Amplifier Modifications To Reduce Non-Linear Distortion TRIZ Cases

Current steering adapts TIA gain to optical input power, cutting power use and peaking while improving linearity and bandwidth.

RF digital predistortion after upconversion cuts sampling demands and avoids extra upconversion paths in multi-band transmitters.

Switching between direct and down-converted input paths lets a limited-range predistortion unit linearize and amplify signals across wide frequencies.

Split power control between a reference amplifier and feedback attenuation to simplify Cartesian RF transmitters and cut power use.

Variable capacitance from an impedance conversion circuit helps a predistorter offset amplifier amplitude and phase distortion without sacrificing gain or bandwidth.

A passive matching circuit offsets gain variation in envelope-tracking power amplifiers, improving linearity without added control circuitry.

Adaptive clipping keeps a LIDAR transimpedance amplifier near saturation threshold, reducing pulse distortion and recovery time.

A split-band amplifier structure boosts multi-band signals while cutting amplifier size and manufacturing cost in distributed antenna systems.

A low-power, wideband predistortion path linearizes RF power amplifiers while reducing cost, bulk, and power demands.

Electrically isolated cascode sub-cells block current hogging and overheating, keeping transistor arrays uniform and reliable.

Variable impedance and bias tuning keep amplifier gain and phase more linear across frequency, supply voltage, and temperature.

Calibration equalizes feedback and input resistor ratios in a differential amplifier to suppress distortion from common-mode voltage shifts.

Separate PA chains switch between envelope tracking and constant supply modes to cut current use while preserving linearity without DPD.

Low-pass and high-pass input filters suppress harmonic leakage and intermodulation noise while avoiding the efficiency loss of bandpass filters.

Fixed-phase linear and nonlinear signal splitting generates correct sub-amplifier drive signals without external feedback or control circuitry.

Feedback-based expansion estimation and curve fitting reduce DPD over- or under-expansion caused by transmit power measurement errors.

A capacitor-resistor bias network boosts current only at high RF levels, preserving linearity and limiting gain compression with lower power draw.

Power detection at symmetry nodes drives phase and amplitude adjustment to reject odd and even harmonics in differential RF amplifiers.

Local-table interpolation on SIMD vector units cuts AU memory demand while enabling real-time digital pre-distortion for transmit signals.

Orthogonal wavefront multiplexing lets parallel power amplifiers share RF power across channels without signal coupling or fixed-frequency combiners.

Separate band paths and cross-coupled predistorters cut sample-rate complexity while suppressing out-of-band intermodulation distortion.

A frequency-dependent input reflection circuit reshapes power distribution in wideband Doherty amplifiers to improve linearity and efficiency.

By decoupling amplifier stages during calibration, this case compensates offsets from both the input stage and preceding circuitry.

Series and resonant impedance networks reduce transistor output capacitance, improving Doherty amplifier bandwidth and efficiency across signal levels.

Envelope-shaped digital predistortion limits RF spectral regrowth while preserving linearity and power efficiency in transmitters.

Input signal analysis drives feed-forward amplifier control to avoid slow unstable feedback, improve gain stability, and reduce interference.

A shared feedback path separates odd- and even-order distortion components to simplify multi-band power amplifier linearization and improve radio quality.

A feedback calibration loop derives an inverse kernel for phase pre-distortion, cutting polar RF phase-path distortion and improving transmission accuracy.

Adjustable transistor size ratios are calibrated against test outputs to minimize second-order distortion despite process mismatch.

A compressed envelope signal with peak look-ahead improves power amplifier efficiency while suppressing clipping and distortion.

Peaking inductors extend cascode amplifier bandwidth while a degeneration resistor cuts harmonic distortion with minimal area and power impact.

Dynamic bias current tracking follows signal envelope voltage to cut power amplifier current use while reducing AM-PM distortion and improving ACPR.

By predistorting each upconverted band at RF, this case cuts sampling demands and upconversion complexity while linearizing multi-band transmitters.

A resistive input power splitter rebalances main and peak amplifier drive to correct gain mismatch, improve linearity, and support wideband Doherty operation.

Switched degeneration and operating-point compensation let a differential amplifier vary gain and linearity without larger transistors or DC shift.

Time-aligned input/output signals and curve-fitted real and imaginary LUTs improve DPD convergence and ACLR in noisy nonlinear amplifiers.

Output signals are downconverted and emulated to detect cross-talk and adjust gain and phase, improving satellite amplifier isolation.

A voltage-sensed clipping threshold lets automotive audio amplifiers limit distortion while preserving available power across battery swings.

Current sensing and DC bias adjustment keep quiescent current stable in Class AB push-pull amplifiers despite device and temperature variation.

Multiple amplifier paths with error calibration cancel distortion despite gain mismatch, improving ACPR with lower feedforward complexity.

Discrete supply-voltage selection and RF amplitude-phase control let transmitters maintain linearity while improving efficiency during power backoff.

Digital predistortion and split RF gain stages curb power amplifier distortion across wide output swings, improving WLAN signal accuracy.

Combining adaptive pre-distortion with filtered feedback reduces circuit nonlinearity across wider bandwidth while maintaining stability.

Constant-envelope branch amplification and vector recombination improve RF linearity and efficiency while avoiding outphasing loss and bandwidth limits.

Dual equalizers in both bridge arms compensate parasitic GHz effects, enabling broadband predistortion matched to power amplifier variation.

A transceiver cuts worst-case power draw by switching linearity and transmit power modes from jammer, process-corner, and temperature signals.

A reactance control circuit resonates with transistor parasitic capacitance to cut distortion and improve RF power amplifier efficiency.

Selective sample updating stabilizes RF pre-distorter coefficient training under frequency hopping and amplitude variation.

A ferrite bead and PCB capacitors block RF leakage from the power amplifier supply path to the battery, reducing harmonics and noise.

Cross-coupled common-base current multiplication boosts cascode amplifier linearity without raising overall power consumption.