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7622994 |
Bias circuit with increased power supply rejection
According to one exemplary embodiment, a power supply rejection bias circuit includes a first amplifier coupled to a second amplifier, where the first amplifier receives a reference voltage, and a...
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7609112 |
Boosted tail-current circuit
A circuit includes a pair of input transistors configured as a differential pair and having input terminals configured to receive an input voltage. The circuit also includes a first current source...
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7605657 |
Multi-mode amplifier arrangement and method for controlling an amplifier arrangement
A multi-mode amplifier arrangement comprises an amplifier having a plurality of field effect transistors selectable in response to a control signal at a control terminal, said plurality of field...
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7605658 |
Resistively loaded single stage differential amplifier having zero volt common mode input
A resistively folded single stage differential amplifier capable of accommodating a low input common mode without impacting the performance of a bias current source, while also providing a high...
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7602249 |
Amplifier electronic circuit comprising a differential pair and a feedback system
An amplifier electronic circuit with at least one amplifier stage, including a differential pair that includes two input transistors controlled by respective input signals and means for measuring...
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7602250 |
Low noise AC differential amplifier with reduced low corner frequency and current consumption
An integrated amplifier may include a transconductance stage including a differential pair of input transistors of a first type of conductivity, respective resistive loads coupled to said input...
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7598807 |
Differential amplifier circuit, voltage regulator using the differential amplifier circuit, and method for controlling the differential amplifier circuit
A differential amplifier circuit, a voltage regulator using the differential amplifier circuit, and a method for controlling the differential amplifier circuit. The circuit includes a differential...
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7583752 |
Transmitter for outputting differential signals of different voltage levels
A differential signal transmitter including a driver circuit that generates a differential signal in response to data input. The amplitude of the voltage swings in the differential circuit is...
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7583147 |
Buffer drive
The present invention relates to a CMOS buffer circuit for liquid crystal display (LCD) drivers, which includes a single stage operational transconductance amplifier (OTA) with a differential of...
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7583142 |
Low skew differential amplifier using tail voltage reference and tail feedback
Using the tail level referencing for an inverter stage immediately following a differential amplifier provides trip point tracking with the variations in magnitude of the output level swings on the...
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7579911 |
Semiconductor circuit
An amplifier includes differential output and input stages. The differential output stage includes first and second current paths outputting differential signals and connected between first and...
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7576608 |
Amplifier circuit with voltage interpolation function
An amplifier circuit with a voltage interpolation function includes an N-type differential pair and a P-type differential pair. The N-type differential pair includes a first transconductance value,...
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7576610 |
Operational amplifier of class AB
A class AB operational amplifier is provided that includes first and second input transistors respectively coupled between first and second internal nodes and a first common node, first and second...
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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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7567124 |
Symmetrical differential amplifier
A differential amplifier has improved power efficiency, reduced offset penalty and a symmetrical output differential signal. Such a differential amplifier may include: (a) a bias circuit that has a...
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7567628 |
Symmetric differential slicer
A self-biasing slicer includes a self-biased differential transistor pair. As a result of the self-biasing, the slicer may receive input signals without the use of AC coupling. That is, a...
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7567123 |
Adaptive bias current circuit and method for amplifiers
An adaptive bias method and circuits for amplifiers that provide a substantial current boost based at least partly upon a sensed input power of an amplifier circuit. Methods and circuits of the...
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7564309 |
Wide input common mode for input bias current cancellation
Described herein is technology for, among other things, input bias current cancellation. The technology includes a bipolar differential pair coupled with a supply voltage (V CC ). The bipolar...
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7554405 |
Adaptive biasing input stage and amplifiers including the same
An adaptive biasing input stage includes pairs of differentially coupled amplifying and sensing field effect transistors having gates with differential inputs applied thereon. In addition, a static...
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7554402 |
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...
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7554404 |
Method and system for a low noise amplifier with tolerance to large inputs
Methods and systems for a low noise amplifier with tolerance to large inputs are disclosed. Aspects of one method may include providing an individual current source for each input transistor to a...
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7554376 |
Offset correcting method, offset correcting circuit, and electronic volume
An offset correcting circuit includes: an amplifying unit including an offset adjusting unit that adjusts an offset of the amplifying unit; and an offset determining unit that that detects the...
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7551030 |
Two-stage operational amplifier with class AB output stage
An operational amplifier includes a differential amplifier including an active load, a current mirror including a first branch and a second branch, a first switch connected between a first power...
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7548113 |
Apparatus, amplifier, system and method for receiver equalization
In some embodiments an apparatus includes an amplifier, a first inverter having an input coupled to an output of the amplifier, and a second inverter having an input coupled to an output of the...
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7545216 |
Amplifier with current mirror bias adjust
An amplifier includes a differential amplifier stage, a voltage amplification stage and a power output stage. The bias level of the output stage is proportional to current through the voltage...
