signal, peak value holding circuit 12 receiving negative-phase input signal, adder 13 adding the positive-phase input signal and output signal of pe... | 05/31/2011 |
| 7893759 | Current conveyor based instrumentation amplifier Current conveyor based instrumentation amplifiers are disclosed. Such instrumentation amplifiers may have the higher common mode rejection ratios (CMRR), lower area requirements in integrated circuits, fewer resistors, fewer resistor matching requirements, less nois... | 02/22/2011 |
| 7880541 | Low noise, low power instrumentation amplifier An instrumentation amplifier includes a pair of buffered operational amplifiers that accept a pair of input signals, and a differential operational amplifier that outputs an output signal indicative of a difference between the input signals. A low pass filter provid... | 02/01/2011 |
| 7863977 | Fully differential non-inverted parallel amplifier for detecting biology electrical signal This invention relates to a fully differential non-inverting parallel amplifier for detecting biology electrical signal, including input buffer circuits, differential filter circuits, data selector, non-inverting parallel amplifying circuits and analog-digital circu... | 01/04/2011 |
| 7839212 | Method and apparatus for a high bandwidth amplifier with wide band peaking A two stage fully differential amplifier has been designed which works, in tandem with a TX-FIR, as a linear equalizer at low frequencies, not covered by the TX-FIR, and also acts as a linear amplifier at higher frequencies which are equalized by the TX-FIR. The amp... | 11/23/2010 |
| 7812668 | Multi-input operational amplifier and method for reducing input offset thereof A multi-input operational amplifier comprises two transconductors, two current mirrors, and a current source. Each transconductor generates a current according to a corresponding voltage difference. When the voltage difference is less than or equal to zero, the curr... | 10/12/2010 |
| 7782131 | Balanced amplifier and electronic circuit A balanced amplifier (1) is provided with: a first operational amplifier (11) whose reverse-phase input terminal is connected to an input voltage source (30) and whose reverse-phase input terminal is connected to an output terminal of the first ... | 08/24/2010 |
| 7777565 | Differential amplification circuit and manufacturing method thereof A differential amplification circuit and a method corrects an offset voltage derived from a variance in resistances. With first and second input terminals brought to the same potential and set to a potential different from a reference potential, the resistance value... | 08/17/2010 |
| 7733172 | DC self-biased vacuum tube differential amplifier with grid-to-cathode over-voltage protection A single stage differential amplifier is disclosed as comprising a pair of vacuum tube triodes for amplifying two input signals and generating two output signals. The differential amplifier has DC self-biasing ability and grid-to-cathode over-voltage protection for ... | 06/08/2010 |
| 7701284 | Line driver capable of automatically adjusting output impedance A line driver includes: a differential amplifier for amplifying an input signal to generate an output signal; first and second series resistors coupled respectively to output terminals of the differential amplifier and through which the output signal is output; firs... | 04/20/2010 |
| 7671674 | Amplifier circuit with automatic gain correction The present invention relates to an amplifier circuit and system, and to a method of compensating a gain imbalance generated in a complementary amplifier stage with first and second amplifier means (22, 24) in a bridge configuration. A compensation offset cur... | 03/02/2010 |
| 7616056 | Nauta operational transconductance amplifier Provided is an operational transconductance amplifier (OTA). An existing Nauta transconductor used to implement a high frequency Gm-C filter integrated circuit (IC) is analyzed by a new method and from a new perspective to remove extra components and divide roles of... | 11/10/2009 |
| 7564304 | Audio power amplifier apparatus The invention concerns an audio power amplifier apparatus capable of providing at low manufacturing cost extremely low non-linear distortion, even lower than −120 dB, comprising a main power amplifying section the output of which is series connected to a secondary... | 07/21/2009 |
| 7557651 | Dual transconductance amplifiers and differential amplifiers implemented using such dual transconductance amplifiers Various systems and methods for signal amplification are disclosed. For example, some embodiments of the present invention provide differential amplifiers that include dual transconductance characteristics. Such amplifiers include two dual input operational amplifie... | 07/07/2009 |
| 7521994 | Three-stage amplifier A CMOS output stage operates in A/B push-pull mode and is driven with a control potential (ud) from a preamplifier stage via a control line (st). The control line (st) feeds the gate terminals of a complementary transistor pair (kt), the first transistor (n1)... | 04/21/2009 |
