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8183920 |
Variable gain amplifier with reduced power consumption
A variable gain amplifier includes a first common mode (CM) node configured to receive a first differential signal of a pair of differential signals. A first regulator couples to the first CM node,...
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8183921 |
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...
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8179195 |
Current-feedback instrumentation amplifiers
Current-feedback instrumentation amplifiers that include dynamic element matching for the input transconductance amplifiers by periodically swapping the transconductance amplifiers between the...
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8169249 |
Calibrating a system by setting difference between signals
In a signal monitoring system, a circuit includes an input terminal and an output terminal. In addition, a processor coupled to the circuit is operable for calculating a parameter indicative of an...
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8155349 |
Muting control device, muting control method, and muting control program
When controlling the audio signal to the mute mode from an unmute mode, first, the muting circuit switches from the non-attenuating state to the attenuating state to cause the muting circuit to...
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8154337 |
Apparatus and method for automated offset reduction in matched differential input devices
An amplifier includes an input stage, a comparator coupled to an output of the differential input stage, and a trimming controller coupled to an output of the comparator. The input stage includes a...
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8154338 |
Offset cancellation for differential circuits
An offset cancellation circuit for canceling an offset voltage in an amplifier is provided herein. The offset cancellation circuit includes a current source configured to provide an offset current,...
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8149955 |
Single ended multiband feedback linearized RF amplifier and mixer with DC-offset and IM2 suppression feedback loop
A receiver arrangement includes a single ended multiband feedback amplifier, at least one single ended input, differential output mixer arrangement including a main mixer and a trim mixer, and a...
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8149041 |
High-resolution parametric signal restoration
Provided are high-resolution parametric signal restoration systems, and applications thereof. Such systems include a multi-output module and a parametric compensator. The multi-output module...
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8139053 |
Arrangement for canceling offset of driver amplifier circuitry
In an offset canceling arrangement, an offset of an operational amplifier may be canceled even in case capacitive or resistive element is connected outside of the operational amplifier per se, and...
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8138826 |
Apparatus and method for complete elimination of input coupling capacitors in signal amplification
A circuit and method for signal amplification is provided. The circuit includes an amplifier including an input amplifier that is arranged to receive an input analog signal, and to provide an input...
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8120422 |
Ripple reduction loop for chopper amplifiers and chopper-stabilized amplifiers
Ripple reduction loop for chopper amplifiers and chopper-stabilized amplifiers. The ripple reduction loop includes a first chopper, a first amplifier having an input coupled to an output of the...
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8120423 |
OP-AMP sharing with input and output reset
An operational amplifier with two pairs of differential inputs for use with an input switch capacitor network. The operational amplifier has reset devices for resetting the second pair of...
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8115539 |
Operational amplifier
Provided is an operational amplifier capable of correcting an offset voltage of an element to be connected to an input terminal. The operational amplifier includes a main amplifier and an offset...
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8111098 |
Segmented linear FM power amplifier
Various apparatuses and methods for amplifying an FM signal in a segmented linear power amplifier are disclosed herein. For example, some embodiments provide an apparatus including a signal input,...
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8111097 |
Device with reconfigurable continuous and discrete time functionality
A programmable system includes a programmable analog device including an operational amplifier to generate an output voltage based on input voltages at terminals of the operational amplifier. The...
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8102203 |
Offset cancellation in a capacitively coupled amplifier
A method for calibrating an offset voltage of an amplifier used to amplify capacitively coupled communication signals is described. During this process, a common voltage is applied to one or more...
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8102204 |
Amplifiers with input offset trim and methods
Amplifiers with power-on trim and methods using an amplifier system having an amplifier system input and an amplifier system output, an amplifier, a comparator, a successive approximation register...
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8098087 |
Method and apparatus for standby voltage offset cancellation
A method and apparatus is provided for standby voltage offset cancellation at inputs to a comparator within a receiver channel. Each of a first comparator input and second comparator input is...
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8099073 |
Noise reduction in amplifier circuitry using single-sideband chopper stabilization
A multi-path amplifier can include a high frequency path, a low frequency path, and a summing node to sum an output from the high frequency path with an output from the low frequency path. The low...
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8072262 |
Low input bias current chopping switch circuit and method
A chopper-stabilized circuit (1) includes pre-chopping circuitry (26) for chopping an input signal (Vin) at a first frequency to generate a first signal. Input chopping circuitry (9) chops the...
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8072261 |
Power amplifier
A power amplifier based on EER technology or ET technology extracts an amplitude-modulated component from a modulated signal as an input signal which includes the amplitude-modulated component and...
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8044686 |
Comparator circuit for generating binarized data
A comparator circuit according to an embodiment of the present invention includes a comparator configured to compare an input signal voltage with a reference voltage obtained by smoothing the input...
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8031001 |
Differential amplifier, reference voltage generating circuit, differential amplifying method, and reference voltage generating method
A differential amplifier includes a main differential amplifier circuit that receives a pair of input signals and supplies a pair of output signals based on a difference between the input signals;...