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7541872 |
Startup circuit for subregulated amplifier
A multi-stage circuit has a first stage powered by the output voltage of a next stage. A current source within the first stage provides a tail current for a differential amplifier within the first...
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7541870 |
Cross-coupled low noise amplifier for cellular applications
Cross-coupled low noise amplifier for cellular applications. A circuitry implementation that includes two pairs of metal oxide semiconductor field-effect transistors (MOSFETs) (either N-type of...
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7538616 |
Wideband low distortion/low power
A differential circuit is described having first, second, third and fourth devices, each device having a control terminal and first and second terminals. The first and second devices are arranged...
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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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7532069 |
Differential amplifying circuit
Disclosed is a differential amplifying circuit including an amplifying circuit, wherein 1) a drain of a sixth transistor is connected to a drain of an eighth transistor, and a drain of a tenth...
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7525381 |
Amplifier structures that enhance transient currents and signal swing
Amplifier embodiments are provided that are well suited for systems which require high signal gains and high transient currents that can drive various loads (e.g., capacitive loads). At least one...
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7525382 |
Multi-level slew and swing control buffer
A buffer amplifier and an associated method have been provided for slew rate and swing level control in the buffering of a signal. The method accepts an input signal having a voltage swing, a swing...
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7525383 |
Differential amplifier
Connected to a differential transistor pair are a load current source and a tail current source. A bias circuit controls current generated by the load current source. A first self-bias switch is...
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7522003 |
Constant margin CMOS biasing circuit
A biasing circuit is presented. The biasing circuit includes a primary biasing circuit, a replica circuit and an amplifier. The primary circuit provides a biasing voltage and a primary voltage. The...
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7521997 |
Low-power variable gain amplifier
Provided is a low-power variable gain amplifier having a direct-current (DC) bias stabilizer. The low-power variable gain amplifier includes: a load block through which first and second load...
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7522000 |
Design structure for a serial link output stage differential amplifier
A design structure embodied in a machine readable storage medium for designing, manufacturing, and/or testing a design for protection for the transmission of higher amplitude outputs required of...
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7499677 |
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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7492223 |
Method and system for a highly efficient power amplifier utilizing dynamic biasing and predistortion
Aspects of a method and system for a highly efficient power amplifier (PA) utilizing dynamic biasing and predistortion are presented. Aspects of the system may include a processor that enables...
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7492226 |
Linearization apparatus of triode region type operational transconductance amplifier
Provided is a linearization apparatus of a triode region type operational transconductance amplifier that can provide a wide linear input range even when a differential pair input transistor having...
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7482872 |
Methods and apparatus for process invariant transconductance
In one aspect, a resistor process invariant transconductor is provided. The transconductor comprises a voltage input configured to receive at least one voltage signal, a current output configured...
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7466198 |
Differential gain boosted amplifier
A differential gain boosted amplifier is provided. The differential amplifier includes at least one current mirror, at least one differential pair, at least one cascode, at least one differential...
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7453317 |
Apparatus and method for reducing flicker noise of CMOS amplifier
An apparatus and method of reducing a flicker noise of a CMOS amplifier is provided. In the CMOS amplifier, a load circuit is connected to a signal input circuit which includes two pairs of MOSFETs...
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7449949 |
Data amplifying circuit controllable with swing level according to operation mode and output driver including the same
A data amplifying circuit for an output driver has a swing level that is controllable according to an operation mode. The data amplifying circuit includes a mode responding circuit supplying an...
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7443240 |
AM intermediate frequency variable gain amplifier circuit, variable gain amplifier circuit and its semiconductor integrated circuit
It is an object of the present invention to provide a variable gain amplifier circuit operable with a low power supply voltage and with less noise generated inside the circuit. In the variable gain...
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7425867 |
Differential input/differential output converter circuit
A differential input/differential output converter circuit. The circuit comprises differential complementary input modules each comprising cross-coupled devices for biasing current mirror masters...
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7423486 |
Silicon-on-insulator differential amplifier circuit
A differential amplifier formed on a silicon-on-insulator substrate, including means to prevent the bodies of its differential input transistors from charging to unwanted potentials in the standby...
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7414474 |
Operational amplifier
An operational amplifier with a broad applicable band and little disturbing noise which is capable of preventing oscillation even when used in connection with a negative feedback path. The...
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7414475 |
Linearity-improved differential amplification circuit
A linearity-improved differential amplification circuit is provided, A linearity-improved differential amplification circuit comprises a main differential amplification unit differentially...
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7411452 |
Low DC power rail-to-rail buffer amplifier for liquid crystal display application
A low DC power rail-to-rail buffer amplifier is suitable for liquid crystal display application. The buffer amplifier comprises: a dc bias stage, a pair of complementary differential amplifiers, a...
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7411453 |
Tail-current steering circuit and method for rail-to-rail operational amplifier input stage
An amplifier includes first and second pairs of differentially coupled input transistors. The first current mirror generates a reference current which is mirrored by a second current mirror to...
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