| 7482867 | Single stage balanced voltage amplifier A balanced voltage amplifier is disclosed as comprising a single stage containing three pairs of vacuum tube triodes configured to amplify two input signals (+INPUT, −INPUT) and to generate two output signals (+OUTPUT, −OUTPUT). The balanced voltage amplifier of... | 01/27/2009 |
| 7471145 | Procedure and circuit device for the subtraction of electrical signals The invention relates to a procedure and a circuit device for the subtraction of electrical signals, with at least two regulating loops each comprising at least one amplifier unit. Advantageously, the circuit device comprises a device for subtracting a signal, made ... | 12/30/2008 |
| 7436216 | Method and apparatus for a direct current (DC) coupled input buffer A method and apparatus for combining an alternating current (AC) coupling technique with a low frequency restoration technique to provide AC coupling with low frequency restoration of the attenuated low frequency content. The low frequency restoration circuit operat... | 10/14/2008 |
| 7432766 | Front end for an instrumentation amplifier An amplifier system includes an instrumentation amplifier arrangement being designed to amplify the difference between two voltage inputs with a defined gain, and to produce a single-ended output referenced to a known reference point. A front end circuit is coupled ... | 10/07/2008 |
| 7429893 | Variable-gain amplifier and related method A variable gain amplifier, VGA, and related method are provided. A reference current variably controlled by a control signal is provided, then the reference current is divided to a load current and an input-control current according to differential driving between a... | 09/30/2008 |
| 7420413 | Amplifier circuit of BTL system An amplifier circuit of a BTL system is disclosed, which comprises a first operational amplifier which outputs an output signal having a same phase as an input signal input to a signal input terminal, a second operational amplifier which outputs an output signal hav... | 09/02/2008 |
| 7414466 | Apparatus for reducing offset voltage drifts in a charge amplifier circuit An apparatus for reducing offset voltage drifts in a charge amplifier circuit is disclosed. The apparatus includes a charge amplifier circuit and a bias current compensation circuit. The bias current compensation circuit supplies bias current to lower any offset vol... | 08/19/2008 |
| 7414468 | Amplifier, filter using the same, and radio communication device An amplifier includes an amplification unit which amplify a first difference between first and second input signals, a second difference between second and third input signals and a third difference between third and first input signals by a differential mode gain, ... | 08/19/2008 |
| 7414467 | Circuit configuration having a feedback, fully-differential operational amplifier The present invention relates to a circuit configuration having a feedback operational amplifier (AMP), which is implemented as fully differential, for amplifying an input signal differentially input to the circuit configuration and for outputting the amplified inpu... | 08/19/2008 |
| 7408406 | Mode selection amplifier circuit usable in a signal acquisition probe A mode selection amplifier circuit has multiple differential amplifier circuits coupled to receive input signals A, B and C. Each differential amplifier circuit is selectively operable for generating a signal output representative of an output mode with the output m... | 08/05/2008 |
| 7388959 | Harmonic generator and pre-amp A Harmonic Generator for audio applications and a Pre-Amplifier circuit are combined to form a Harmonic Generator and Pre-Amplifier circuit. The Harmonic Generator is formed from a Buffer Circuit responsive to an input program signal for buffering the input program ... | 06/17/2008 |
| 7382183 | Minimizing switching noise and its effects in auto-zeroed amplifiers Two nulling amplifiers are used with an auto-zeroed differential amplifier. While one nulling amplifier is compensating the main amplifier, the other nulling amplifier is being zeroed for both differential mode (DM) and common mode (CM) offsets. By using two nulling... | 06/03/2008 |
| 7382184 | Amplifier system and method An amplifier system comprises a first amplifier arranged to receive an input signal and a second amplifier arranged to receive a proportion of the input signal. A first potential divider is arranged to receive the output signal of the second amplifier and to feed a ... | 06/03/2008 |
| 7378905 | Differential driver circuit A current-saving differential wideband driver circuit comprises a differential input amplifier for amplifying a differential input signal to produce a differential intermediate signal being comprised of a first intermediate signal and a second intermediate signal, a... | 05/27/2008 |
| 7375587 | Variable-gain amplifier with high linearity as to gain variations A variable-gain amplifier includes an amplifier stage; an attenuating network receiving an input signal; a plurality of transconductance stages, connected between respective nodes of the attenuating network and the amplifier stage, wherein each of the transconductan... | 05/20/2008 |
