Amplifiers With Memory Effect Compensation TRIZ Cases

Selective feedback devices let a PA regulator adapt to output power, cutting memory effects and improving EVM without digital compensation.

Memory-polynomial LUT predistortion lets power amplifiers run nearer compression while preserving ACLR, EVM, and signal linearity.

Neutralization current cancels leaked modulated current in RF power amplifiers, suppressing remodulation and improving ACLR.

Selective DPD unit activation matches bandwidth and resource allocation to preserve PA linearity while avoiding unnecessary processing load.

Discrete supply switching and split DPD models cut nonlinear distortion while reducing parameter memory in a dual power amplifier.

A unified AI-DPD hardware structure uses software-configured neural networks to handle ultra-wideband PA nonlinearity with lower hardware overhead.

Predicting future traffic lets DPD pre-set PA coefficients and biasing to cut convergence time, preserve linearity, and reduce computing load.

Real-time LUT and delay adjustment keep envelope tracking supply voltage aligned with RF power envelopes, reducing clipping and power loss.

A CNN and dilated CNN split DPD architecture improves power amplifier linearity with fewer coefficients for embedded deployment.

Delay-adjusted envelope tracking aligns PA supply voltage with the RF power envelope to reduce clipping, compression, and power use.

Switchable DPD multipliers use full, approximate, or bypass modes to cut radio transmitter power and computation while preserving predistortion.

Dual predistortion circuits separate slow nonlinear effects from fast Idq drift, improving amplifier linearity without excessive update load.

A configurable DPD filter uses selectable decimation ratios to compensate power amplifier charge trapping and maintain RF signal linearity.

Feedback bias control measures quiescent current and adjusts gate drive to suppress GaN memory effects and pulse amplitude contamination.

Adaptive RF-domain predistortion linearizes wideband power amplifiers without baseband I-Q sources, improving efficiency and reconfigurability.

Undersampling the power amplifier output removes down-mixing and anti-aliasing stages while preserving DPD correction accuracy.

Processing CFR in sample blocks cuts software overhead, preserves signal continuity at block edges, and lowers PAR with less noise.

A narrowband feedback predistortion architecture compensates nonlinear RF filters while cutting adaptor complexity, cost, and size tradeoffs.

Parallel IIR predistortion paths compensate GaN amplifier memory effects to cut spectral growth, lower ACPR, and improve signal linearity.

Predistorted input signals linearize non-linear power amplifiers, cutting adjacent-band leakage while preserving transmission efficiency.

Duplexers, switches, circulators, and interference cancellation let one wideband amplifier serve multi-band RRUs without losing Tx-Rx isolation.

Lower-rate feedback sampling lets digital predistortion correct power amplifier nonlinearity and memory effects with less power use.

Adaptive digital predistortion and switched feedback improve RRU power amplifier linearity, efficiency, and multi-band reconfigurability.

An LC resonant network at the second-stage input offsets phase distortion and memory effects, improving RF amplifier ACLR without sacrificing efficiency.

Parallel IIR filter paths compensate GaN power amplifier memory effects, reducing ACPR and bit error rate in wireless signals.

Adaptive digital predistortion and quadrature compensation linearize wideband RF power amplifiers without baseband I-Q sources.

Duplexers, circulators, switches, and interference cancellation improve RRU transmit-receive isolation while cutting amplifier count, size, and cost.

Maximum likelihood sequence estimation replaces delta-sigma modulation to synthesize RF signals with lower oversampling and stable high-frequency output.

Adaptive digital predistortion linearizes RRU power amplifiers, improving efficiency and supporting field-reconfigurable multi-band wireless links.

Adaptive RF-domain predistortion raises amplifier linearity and efficiency across multiple modulation schemes without baseband I-Q sources.

Separate CFR blocks by radio technology and sampling rate, then aggregate signals to cut latency and complexity while improving PA efficiency.

Duplexers, switches, circulators, and interference cancellation let a multi-band RRU share one wideband power amplifier while protecting receiver isolation.

Programmable delay elements, DAC-set coefficients, and transimpedance amplifiers sustain high-bandwidth cost functions under PVT variation.

Processing CFR in data blocks with pre- and post-cursor samples cuts per-sample overhead, controls peak regrowth, and improves amplifier efficiency.

Branch-specific non-unitary delays improve pre-distorter memory modeling accuracy while reducing instability and unnecessary computation.

Matched auxiliary amplifier cells generate real-time pre-distortion to linearize broadband and frequency-hopping power amplifiers.

A wideband amplifier plus duplexers and interference cancellation lets multi-band RRUs cut power amplifier count without losing TX/RX isolation.

Multiple digital predistortion routes compensate separate amplifier distortion sources and memory effects to improve linearity and efficiency.

Orthogonalized basis functions adapt digital predistortion to input signal statistics, improving amplifier linearity, stability, and out-of-band suppression.

A delayed-signal error loop and adaptive circuit enable near-real-time RF predistortion correction under short-term temperature and power changes.

A linear-filter drain current estimate and gain-based signal components compensate RF amplifier memory effects and restore spectral symmetry.

Processor transforms polar coordinates into complex domains to synthesize output signals, eliminating the need for actual physical measurements during training.