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7620121 |
DC balance compensation for AC-coupled circuits
A receiver has a first input port and a second input port both coupled to a differential amplifier through first and second input capacitors. A bias circuit coupled to the core side of the first...
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7619475 |
Cancellation of common mode oscillation in RF circuits
A multistage RF amplifier amplifies RF signals used for communication in a WLAN communications system. The multistage RF amplifier comprises a first amplifier circuit coupled to a second amplifier...
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7619474 |
Analog circuit, electronic instrument, and operational amplifier
An analog circuit includes a first circuit including a first-type operational amplifier of which a frequency of an amplification target signal is a first frequency, and a second circuit including a...
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7619473 |
Fully-differential amplifier
A fully-differential amplifier able to operate at a low power supply voltage and provided with a common-mode signal suppression function is disclosed. This fully-differential amplifier is provided...
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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...
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7612616 |
Low-noise amplifier
A low-noise amplifier is provided according to the present invention. The low-noise amplifier includes a first amplifier stage, a second amplifier stage, a third amplifier stage, an input matching...
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7612609 |
Self-stabilizing differential load circuit with well controlled complex impedance
A circuit for providing a self-stabilizing, differential load circuit with well controlled complex impedance to an amplifier is described. According to an embodiment, two pairs of transistors in a...
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7609093 |
Comparator with low supply current spike and input offset cancellation
A current control circuit is coupled in parallel with the current paths of a differential comparator circuit to ensure that a substantially constant current is drawn from a current source during...
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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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7605655 |
Highly linear differential amplifier with a novel resistive source degeneration network
There is provided a highly linear differential amplifying circuit. The highly linear differential amplifying circuit includes: a differential amplifying unit including a main differential...
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7605654 |
Telescopic operational amplifier and reference buffer utilizing the same
A telescopic operational amplifier including a current source, an input stage, and a load stage is provided. The input stage is coupled to the current source and includes a group of input...
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7602246 |
General-purpose wideband amplifier
A single-stage amplifier includes (1) first and second “gain” transistors coupled in a common source configuration, (2) first and second resistors providing self-biasing for the first and...
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7599670 |
Dynamic bias for receiver controlled by radio link quality
DC power savings in a mobile communication device can be achieved by dynamically adjusting the biasing for a receiver based on the communication link quality. The output signal levels of at least...
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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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7592868 |
Rail-to-rail amplifier circuit and semiconductor device
A rail-to-rail amplifier for amplifying an analog signal from a DAC includes a first differential input section, which includes an n-channel transistor pair, a second differential input section,...
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7592867 |
Common mode feedback for large output swing and low differential error
A differential amplifier includes a differential input pair ( 2 A) coupled to a folded cascode stage ( 2 B) and a common mode feedback circuit ( 34 ) including a tracking circuit ( 30 A) coupled to...
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7586371 |
Regulator circuit
The present invention is contrived to adopt a differential pair type amplifier circuit comprising a differential pair constituted by a first transistor receiving an input of a first signal and by a...
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7583144 |
Power efficient programmable amplifier
A power efficient programmable gain amplifier is disclosed that provides programmable power consumption. The amplifier may include a first gain circuit and a programmable circuit that may include...
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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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7583138 |
System and method for controlling an error amplifier between control mode changes
A system and a method are disclosed for controlling an error amplifier between control mode changes. An error amplifier comprises a first stage that comprises a first current source and a second...
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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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7579878 |
High gain, high speed comparator operable at low current
A comparator includes a differential pair of transistors providing a first amplification stage and receiving inverting and non-inverting input signals. An output transistor is coupled to the...
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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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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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7573332 |
Amplifier with active inductor
An amplifier comprises an amplifier stage and an active inductor. The amplifier stage has an input terminal and an output terminal. The active inductor comprises first and second resistors and...
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7573331 |
Low power low noise amplifier for a magnetoresistive sensor
An amplifier for amplifying a differential input signal. The amplifier comprises a parallel configuration of a first and a second transistor differential amplifier, each responsive to a different...
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7570113 |
Overload recovery circuit for folded cascode amplifiers
In a method and apparatus for rapidly recovering an improved amplifier from an overload condition, a cascode amplifier (CASA) having a pair of inputs and an output is coupled to an overload...
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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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7567125 |
Differential amplifier with multiple signal gains and wide dynamic range
A circuit and method for amplifying a differential input signal over a wide dynamic range using multiple signal gains such that, over a predetermined range of values of the differential input...
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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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7564272 |
Differential amplifier
A differential amplifier is disclosed. The differential amplifier includes a first load element coupled between a first voltage and a first node. A second load element is coupled between the first...
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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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7554401 |
Power amplifier
A power amplifier based on a voltage-coupling scheme is disclosed. The power amplifier includes two active elements connected to each other via a primary part of a transformer, in which one of the...
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7554400 |
Integrator and error amplifier
An integrator is provided with protection against drift in the value of an integral during power save mode. An N-bit counter ( 12 ) is driven by the output of a comparator ( 11 ) to provide a...
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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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7554364 |
High-voltage operational amplifier input stage and method
Circuitry for preventing damage to differentially coupled input JFETs in an integrated circuit amplifier includes first (J 2 ) and second (J 4 ) differentially coupled input JFETs. A first input...
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7551033 |
Dynamic bandwidth compensating method and associated apparatus
A programmable gain amplifier includes an operational amplifier coupled thereto a plurality of resistors to perform a feedback control, thereby rendering a closed-loop gain
A f ( s ) = A ...
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7548115 |
Common mode rejection ratio trim circuit and methodology
An operational amplifier circuit includes an input differential circuit and a trim circuit for sensing the operational amplifier's input common mode voltage and generating an offset correction...
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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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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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7538618 |
Wideband active balun circuit based on differential amplifier
Provided is a wideband active balun circuit based on a differential amplifier. The active balun circuit is configured to compensate for unbalance between two differential signals and can be applied...
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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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7535301 |
Multi-amplifier circuit
A differential transimpedance amplifier circuit comprises a first amplifier, a second amplifier and a first resistance having one end that communicates with the input of the first amplifier. A...
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7535300 |
Operational amplifier
An operational amplifier and use of an operational amplifier is provided that includes an input differential amplifier, which is connected to a first input and to a second input and a differential...
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7532071 |
Operational amplifier circuit
A level shifter unit outputting a level shifted signal generated by level shifting of output signals of the first and second differential amplifier circuits, and an output circuit including...
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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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7532068 |
Differential amplifier circuit
A differential amplifier circuit includes a first transistor in which an electrode on one side is connected to a first constant current source, an electrode on the other side is connected to a...
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7528657 |
Baseband filter start-up circuit
An electrical circuit comprises a plurality of amplifiers. Each of the plurality of amplifiers comprises an input circuit in communication with an input of the amplifier and a start-up circuit in...
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7528656 |
Push-pull amplifier and method for low noise amplification
Provided is an amplifier including: an amplifier circuit receiving differential signals to generate amplified differential signals; a buffer generating buffered signals by buffering each signal...
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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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