Radio frequency system switching power amplifier systems and methods

Amplifiers operating in envelope tracking mode or non-envelope tracking mode

Bias control for stacked transistor configuration

Variable gain amplifier and driver implementing the same

Amplifier arrangement

Control systems and methods for power amplifiers operating in envelope tracking mode

Amplifiers operating in envelope tracking mode or non-envelope tracking mode

Optimization methods for amplifier with variable supply power

Amplifier dynamic bias adjustment for envelope tracking

Amplifier dynamic bias adjustment for envelope tracking

Precision, high voltage, low power differential input stage with static and dynamic gate protection

Multistage amplifier circuit with improved settling time

Operational amplifier

Bias control for stacked transistor configuration

High slew rate operational amplifier and operating method thereof

Control systems and methods for power amplifiers operating in envelope tracking mode

Amplifier dynamic bias adjustment for envelope tracking

Amplifiers operating in envelope tracking mode or non-envelope tracking mode

Optimization methods for amplifier with variable supply power

Dual carrier amplifier circuits and methods

Transconductance adjustment circuit, circuit device, and electronic apparatus

Fully differential amplifier topology to drive dynamic speakers in class AB mode

Enhanced transconductance circuit

Rail-to rail input circuit

Incremental gain amplifier

Radiation hardened differential amplifier

OPERATIONAL AMPLIFIER

Re-driver with pre-emphasis injected through a transformer and tuned by an L-C tank

Amplifier with non-linear current mirror

Amplifier common-mode control methods

Method and apparatus for broadband input matching with noise and non-linearity cancellation in power amplifiers

Gyrator circuit, wide-band amplifier and radio communication apparatus

Peaking circuit, method for adjusting peaking circuit, differential amplifier installing peaking circuit, laser diode driving circuit installing peaking circuit, and data processing unit installing peaking circuit

Power amplifier and semiconductor integrated circuit

Dual carrier amplifier circuits and methods

Operational amplifier with decreased through current, and display panel driver and display device incorporating the same

Bias circuit and amplifier providing constant output current for a range of common mode inputs

TWO-CHANNEL OPERATIONAL AMPLIFIER CIRCUIT

Low-noise high efficiency bias generation circuits and method

Enhancing dual op-amps for differential connections

Incremental gain amplifier

Voltage regulator operable to switch between a two-stage structure operation and a three-stage structure operation

Differential amplifier

Bias circuit and amplifier providing constant output current for a range of common mode inputs

Signal processing circuit with improved linearity

RF single-ended to differential converter

Signal amplifier

Operational amplification circuit

Light receiving circuit

Low phase noise amplifier circuit

High bandwidth, rail-to-rail differential amplifier with input stage transconductance amplifier

High bandwidth, rail-to-rail differential amplifier with intermediate stage current amplifier

High bandwidth, rail-to-rail differential amplifier with output stage amplifier

Operational amplifier and display panel driving device

Delta-sigma analog-to-digital converter

Input system for a variable gain amplifier having class-AB transconductance stages

Operational amplifter circuit, and driving method of liquid crystal display using the same

Post amplifier with selectable gain

Offset cancellation circuit and display device

Common mode control circuitry for multi-stage operational amplifiers

Differential amplifier

Differential amplifier

Low voltage, high-speed output-stage for laser or modulator driving

Variable-gain wide-dynamic-range amplifier

High performance variable gain amplifier, method of use and design structure

DIFFERENTIAL AMPLIFIER WITH INPUT STAGE INVERTING COMMON-MODE SIGNALS

Slew-enhanced input stages and amplifiers

Transconductor

Apparatus for slew rate enhancement of an operational amplifier

Radio transmitter

Low noise, low power, high linearity differential amplifier with a capacitive input impedance

Data amplifying circuit controllable with swing level according to operation mode and output driver including the same

Square-function circuit

Controlled transconductance differential stage

Digitally adjusted variable gain amplifier (VGA) using switchable differential pairs

