Power Amplifiers TRIZ Cases

Amplitude and phase adjustment across two digital amplifiers controls combined outputs to extend linear operation beyond saturation.

A charge pump tracks input level to vary positive and negative rails, cutting loss, capacitor size, layout area, and EMI in class G audio amplifiers.

Adjustable phase delay and LC impedance matching let a Doherty RF amplifier maintain efficiency and linearity across multiple bands.

A split-path envelope tracking supply combines linear amplification and switching current support to raise bandwidth, cut loss, and improve ACPR.

Switching the regulator bias between ON and OFF voltages cuts leakage current while preserving low loss for mobile power amplifiers.

A center-tap transformer and switch handle impedance matching in an RF transceiver, cutting extra amplifier use, energy draw, and cost.

Digital switching amplifying units vary parallel capacitance to generate RF power directly, cutting combiner loss, noise, and transmitter complexity.

Stabilized active feedback lets one reconfigurable filter tune Q-factor, center frequency, and bandwidth across bands without hardware changes.

Switchable parallel gain stages and tunable matching let one RF amplifier cover multiple bands and power levels with lower power use.

A current-sensing supply circuit limits and shuts off RF amplifier current during prolonged impedance mismatch to reduce battery drain.

Switchable biasing in a cascode RF power amplifier adjusts gain to keep noise low while cutting power use and preserving impedance matching.

Matched logarithmic feedback corrects RF power amplifier AM/AM distortion across varying symbol rates while improving efficiency and emissions.

Envelope-based bias boosting raises transmitter supply only during signal peaks, preventing clipping while limiting power dissipation.

A balun-based output network links balanced class B, E/F, and CMCD amplifiers to LINC or Chireix stages without hard-to-build low-loss transformers.

A nonlinear drive phase that varies with output amplitude turns sharp transition points into regions, improving composite amplifier efficiency under detuning.

Dynamic rail switching matches headphone amplifier supply voltage to signal level, cutting power use, clipping, EMI, and capacitor size.

Matching the gate bias resistor to transistor input impedance suppresses low-frequency gain and cuts distortion in mobile RF power amplifiers.

Adaptive charge-pump control cuts low-level amplifier power waste while raising voltage as needed to avoid clipping across process and temperature shifts.

Balun-based balanced output combining lets CMCD and class E/F amplifiers work with LINC or Chireix networks without hard-to-build low-loss transformers.

Combining polynomial predistortion and adaptive filtering corrects power amplifier memory effects, cutting distortion at higher output power.

A brief equal-current state before idle lets both driver paths absorb diode charge storage and external noise without corrupting receiver logic.

A dynamic scale factor adapts out-phasing angles in a multilevel LINC transmitter to improve power efficiency and linearity.

A capacitive-divider drain follower drives large PMOS gates rail to rail in low-voltage circuits without the voltage drop, area, or bandwidth penalties.

A transformer voltage-coupling scheme lowers transistor voltage stress, enabling higher output power with better reliability and efficiency.

Dynamic threshold scaling based on received optical power helps optical receivers cut noise-driven bit errors without manual threshold tuning.

A coupling element steers RF signals across multiple amplifier paths without switches, improving low-power efficiency and extending battery life.