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7605647 |
Chopper-stabilized amplifier and magnetic field sensor
A chopper-stabilized amplifier has switching networks arranged to support a high frequency clocking signal and to provide a high common mode rejection and a high rejection of an offset component of...
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7605646 |
Low glitch offset correction circuit for auto-zero sensor amplifiers and method
An instrumentation amplifier includes first ( 11 A) and second ( 12 A) input amplifiers having outputs ( 15 A,B) coupled to an output amplifier ( 13 ). A first auto-zero stage ( 20 ) in the first...
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7602237 |
Amplifying circuit
In an amplifying circuit, a first and a second switches are provided between an input terminal and output terminal of coupling capacitor and amplifier, and these switches are set in OFF state in a...
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7598801 |
Voltage regulator, voltage regulating method thereof and voltage generator using the same
A voltage regulator and a voltage regulating method thereof and a voltage generator using the voltage regulator are disclosed by the present invention. The voltage regulator of the present...
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7595648 |
Device and method for reading a capacitive sensor, in particular of a micro-electromechanical type
A read device of a capacitive sensor includes: a signal source supplying an electrical read signal for driving the capacitive sensor; and a discrete-time sense circuit for generating an electrical...
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7589587 |
Feedback amplifier circuit operable at low voltage by utilizing switched operational amplifier and chopper modulator
In a feedback amplifier circuit, a first switching device executes an auto-zero operation by inputting a signal outputted from an amplifier to an input terminal of the amplifier during an auto-zero...
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7586368 |
Simultaneous filtering and compensation circuitry and method in chopping amplifier
A chopper-stabilized amplifier ( 1 B) having a first output ( 25 ) includes an input chopper ( 9 ) for chopping an input signal and applying it to the input of a first amplifier ( 2 ) and an output...
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7583166 |
Inductor Q factor enhancement apparatus has bias circuit that is coupled to negative resistance generator for providing bias signal
The present invention provides an apparatus for enhancing Q factor of an inductor. The apparatus includes a negative resistance generator coupled to the inductor for providing a negative...
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7579885 |
Charge recycling amplifier for a high dynamic range CMOS imager
A high dynamic range amplifier circuit for amplifying pixel signals of an imager device is disclosed. The amplifier circuit uses a read-out scheme based on a charge recycling approach, where a...
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7576603 |
Arrangement for canceling offset of an operational amplifier
Operational amplifier circuitry drives a device which may be run with a combination of output signals fewer in number than the output signals delivered from plural output circuits. Each output...
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7576602 |
Circuit utilizing op-sharing technique and related method thereof
The present invention provides a circuit that utilizes OP-sharing technique. The circuit includes an amplifier, a first application circuit, a second application circuit, and a reset circuit. The...
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7573334 |
Bias control circuitry for amplifiers and related systems and methods of operation
Embodiments of the invention comprise methods, apparatuses and systems for a dynamic bias control circuit configured to dynamically bias an amplifier. The dynamic bias control circuitry includes...
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7573327 |
Autozeroing current feedback instrumentation amplifier
An embodiment of the present invention is directed to an instrumentation amplifier. The amplifier includes a first amplification sub-circuit, which includes an input stage for sensing a...
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7567121 |
Current-mode instrumentation amplifier error reduction circuit and method
A current-mode instrumentation amplifier (IA) error reduction circuit and method employs a current-mode IA topology and an auto-zero circuit. The IA receives a differential voltage (VINP−VINN)...
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7564310 |
Amplifier for improving electrostatic discharge characteristic
An amplifier for improving an electrostatic discharge (ESD) characteristic includes an operational amplifier, a first resistor circuit, a first fuse box, a second resistor circuit, and a second...
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7560969 |
Receiver of high speed digital interface
A receiver of a high speed digital interface includes at least one differential amplifier, a pair of resistive elements, a current source and a pair of transistors. The differential amplifier...
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7557650 |
Electronic signal generator with modulated cyclic ratio, compensated for variations in its power supply voltage
A generator capable of supplying one or more output signals with a modulated cyclic ratio includes one or more formatting circuits each processing one input signal and one or more class D...
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7557649 |
DC offset cancellation circuit and programmable gain amplifier using the same
In a DC offset cancellation circuit, an operational amplifier is provided with an inverse terminal, a non-inverse terminal and an output terminal. A first resistor is connected to the non-inverse...
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7557648 |
Operational amplifier, integrating circuit, feedback amplifier, and controlling method of the feedback amplifier
An operational amplifier according to an embodiment of the present invention includes: an operational amplifier stage executing differential-amplification of an input voltage and a reference...
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7554389 |
Differential amplifier and digital-to-analog converter
A differential amplifier comprises first, second, and third input terminals ( 1, 2, and 3 ), output terminal ( 4 ), first and second differential pairs ( 531 and 532 ) ( 533 and 534 ) driven...
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7538606 |
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...
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7538605 |
Amplifier device capable of reducing offset voltage
An amplifier device capable of reducing offset voltage includes an offset-voltage cancellation device, an input stage circuit, an output stage circuit, a pseudo output stage circuit, a switch...
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7538604 |
Amplifier feedback switch configuration with improved PSRR
A circuit including a first sensitive node, a first component connected between the first sensitive node and a first terminal of a first switch, said first switch controlled by a first control...
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7538595 |
DC offset canceling circuit
The present invention provides a $ for canceling DC offset, comprising: a first circuit accumulating a first square value of a plurality of signal values in a time period; a second circuit...
