Gated Amplifiers TRIZ Cases

Selective amplifier paths and switchable reference-voltage generation reduce bias current at low to mid output power.

A switched coupling reduction circuit isolates capacitor-induced charge redistribution, keeping op-amp bias voltages stable during output enable.

Switchable matching paths keep the impedance trajectory out of low-impedance regions, cutting parasitic loss and variation sensitivity.

A high-bandwidth stage boosts initial settling, then disengages so a low-bandwidth path preserves low-noise signal amplification.

A shared detection circuit adjusts amplifier bias to track input amplitude, improving RFIC linearity and noise without extra area.

Impedance matching raises inactive-path input impedance to isolate RF amplifier branches under dynamic supply voltage and reduce leakage.

Switchable amplifiers and reactive output matching maintain RF power efficiency across low and high power states in multiple bands.

A shared charge pump envelope and bias supply cuts RF PA switching elements, supporting multi-band and multi-mode operation with lower circuit complexity.

By moving the multiplexer ahead of differential amplifiers, this TFT-LCD source driver preserves inversion functions while improving output drive without larger chip area.

Digitally switched transformer sections keep RF power combining efficient at back-off levels while limiting loss in inactive amplifier paths.

Switchable bias-current paths isolate disabled amplifier sections in low-power mode, reducing leakage while preserving multi-mode RF performance.

A selectively activated bypass path cuts pop and click transients while offset compensation enables direct-coupled mobile audio output.

A mode responding circuit adds source current to switch between small- and full-swing output, avoiding resistor retuning in semiconductor test mode.

Switched parallel transistors trim differential amplifier offset on-chip, correcting fabrication and wiring asymmetry without external bias voltages.

A transmission line transformer lets the drive stage feed the load directly, improving low-power efficiency and dynamic range without extra switches.

A replica cell and parallel amplifier cells enable stepwise RF output control that stays accurate despite temperature, process, and supply variations.

Selective activation of parallel amplifier branches and matching networks improves low- and high-power efficiency without RF switches.

A dual-stage LNA uses shared degeneration inductance and -g3 distortion cancellation to balance high linearity, low noise, and low insertion loss.

Discrete signal-path switching replaces analog variable-gain elements to cut noise and distortion while preserving precise gain control.

Equal capacitor precharge and delayed amplifier enable reduce turn-on and turn-off clicks by letting bias voltages settle first.

Parallel MOS gain branches and decoder control enable linear dB gain steps without relying on BJT-like exponential behavior.

A bypass branch tied to the coupler termination port avoids switch-path loss in normal mode, improving return loss, noise figure, and gain.

By embedding path switching into the amplifier stages, this RF design cuts signal loss, nonlinearity, and circuit size in multi-band operation.

Phase-shifted transistor drive multiplies a lower-frequency LO while canceling fundamental and even harmonics for mmWave use.

Selective transistor-bank switching and bias control maintain RF amplifier linearity while reducing power loss under power back-off.

A third transistor steers bias current away from the differential pair, keeping the tail source on for much faster amplifier enable and disable.

Additional source current switches between small- and full-swing output modes, avoiding resistor tuning while keeping test signals valid.

Dynamic bias and active impedance control keep a monolithic RF PA efficient and linear across low, medium, and high transmit power.

Multiple coupled transmission-line sections let a microwave amplifier bypass switch across frequencies with low loss when the LNA fails.

Multiple switching elements handle different input voltage ranges to keep memory input buffers stable and prevent duty distortion under voltage fluctuation.

An integrated RFIC combines LNAs, crossbar switching, AGC, and buffering to route multiple satellite inputs to tuners with less PCB area and noise.

Selective disabling of driver stages cuts low-level power use while improving amplitude and phase response by reducing coupling leakage.

Shared input and load inductors let a multi-band LNA switch between narrowband and wideband modes while saving chip area and limiting noise and gain loss.

Digitally selectable FETs and a tunable current source let one amplifier shift dynamic window size and position for better signal quality with lower power.

Digital feedback compensates amplifier distortion and suppresses EMI and power noise, improving audio quality and playback time.

A strong and weak amplifier path with impedance transformation maintains power efficiency across output ranges and cuts wireless device power use.

Selective gain-stage switching and binary-weighted feedback resistors cut LNA power use while controlling gain and noise figure.

Individual current sources let LNA input transistors float when off, improving tolerance to large signals without adding chip-level complexity.

Parallel source-follower current paths adjust RF amplifier gain while cutting power use and preserving carrier suppression and linearity.

By sharing differential stages, output circuitry, and resistor taps, this amplifier cuts IC area while preserving selectable gain.

Input and output switching let a standby amplifier replace or assist failed main amplifiers without shutdown while preserving CDMA signal isolation.

By deactivating one RF path and raising active-path impedance, the amplifier improves low-power efficiency without bulky isolators.

Parallel amplifier branches and control logic enable digital RF power and phase control without a single complex variable-power stage.

A Gm-C filter reuses its cells in oscillator mode for calibration, stabilizing corner frequency and bandwidth against process, voltage, and temperature shifts.

Selective cascode bias control and lower PA supply voltage cut battery drain while preserving required transmit power in wireless devices.