Amplifier Modifications To Reduce Non-Linear Distortion TRIZ Cases

Segmented signal chunks drive discrete supply levels and digital pre-distortion to improve RF amplifier efficiency across wide channels.

A spur detector and tagging circuit mark low-amplitude harmonic signals from nonlinear amplification so downstream EW processing can bypass them.

Direct DAC-to-MOSFET coupling cuts current sources, heat, and component count while preserving linearity in a high-fidelity amplifier input stage.

A circulator and dual-filter duplexer share feedback and reception paths to support TDD and FDD with simpler RF routing and lower power use.

An added compensation line emits inverted radiation to cancel signal-line EMI without differential pairs or costly filtering.

Two parallel LC filter branches broaden Nth-order harmonic suppression in a power amplifier while limiting fundamental-frequency loss and distortion.

A resistor-capacitor bias path limits thermal feedback in bipolar power amplifiers while preserving gain linearity and impedance matching.

A polyphase CFR circuit interleaves dual filter paths to cut crest factor while pushing distortion and noise out of band.

Filtered compensation removes out-of-channel spectral components after amplification, cutting adjacent-channel interference while preserving constant-envelope efficiency.

A current-mirror feedback network helps a folded cascode instrumentation amplifier maintain high common-mode rejection and low distortion.

Clipping high-PAPR signals, then smoothing edges and limiting peak regrowth, cuts out-of-band emissions while preserving amplifier efficiency.

A tunable wideband observation receiver lets one power amplifier predistortion loop linearize signals across multiple communication bands.

A phase-shifted diode cancellation path offsets LNA third-order distortion while keeping noise figure degradation below 0.03 dB.

PWM common-mode control lets a class-D amplifier suppress supply noise and even harmonics without an LDO, improving PSRR and THD+N.

A gate-controlled FET varies TIA input inductance to suppress low-gain voltage peaking while preserving bandwidth, linearity, and noise performance.

Filtering AC components from the peak-amplifier bias control signal stabilizes current supply, improves AM-AM behavior, and suppresses harmonic distortion.

A two-stage predistortion scheme models amplifier saturation, clipping, and filtering to cut distortion and peak-to-average power ratio.

Selective Class A and Class B/AB amplifier paths keep EVM low at low power while sustaining higher RF output through parallel combining.

Pilot-signal calibration tracks phase and gain drift in multiport amplifiers to limit channel leakage and interference in satellite links.

Digital predistortion and quadrature correction work together to curb RF amplifier nonlinearity, modulation errors, and spurious signals.

Multiple fast error amplifiers split envelope tracking across MIMO power amplifiers to improve linearity, efficiency, and bandwidth handling.

Timing adjustment advances fast switcher control to offset ET delay, cutting tracker AC current, power use, and heat in RF amplifiers.

Lookup-table nonlinear gain terms linearize RF transmit chains while cutting computation and storage and adapting to output variation.

Dual current sensors and offset correction improve near-zero speaker current measurement, reducing distortion risk and sensing losses.

Cascaded compressive and expansive conversion stages cancel third harmonic distortion while preserving low noise and power use.

Sub-band FIR filtering separates memory-effect compensation from DPD, cutting computation and power while preserving EVM and ACLR.

Positive-feedback transconductors extend bandwidth and high-frequency gain in a single-stage amplifier while cutting power use and die area.

Uncorrelated noise in each MISO branch separates path contributions from combined feedback, improving predistortion without RF switches.

A high-impedance feed-forward correction path cancels transmitter amplifier distortion while preserving gain, linearity, and bandwidth.

Separate amplifier outputs for each loudspeaker driver cut circulating currents and distortion while preserving direct feedback control.

Threshold-based switching disables error feedback at low amplitudes to avoid ADC noise, while restoring distortion control at high signal levels.

Differential VDS sensing across both H-bridge halves averages out ripple for more accurate Class-D load current reading.

Bypass-switched degeneration lets an FBDDA cut THD at high input levels while preserving low noise and avoiding excess current draw.

Predicted loudspeaker and amplifier nonlinearity guides gain and compression changes to limit audible distortion with simpler models.

Power amplifier self-noise calibrates the receiver separately from transmitter errors, improving IQ mismatch correction without extra noise hardware.

Bandwidth detection switches envelope tracker filtering modes so RF amplifiers match supply voltage to signal envelope and cut heat and power use.

Demodulated I/Q harmonic filtering reduces RF transmitter harmonics and noise at high processing speeds without high SDM power cost.

Adaptive pre-distortion and error feedback cut amplifier distortion into low-impedance loads without raising power use or circuit area.

Switching between class-D and class-AB output modes cuts quiescent power, area, heat, and audio artifacts across signal levels.

Multiple unit cell groups and a fixed-attenuator bypass path extend gain range while preserving linearity, noise, and power efficiency.

Digital tilt filtering, CFR, and DPD cut OFDM PAPR in CATV amplifiers, improving signal quality and power efficiency.

Restored out-of-band monitor components let an amplifier compensation loop cut wideband distortion without a high-speed AD converter.

Multiple voltage-rail transistor paths drive PAM-4 optical modulators at high data rates while reducing power loss and parasitic-capacitance limits.

A conditioned feed-forward path cancels harmonic signals in a quadrature RF power amplifier, improving linearity with minimal efficiency loss.

A balanced polynomial digital pre-distorter linearizes nonlinear transmit chains with fewer parameters and less coefficient updating.

A variable shunt load adjusts impedance with signal level to delay RF amplifier compression, extend linear range, and cut distortion.

Precharging a DAC feedback capacitor before parallel switching cuts charge sharing spikes and greatly improves INL linearity.

Dynamic supply and amplifier-finger adjustment follows signal envelope changes to cut power loss while maintaining stable output.

Dynamic ET bias current holds average current nearly constant in multiband power amplifiers, reducing AM-PM distortion and improving ACPR.

A selected bandpass sampling rate keeps aliased multi-band images separate, cutting DPD observation bandwidth and power use.