Gated Amplifiers TRIZ Cases

Switched isolation disconnects unused band amplifiers to cut load effects, reduce interference, and avoid extra passive components.

By switching output-stage amplifiers by PA power level, this envelope tracker cuts quiescent current and improves mid- to low-power efficiency.

A bypassed RF output circuit switches between single and split outputs to cut power loss and improve isolation across multiple bands.

A controller switches between two power amplifier ratings to deliver surgical waveforms with less heat, less clutter, and simpler operation.

Dynamic bootstrapping helps an RF shunt switch balance linearity and on-state resistance with faster transitions and lower loss.

Buffer coupling and MOS bulk biasing hold disabled channels near output voltage, cutting leakage distortion in high-impedance sensor multiplexing.

Negative-bias switching and staged muting let a wideband power amplifier enter TDD mute mode with lower interference and stable transistor deactivation.

A shared DPD feedback path lets an RF frontend derive TX power for closed-loop TSSI, cutting couplers, power use, and FEM complexity.

A single-LC-filter modulation circuit cuts silicon space and complexity while keeping EMI low and improving switching loss and THD.

Multiple switchable cascode LNAs replace passive splitters to improve carrier aggregation isolation while reducing noise figure and preserving linearity.

Digitally controlled amplifiers and a variable transformer linearize RF-DAC power output while reducing calibration complexity.

Selective supply switching lets one or both power amplifiers run at matched voltage levels to limit efficiency loss from discrete power steps.

Reflected-to-incident power sensing drives a fast PWM bias circuit that protects active antenna power stages from mismatch without bulky insulators.

Bulk biasing and buffer coupling hold disabled-channel nodes near output voltage, cutting leakage current that distorts high-impedance sensor signals.

Shared peak amplification across multiple RF bands cuts amplifier count while preserving amplification characteristics through transformers and transmission lines.

Precharged setup nodes and differential amplification improve strobe-based data capture speed while reducing timing and voltage instability.

Multi-stage LNAs, switches, and tunable matching circuits cut RF front-end loss and complexity while supporting carrier aggregation and MIMO.

A switched-capacitive arm with one inductor adapts amplifier impedance across gain modes, saving front-end area and improving return loss.

On-chip switch or feedback equalizes bias and amplifier grounds during ATE IDD calibration, improving RF IC yield without added noise.

Gradually changing amplifier gain and output resistance smooths output-node voltage transitions and suppresses POP noise during path establishment.

Power-detected gain staging helps LiDAR receivers avoid saturation while preserving weak-signal detection across short and long ranges.

Dynamic power modes, shutdown thresholds, and audio supply control help smart speakers use power efficiently and shut down safely.

Multiple N-path filters driven by offset LO signals tune LNA bandwidth and center frequency while improving blocker rejection and process robustness.

Selective bias switching in AC-coupled memory receivers cuts inactive-rank capacitance, preserving bandwidth and signal integrity.

A dual-amplifier RF transmit path switches stages by output level to cut current draw while preserving maximum 5G transmission power.

By placing voltage-input and selector circuitry at the same level, this AMUX case cuts voltage overhead, switching time, and power use.

Bypass switching and current steering add LNA gain steps while preserving noise figure, output linearity, and port impedance stability.

Grounded top and side shield layers suppress electromagnetic coupling and noise in compact RF modules, preserving gain and noise figure.

A shared inductor serves both amplifier and bypass paths, cutting on-chip area and cost without adding separate inductive elements.

A rectifier-driven switch disconnects the amplifier in idle state, blocking camera and RF noise while keeping audio output ready.

Two parallel switched-capacitor CMFB loops raise bandwidth and phase margin, enabling fast op-amp turn-on in pipelined-SAR ADCs.

Two start-up transistors simplify op-amp bias initialization, cutting power use while avoiding extra poles, zeros, and DC offset.

A bypassed second differential stage and current steering give this multi-stage LNA flexible gain modes without sacrificing noise figure or output linearity.

High-voltage tolerant supply switches isolate thin-oxide LNA cascodes from OFF-state stress while preserving noise figure and third-order intercept.

An integrated Doherty RF module uses carrier, peak, phase-shifting, and bias circuits to improve back-off efficiency without increasing circuit size.

Multiple cascode LNAs in a split receiver front end improve isolation and noise figure for intraband and interband carrier aggregation.

Parallel amplification cells and impedance-ladder tap switching enable fine RF attenuation steps while keeping SNR nearly flat.

Selective DC/DC switching lets multiple power amplifiers share supply voltages for SPT and APT, cutting circuit scale in multi-band front ends.

An AC-coupled resistor ladder and common-gate cascode path preserve impedance matching while blocking output kickback in programmable gain amplifiers.

Using opposite board surfaces for power amplifiers and a switch cuts multiband RF module size while limiting leakage, loss, and interference.

Vertical placement of amplifiers, switches, and controllers improves isolation in compact RF modules while reducing noise interference.

A switchable straight-through path lets the op-amp sleep during bioelectric connection checks, cutting power, leakage current, and response delay.

Adaptive bias transistors switch on at large input swings to curb AMAM distortion, improve EVM, and extend RF power saturation.

A switched PA and power combiner preserve target transmit power across 2G and 4G modes while reducing RF module count and wiring.

Resonant second- and third-order rejection circuits in the output match cut RF harmonics and reflections while improving amplifier efficiency and linearity.

A shared matching circuit lets multi-band power amplifiers switch modes and bands without separate matching networks or added circuit area.

External impedance matching lets one amplifier module support multiple frequency bands without adding more modules.

A series gate resistor-capacitor network boosts single-stage cascode FET gain through resonance while limiting noise figure degradation.

Selective RF filter switching shares transmit and receive filters across multiple bands, reducing transceiver space while supporting wide-band signals.

Feedback from rising drain voltage adjusts cascode gate bias to speed turn-off and cut switching loss in power supplies.

A phase correction circuit aligns parallel power amplifier outputs to suppress oscillation and keep multi-band communication signals stable.

A lookup-table-tuned RF amplifier tracks band-switch settings to preserve impedance matching, power output, and efficiency across bands.