Buffer drive

Amplifier and system utilizing the same

Linearized class AB biased differential input stage

System and method for distortion cancellation in amplifiers

Differential signal comparator

Three-stage amplifier

Delay stage, ring oscillator, PLL-circuit and method

Differential circuit

System and method for linearizing a CMOS differential pair

Amplifying circuit of semiconductor integrated circuit

Rail-to-rail operational amplifier with an enhanced slew rate

Peak detector and fixed gain amplifier circuit for automatic gain control and variable gain amplifier circuit

Digitally adjusted variable gain amplifier (VGA) using switchable differential pairs

Tuneable circuit for canceling third order modulation

Input system for a variable gain amplifier having class-AB transconductance stages

Operational amplifier

Dual op amp IC with single low noise op amp configuration

Circuit and method for driving bulk capacitance of amplifier input transistors

Current feedback amplifiers

Differential amplifier stage

Magnetoresistive head preamplifier circuit with programmable input impedance

Continuous-time delta-sigma analog digital converter having operational amplifiers

Differential amplifier and operational amplifier

Output buffer with improved output deviation and source driver for flat panel display having the output buffer

Ultrasound imaging or other use variable input impedance preamplifier

Variable gain voltage/current converter circuit having current compensation circuit for compensating for change in DC current flowing into active element for performing voltage/current conversion

Variable gain amplifier having linear-in-decibel transconductance

Method and apparatus for tuning GMC filter

Analog preamplifier calibration

Signal generation apparatus, frequency converting apparatus, and receiver

Output buffer circuit

Variable gain amplifier

Transmission circuit for use in input/output interface

Operational amplifier

Current feedback amplifiers

Linearity-improved differential amplification circuit

Method and apparatus for presetting an amplifier

Radio transmitter

Data amplifying circuit controllable with swing level according to operation mode and output driver including the same

Power amplifier arrangement, particularly for mobile radio, and method for determining a performance parameter

Differential amplifier and operational amplifier

Neutralization techniques for differential low noise amplifiers

Apparatus and method for increasing a slew rate of an operational amplifier

Digitally adjustable variable gain amplifier (VGA) using switchable differential pairs

Input system for a variable gain amplifier having class-AB transconductance stages

Differential amplifier, data driver and display

Differential amplifier and data driver for display

Low phase shift implementation of the baseband circuitry of a Cartesian feedback loop

Operational amplifier with less offset

CMOS class AB folded cascode operational amplifier for high-speed applications

Signal conversion circuit

CMOS variable gain amplifier for controlling dB linear gain

Operational amplifier circuit

Amplifier, voltage stabilizing unit and method thereof

Amplifier, voltage stabilizing unit and method thereof

Cross-talk reduction circuit and method therefor

Mixer stage and method for mixing two signals having different frequencies

Comparator with offset compensation

Push-pull buffer amplifier and source driver

High slew ECL device and method therefor

Class AB CMOS output circuit equipped with CMOS circuit operating by predetermined operating current

Circuits and methods for improving slew rate of differential amplifiers

Differential amplifier with cascade control

Amplifier arrangement having an adjustable gain, and use thereof

Method and apparatus for tuning GMC filter

Method to vary symmetry and coupling in symmetrical write drivers for disk driver preamplifiers

Method and circuit for trimming a current source in a package

Amplifier with a voltage-controlled quiescent current and output current

Low-voltage differential amplifier

Differential dual port current conveyor circuit

Integrated circuit implementation for power and area efficient adaptive equalization

Voltage comparator circuit

Differential-mode current feedback amplifiers

Differential amplifier without common mode feedback

Variable gain amplifier having linear-in-decibel transconductance

Apparatus and method for increasing a slew rate of an operational amplifier

Operational amplifier including low DC gain wideband circuit and high DC gain narrowband gain circuit

Operational amplifier including low DC gain wideband feed forward circuit and high DC gain narrowband gain circuit

Low-voltage differential amplifier

Differential amplifier and calculation amplifier

Active filter circuit using gm amplifier, and data read circuit, data write circuit and data reproducing device using the same

Tail current generator circuit for bipolar/MOS differential pair to set precise transconductance

Single-ended input, differential output low noise amplifier

Balanced variable gain amplifier capable of achieving performance by low source voltage