Gated Amplifiers TRIZ Cases

Adaptive switching between tube amp and op-amp modes improves audio texture for different sound sources while limiting power use.

Separate gain and bandwidth control tunes inductor contribution and switch resistance to improve VGA linearity and bandwidth.

A reconfigurable switch network and CMOS low-power path bypass DC-DC losses, improving RF amplifier efficiency across low and high output levels.

Incident and reflected power sensing drives PWM drain bias control to protect active antenna power stages without isolators.

A switch-free cascode LNA combines aggregated RF paths to preserve low noise figure, improve isolation, and reduce receiver size and cost.

Switchable balun turn ratios let one power amplifier support multiple gain modes, reducing RF component count, area, and circuit complexity.

A bootstrapping capacitor and transistor let the shunt switch self-bias by signal power, improving linearity and on-state resistance.

Parallel positive and negative amplifier stages keep impedance balanced, cutting INL, losses, and capacitive load in digital gain control.

Switched compensation capacitors create negative capacitance to offset parasitics, improving LNA stability, noise, and leakage behavior.

Separating two RF inductors onto opposite board surfaces suppresses magnetic coupling and lowers low-noise amplifier noise figure.

Multiple narrowband RF power amplifiers directly drive matched filters, removing switches and impedance networks to cut loss and current drain.

High-voltage tolerant branch switches reduce OFF-state stress on thin-oxide cascode LNAs, improving noise figure and third-order intercept point.

Signal-level-based control switches between linear and switching amplifier stages to limit current, cut losses, and preserve linearity.

Feedback-driven turn-off keeps the common-base transistor on until voltage rises, cutting cascode switching loss and power waste.

A switchable added inductor lets a multi-coil transceiver interface lower coupling in transmit mode and raise it in receive mode.

A resistor-adjusted amplifier decouples gain from MOS transistor gm, improving noise detection and image signal quality under supply variation.

Parallel RF amplifier paths use impedance inverters and phase adjustment to change power modes without signal-path switches, reducing loss and preserving bandwidth.

A series RC at the cascode gate turns source impedance inductive, boosting 4-5 GHz gain while preserving linearity and low noise.

Switchable cascode LNAs share input FET drains to improve split-mode isolation, noise figure, linearity, and receiver sensitivity.

Dedicated via heat paths route power amplifier heat to external terminals, limiting thermal coupling and preserving multi-band RF performance.

Separating the switch and matching inductor onto opposite board surfaces cuts electromagnetic coupling, leakage, and signal degradation.

A switched inductor tuning block lets one LNA cover wide RF bands while preserving low noise, high gain, and smaller die area.

Inner-layer inductors in a multilayer RF module reduce inter-band magnetic coupling and unwanted radiation during simultaneous communication.

A shared feedback and passive-path architecture improves RF attenuation linearity while limiting switch count, noise figure loss, and capacitive loading.

Selectable on- and off-chip impedance matching lets an RF receiver cut power or component count while preserving noise and linearity.

Feedback slope detection keeps the TIA output squelched until settling completes, preventing invalid data and reducing recovery delay.

A transconductance amplifier and selectable single-band circuits extract target RF bands from a wide-band input with lower receiver complexity and power.

Two parallel RF amplifiers with exclusive switching and band overlap maintain stable gain across wide 5G communication bands.

Three selectable LNAs replace passive splitting to improve isolation, cut losses, and preserve noise figure across interband and noncontiguous CA.

A T-type bypass switch lets an SOI LNA change between gain and bypass modes while limiting noise figure degradation and power loss.

Selective unit-cell switching and tunable output matching maintain load impedance across power levels and frequency bands.

Opposite-side LNA placement on a module board reduces coupling between multi-band reception paths and helps preserve reception sensitivity.

Switchable external matching networks let a single-chip RF amplifier tune output impedance across Wi-Fi and Bluetooth bands with lower size and loss.

Multiple common-base cascode stages split and amplify RF signals across bands without passive splitter loss or extra semiconductor dies.

Voltage signals switch power amplifier transistors off in idle state, cutting static dissipation while keeping fast response and simpler control.

Stored mode parameters let one power amplifier switch across Bluetooth, WiFi, and other signal types, cutting component count and footprint.

A hybrid voltage and feedforward current driver boosts 10Base-T peak swing from 2.5V while cutting wasted power in 100/1000Base-T modes.

Adaptive gain expansion and compression bias a power amplifier in open loop to improve wideband linearity and efficiency without feedback.

A two-switch power supply circuit disconnects amplifier capacitors in under 1 μs while limiting switch overstress and turn-off latency.

A switchable auxiliary terminal isolates the RF filter section from the power amplifier for direct frontend measurement without extra test pins.

A power detector and staged gain control prevent lidar signal saturation while preserving weak-return detection across varying distances.

Independent bias and enable control smooths ASK output power transitions, reducing spurious wave radiation while preserving amplifier efficiency.

Shared and dedicated load circuits let LNA groups support wide-band carrier aggregation with fewer LNAs, lower RFIC complexity, and smaller size.

Adaptive switching points adjust multi-level PA supply voltages to match RF envelope power, improving PAE while reducing power draw.

Dynamic RF filter sharing between transmitter and receiver reduces filter count and device size while supporting wider communication bands.

RF input power detection switches FET gate bias to cut quiescent current at idle, reducing heat and preventing amplifier damage.

An RF level detector reroutes signals through attenuator paths to protect RF amplifiers with programmable clamping across gain modes and frequencies.

Switch-controlled transistor paths let one amplifier handle multiple input signals while improving terminal isolation and reducing interference.

A switched CMOS LNA uses resonant inductors and a capacitor to improve split-output isolation while preserving low noise and high gain.

A current-sensing feedback circuit detects overcurrent in GaN transistors and quickly cuts current to limit heating and prevent failure.