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8026761 |
Instrumentation amplifier calibration method, system and apparatus
Calibration of gain and/or offset of an instrumentation amplifier (INA) is accomplished by coupling an appropriate number of current sources, and/or current sinks, respectively, to first and/or...
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8026759 |
Multistage amplifying circuit
A multistage amplifying circuit includes a first amplifying circuit that either samples a first analog voltage input or amplifies a difference between the first analog voltage and a first digital...
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8026760 |
Gain enhanced switched capacitor circuit and method of operation
A switched capacitor circuit utilizes a pair of serially connected differential amplifiers that have plus inputs, minus inputs, plus outputs, and minus outputs. Feedback to the plus/minus inputs is...
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8018274 |
Switched capacitor amplifier circuit with clamping
A system comprises a switched capacitor amplifier including an operational amplifier (opamp). A switching circuit comprises a first switch connected across inputs of the opamp. A second switch is...
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8013671 |
Semiconductor integrated circuit
A semiconductor integrated circuit includes a first input terminal configured to input a first input voltage, a second input terminal configured to input a second input voltage, a differential...
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8013679 |
Operational amplifier
An operational amplifier capable of suppressing power consumption and noise generation includes an offset modifier including a differential amplification circuit, and an offset memory for storing...
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8008968 |
Multipath amplifier
Because of variations in open loop gain and bandwidth in successive approximate register (SAR) analog-to-digital converters (ADCs), designing amplifiers with the desired characteristics is...
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8004353 |
Circuit
A circuit and an adjusting method with a differential amplifier and with a control circuit, wherein the differential amplifier has a first amplifier transistor which for amplifying an input signal...
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7973596 |
Low-noise, low-power, low drift offset correction in operational and instrumentation amplifiers
Low-noise, low-power, low drift offset correction in operational and instrumentation amplifiers and amplifiers using the same are disclosed. The amplifiers disclosed use different combinations of...
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7973684 |
Self auto-calibration of analog circuits in a mixed signal integrated circuit device
Auto-calibration of the analog circuits occurs when requested by a user and/or the occurrence of an event(s). The user may invoke an auto-calibration on demand through an auto-calibration (ACAL)...
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7969342 |
Differential amplifier and data driver employing the differential amplifier
Disclosed is a differential amplifier which includes first and second input terminals, an output terminal, first and second differential pairs, and first and second current sources for supplying...
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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...
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7965208 |
Auto ranging system and method for analog signal
Disclosed herein are embodiments of an auto ranging system and method for an analog signal. A microprocessor is configured to digitally control the programmable gains of an operational amplifier...
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7961042 |
Amplifier circuit and magnetic sensor
An amplifier circuit, includes: a first amplifier; a second amplifier; a first capacitor connected to the first amplifier; a second capacitor having one terminal connected to the first amplifier,...
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7961041 |
System and method for generating a reference voltage
In one embodiment, a circuit having a chopper stabilized amplifier and a network coupled in feedback with the chopper stabilized amplifier is disclosed. The circuit also has a plurality of switches...
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7956679 |
Differential amplifier with offset voltage trimming
A differential amplifier that has a current supply and a differential current to voltage converter with a positive current input node, a negative current input node and a voltage output node, has...
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7956680 |
Low-noise DC offset calibration circuit and related receiver stage
A DC offset calibration circuit has a first resistor, a first switch, a second resistor, and a second switch. The first resistor is coupled to a first supply voltage. The first switch is coupled to...
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7956689 |
Programmable gain amplifier and transconductance compensation system
A programmable gain amplifier (PGA) system comprises selectable parallel transconductors in a front end, independently selectable serial amplification circuits in a back end. The back end is...
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7944287 |
Low-noise, wide offset range, programmable input offset amplifier front end and method
A programmable offset amplifier includes first (M1) and second (M2) input transistors having differentially connected sources and gates coupled to first (Vin+) and second (Vin−) input voltages. A t...
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7944288 |
Switched-capacitor amplifier arrangement having a low input current
An SC amplifier arrangement and a method for measuring an input voltage are described.
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7940105 |
High-resolution parametric signal restoration
Provided are high-resolution parametric signal restoration systems, and applications thereof. Such systems include a multi-output module and a parametric compensator. The multi-output module...
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7924089 |
Offset voltage correction circuit and class D amplifier
A class D amplifier includes an input unit that inputs an input signal and an integrator which includes a differential operational amplifier having an offset voltage correction function. The...
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7924088 |
Offset voltage calibration method and apparatus and amplifier thereof
An offset voltage calibration method is disclosed, which is utilized for calibrating an offset voltage of an electronic device during a calibration period. The offset voltage calibration method...
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7920025 |
Operational amplifier and method of driving liquid crystal display
It was difficult to design an operational amplifier which can cancel an offset to drive a liquid crystal display. An operational amplifier includes: a first differential pair having a first...
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7920022 |
Switched capacitor system with and method for output glitch reduction
A switched capacitor system with output glitch reduction step charges the switched capacitor by switching it to a first voltage level in a first phase, to an intermediate voltage level of a...
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7919992 |
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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