Amplifier Modifications To Reduce Non-Linear Distortion TRIZ Cases

A main amplifier with parallel peaking stages holds impedance steady, reducing Doherty load modulation while improving bandwidth and back-off efficiency.

Programmable clamp circuits extend TIA input range and prevent ADC driver overload, preserving linear transfer in optical receiver chains.

A single multi-radio architecture combines MLOS and BLOS links while managing nonlinear distortion, interference, and power allocation.

Dynamic gate drive boosts current only during signal transients, cutting amplifier power use while preserving speed and low distortion.

A narrow band-pass feedback path extends multi-channel DPD bandwidth while lowering sampling demands, filter complexity, and cost.

Finite-symbol association identifies amplifier distortion and updates pre-distortion without an undistorted reference, improving linearity and efficiency.

A combined reference current tracks absolute and changing die temperature to keep power amplifier transistors linear and reduce DEVM.

Separate bias and linearization circuits improve RF amplifier linearity under PVT variation while preserving envelope bandwidth and efficiency.

A delayed RF transmit start plus quartz preheating and capacitor control reduces startup frequency drift without hardware changes.

An APD circuit pre-distorts RF input signals to offset compression-induced amplitude and phase deviation in 5G power amplifiers.

Dynamic bulk bias from the input envelope improves power amplifier linearity and raises compression point without complex linearization circuits.

A single hard-saturation FET or BJT with impedance-transformed load conditions maintains linearity at high output power while exceeding 60% efficiency.

Wideband feedback filtering preserves RF output information for a more accurate predistortion model, improving amplifier linearity and output quality.

Segmented indicator lamps show whether signal level is above or below a reference, helping users adjust levels without complex front-panel scales.

A switchable shunt-arm matching network lets a cascode RF power amplifier adapt impedance across power modes to cut AM-AM and AM-PM distortion.

A planar resistor preheats the RF PA during bursts to offset transistor thermal transients and maintain linearity with simpler EVM compensation.

Isolation switches disconnect unused n-type or p-type inputs, extending common-mode range while keeping amplifier input capacitance low.

Switchable RF amplifier branches adjust inductance and capacitance to keep phase nearly constant across gain modes without baseband calibration.

Normalized delay control unwraps phase and frequency shifts to limit spurious emissions and EVM in RF carrier modulation.

Adaptive lookup-table gains linearize multi-band RF transmit chains with lower computation and storage while reducing inter-band emissions.

Switched capacitive impedance preserves RF amplifier linearity and lowers EVM when bias current is reduced in low-power mode.

Feedback-driven bias adjustment captures RF input energy to suppress nonlinear distortion while improving power-added efficiency and heat behavior.

A threshold-switched ground on the coupling capacitor suppresses power-on plosive noise while avoiding extra power draw after startup.

Parallel LNA paths switch gain without biasing FETs into nonlinearity, preserving impedance match, noise figure, and current efficiency.

Two reception paths and a multiplexer keep switches off the signal path, preserving linearity while adapting power to transmission distance.

Selective open-loop and closed-loop switching cuts low-level noise in a Class D amplifier while preserving high-amplitude distortion correction.

A level-shift clamp diode keeps collector potential above base potential, preventing amplifier saturation and idle periods under overload.

Multiple frequency paths classify input signals by power and bandwidth so DPD coefficients can adapt and maintain amplifier linearity.

A narrow band-pass filter in the DPD feedback path expands RF amplifier linearization bandwidth while lowering sampling rate, power use, and filter complexity.

Dynamic OBO control uses AGC gain before DPD to adapt PA output power to traffic changes and improve IMD3 and EVM.

A modeled correction signal cancels power-amplifier intermodulation in receive bands, protecting uplink quality and spurious emission compliance.

A transistor linearizer adjusts DC bias and impedance to flatten amplifier transfer response, improving RF linearity with lower power dissipation.

Selective digital pre-distortion suppresses Tx-band leakage into the Rx band, improving reception performance despite amplifier saturation.

Frequency shifting condenses widely spaced RF bands before digital predistortion, cutting sampling-rate demands while limiting amplifier distortion.

Feedback from the downstream RF path enables digital self-interference suppression, reducing duplexer cost and size in distributed antenna units.

Pre-compensating HPA nonlinearities with multistage signal predistortion cuts spectral regrowth and in-band distortion near saturation.

Using resistors with different thermal coefficients, this bias circuit stabilizes base current to maintain gain flatness and EVM over temperature.

A dual predistorter splits slow and fast updates to track transient amplifier distortion while keeping processing load under control.

Phase and gain control across parallel RF amplifiers suppresses adjacent-channel leakage while lowering power use in wireless transmitters.

Adjustable transistor bias lets an RF oscillator switch modes to balance transmit power efficiency with receive-side frequency stability.

A controller reconfigures RF amplifier stages by input level to balance low noise and high linearity across a wide signal range.

A reusable predistortion function compensates frequency offsets and gain changes to keep PA linearity across wide 5G transmit states.

A compensator injects a lower-transconductance correction current to cancel MOSFET amplifier distortion and improve analog linearity.

A receiver control module detects intermodulation by stepping amplifier gain and comparing mixer output power, simplifying detection hardware.

Adjustable transistor size ratios and a detection circuit calibrate push-pull amplifiers to minimize second-order distortion despite process mismatch.

A transistor-capacitor bias network suppresses thermal positive feedback while maintaining power gain linearity and impedance matching.

A staged RF supply network filters receive-band noise and out-of-band emissions while preserving transmitter linearity and efficiency.

An integrated λ/4 and LC combiner redirects 2nd harmonics in a Doherty power amplifier to improve back-off efficiency and linearity.

A single subsampling feedback loop linearizes multiple RF bands at once, cutting RF hardware and power while preserving signal quality.

A diode-connected transistor and capacitor network cancels third-order distortion in a cascode LNA while preserving low noise and matching.