Amplifier Modifications To Reduce Non-Linear Distortion TRIZ Cases

Feedback from a current sensor and low-pass filter stabilizes RF amplifier bias under power and temperature swings, protecting transistors.

One ET circuit generates separate modulated voltages for multiple RF amplifiers, reducing footprint and heat while maintaining linearity.

Inductive power combining lets switched-capacitor transmitters cut power use while maintaining output voltage and signal quality in wireless transmission.

Pre-modulating the ET voltage envelope improves delay tolerance and preserves RF amplifier linearity at higher 5G-NR bandwidths.

A single DPD model plus phase and magnitude control linearizes parallel beamforming power amplifiers while cutting complexity and power use.

Lookup-table predistortion adapts in real time to amplifier errors, reducing harmonics and intermodulation with lower computation.

Impedance matching with passive RLC elements compensates capacitance variation in a hybrid-coupler phase shifter to keep phase and amplitude stable.

Constant-bias VGA branches with degeneration resistors keep RF gain control wide while holding output phase and input impedance stable.

Parallel signal paths split overlapping frequency bands, enabling wideband high-power amplification with lower complexity and cost.

Source-degenerating resistors and diode-connected devices preserve transconductance amplifier linearity without long-channel NMOS speed loss.

Separate RF-decoupled bias paths for cascode devices suppress oscillation, reduce layout constraints, and improve high-frequency amplifier stability.

Phase compensation tied to gain mode and attenuation helps a variable-gain LNA avoid phase discontinuity while preserving low noise and linearity.

Rectifier-capacitor compensation at the cascode node boosts LNA IIP3 while preserving gain, noise figure, and SOI one-chip integration.

An LC inhibition unit, cascaded stray suppression, and a low-pass matching network cut harmonic and stray output while preserving RF amplifier linearity.

Split and summed current-mode paths cancel common-mode signals, improving CMRR while avoiding Miller-driven input capacitance and distortion.

Segmented frequency scans replace full-band ADC sampling to improve DPD calibration accuracy for wideband power amplifier output signals.

A split-path digital pre-distortion approach estimates wideband amplifier output beyond DAC limits to improve ACLR correction.

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

Dynamic control of supply voltage and first-stage gain compensates RF gain variation, improving linearity and efficiency without switching losses.

Digital correction lets low-power ADC drivers replace Class A input stages, cutting receiver signal-chain power while preserving linearity.

A voltage-dependent capacitor between base and collector corrects gain deviation during envelope tracking and improves RF power efficiency.

Empirical input-network tuning compensates branch and combiner dispersion to widen RF bandwidth and preserve amplifier efficiency.

A diode-based base-collector circuit offsets capacitance variation in a common-emitter RF amplifier, improving linearity without extra DC power.

A feedback and temperature-compensation bias circuit stabilizes power amplifier drive current across temperature changes, limiting efficiency loss.

Input samples near the origin are replaced with fixed values to suppress low-pass-filter ringing and keep LINC nonlinear amplifiers saturated.

Bootstrap circuitry shunts second-harmonic signals to cut secondary third-order intermodulation and improve RF amplifier linearity.

A series non-linear and linear amplifier chain inverts and scales the signal to cancel second-order distortion without parallel paths.

Using two inverter-based gain stages with feedforward and common-mode feedback, this amplifier maintains gain under low supply voltage.

Switching bias input between constant voltage and constant current keeps RF power amplifiers linear in both high and low output modes.

An FSPT circuit reshapes and smooths envelope signals to match input bandwidth, improving PA timing alignment and reducing energy loss.

Balanced polynomial pre-distortion linearizes nonlinear transmit chains with fewer coefficients, reducing computation and update frequency.

Dynamic gain adjustment detects transducer movement and attenuates audio before speaker-enclosure collisions cause distortion.

Multiple feedback loops and a folded cascode stage cut Miller-effect distortion while preserving high common-mode rejection.

Dynamic SDR-based DAS reconfigures remote units and pilot beacons to balance traffic, optimize radio resources, and improve indoor location accuracy.

Resonant use of parasitic capacitance and line inductance cuts dead-time distortion and switching loss in high-frequency class-D amplifiers.

Reusing conjugate-gradient residuals and directions stabilizes wideband PA direct learning, cutting numerical error and restart risk.

Tilt-adjusted CFR combines peak reduction with cable tilt compensation to prevent peak regrowth and preserve signal quality in amplifiers.

Continuous sampling updates the DPD inverse model even when peak input signals are rare, preserving HPA linearization accuracy.

A threshold-based three-amplifier outphasing scheme splits low and peak signal portions to improve efficiency across high-PAR, wideband links.

Adaptive error-based compensation cuts amplifier distortion under low-impedance loads without raising quiescent current, power draw, or circuit size.

Dynamic bias and impedance adjustment maintains amplifier linearity across source-voltage and temperature changes without complex pre-distortion circuits.

Parallel amplifier paths with different bias currents offset IM3 phase and preserve wideband linearity for closely spaced RF signals.

Current-sensed feedback matches speaker resistance and inductance to cut distortion and diaphragm displacement while preserving louder output.

A delayed switching path gives the power amplifier higher initial bias, cutting startup lag and improving response speed and linearity.

Direct RF or undersampling in the PA observation path removes down-mixing hardware while preserving adaptive linearization and efficiency.

Selective FET path shutoff and active bypass let this LNA cut current and gain while maintaining impedance match, noise figure, and linearity.

A shunt resistor and floating gate linearizer control bias ramping in CMOS power amplifiers to improve efficiency, linearity, and power use.

By moving band switching to a DPDT output stage, this LNA case improves noise figure and isolation for MIMO and carrier aggregation.

Gate-voltage detection and segmented charge control cut Class-D amplifier radiation interference without sacrificing efficiency, linearity, or robustness.

Preloaded predistortion sets let RF transmitters switch carrier configurations fast enough to maintain signal quality in dynamic LMR operation.