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7535302 |
Operational amplifier and display device
To reduce the apparent effect of offset voltage by making the offset voltage spatially scattered. An operational amplifier 1 includes: a first differential pair having N-channel MOS transistors...
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7535295 |
Chopper stabilized amplifiers combining low chopper noise and linear frequency characteristics
Chopper stabilized amplifiers combining low clock noise and linear frequency characteristics. The chopper stabilized amplifiers are used in offset correction circuitry, with the output of the...
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7535294 |
Offset cancellation amplifier, display employing the offset cancellation amplifier and method for controlling the offset cancellation amplifier
An offset cancellation amplifier where during a first period of a data output period, an output voltage and a reference voltage are supplied to the gates of a first differential pair, and the...
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7535293 |
Preamplifier circuits and methods of calibrating an offset in the same
A preamplifier circuit includes a differential amplifying unit, an offset detection unit and a reference signal generation unit. The differential amplifying unit compares an input signal pair with...
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7532065 |
Analog amplifier having DC offset cancellation circuit and method of offset cancellation for analog amplifiers
An amplifier having DC offset compensation includes at least one input node and a pair of differential output nodes, a biasing circuit coupled to the input node; and a plurality of current sources....
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7528654 |
Analog transconductance amplifier
An analog transconductance amplifier includes an input stage including a first transistor and a second transistor connected in series to the first transistor. The first and second transistors are...
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7525375 |
Method of correcting the output signal of an analog amplifier, amplifier module and measuring device
A method is disclosed for correcting transfer errors of an analog amplifier that occur following a jump in the amplifier input signal caused by switching. A measuring device includes at least one...
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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...
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7518443 |
Amplifier circuit and method for reducing voltage and current noise
An amplifier circuit with current noise reduction employs first and second variable impedance devices between a signal source and an amplifier. A modulation frequency generator establishes a...
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7518440 |
Dual path chopper stabilized amplifier and method
A dual path chopper-stabilized amplifier ( 100 ) includes first ( 11 ) and second ( 11 A) chopping/notch-filtering paths, each including an input chopper ( 9,9 A), a transconductance amplifier (...
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7518439 |
High precision gain amplifier without precision passive components
An amplifier circuit uses capacitor as voltage sources so that the amplifier can achieve high precision gain without either ratioed capacitors or absolute value of capacitors or resistors. In one...
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7514978 |
Terminated input buffer with offset cancellation circuit
A system and method for compensation of offset voltage in a digital differential input buffer driven by a terminated transmission line. Offset compensation currents are injected at the output of...
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7511577 |
DC coupled microwave amplifier with adjustable offsets
An output amplifier stage covers a flat frequency range of DC to microwave frequencies with provisions for independent control of input and output DC offset. The output amplifier stage includes a...
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7511549 |
Compact high-speed, high-resolution comparator structure
Methods and circuits for performing high-speed, high-resolution signal comparisons using offset cancellation, reduction of charge injection noise, and sharing of coupling capacitors between circuit...
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7508258 |
Amplifier circuit
Provided is a chopper amplifier circuit capable of eliminating an influence of a slew rate of an amplifier and suppressing spike generation to thereby obtain an output signal having little harmonic...
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7504882 |
Differential amplifier circuit and semiconductor device
A differential amplifier circuit in which an input offset voltage is very small. The differential amplifier circuit includes an input-stage differential amplifier section and a cascode-connected...
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7501873 |
Digitally controlled threshold adjustment circuit
Embodiments of threshold adjustment circuits are disclosed. An example circuit includes a first differential pair of first and second thin oxide transistors. The first and second thin oxide...
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7499676 |
Low voltage differential signaling transceiver
A low voltage differential signaling transceiver includes a transmitter and a receiver, the transmitter having a first terminal in signal communication with a transmission line, a source resistance...
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7498875 |
Technique to improve the gain and signal to noise ratio in CMOS switched capacitor amplifiers
The present invention comprises switched capacitor amplifiers including positive feedback on semiconductor devices, wafers, and systems incorporating same and methods for amplifying signals using...
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7498874 |
Glitch-free start-up with a tracking pin
An error amplifier for closed loop operation is provided. The error amplifier has a track input and a feedback input. During soft-start, a voltage offset is added to the error amplifier input. In...
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7489187 |
Operational amplifier and related noise separation method thereof
An amplifier includes: an input stage for receiving an input signal to generate a first signal corresponding to a first band; a first modulator coupled to the input stage for modulating the first...
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7486137 |
System and method for power amplifier output power control
An architecture for detecting amplifier power is provided. The architecture includes a voltage envelope detector that receives a voltage signal and generates a voltage envelope signal. A current...
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7482864 |
Method and system for FET-based amplifier circuits
Amplifier circuits and methods are implemented using a variety of different embodiments. According to one such embodiment, an amplifier circuit is implemented to amplify a first signal to drive an...
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7479826 |
Chopper amplifier circuit and semiconductor device
Provided is a chopper amplifier circuit capable of reducing an offset voltage of a sensor bridge and temperature characteristics of the offset voltage. An offset adjusting voltage generation...
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7466204 |
Differential amplifier circuit, operational amplifier circuit, light-receiving amplifier circuit using the same, function selection circuit, and light-receiving circuit using the same
A differential amplifier circuit, an operational amplifier circuit, and a light-receiving amplifier circuit using the same are provided, by which the influence of an on resistance of an analog...
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7466194 |
DC offset mitigation in a single-supply amplifier
An amplifier is described which includes a first loop including a first amplifier stage having an offset voltage associated therewith. An output stage includes two switching devices in a bridge...
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