Negative-Feedback-Circuit Arrangements TRIZ Cases

Using four voltage states across the load cuts high-frequency switching power, reducing loudspeaker dissipation and battery drain.

Shield conductors beside on-die feedback lines block ground parasitics and create useful feedback capacitance for faster amplifier settling.

A multi-extreme-frequency feedback circuit suppresses peaking, preserves high-frequency gain, and widens transimpedance amplifier bandwidth.

An adjustment resistor holds combined input resistance constant, keeping op-amp feedback and phase response stable across gain changes.

Switched resistors and an R-2R array calibrate receiver DC offset while cutting flicker noise and preserving output dynamic range.

Reactive inductor-capacitor feedback maps output impedance to the input, cutting noise and avoiding transformer limits in magnetic fields.

Level shifter resistors and an SOI input stage let small shunt signals be measured accurately under high common-mode voltage beyond the supply rails.

An op-amp and exponential current-feedback path enable wideband, linear gain control with low-voltage operation and low output impedance.

Signal-strength-controlled feedback impedance lets an LNA shift between low-noise and high-linearity operation across changing input levels.

Gain-dependent lowpass filtering suppresses dominant ADSL echo before high amplification, preserving SNR and preventing ADC overload.

Switched compensation capacitors reconfigure during setup and drive periods to boost slew rate while preserving stability and low power.

Negative feedback across modular active sub-circuits approximates a non-diagonal admittance matrix while preserving stable wideband response.

Dynamic gate bootstrapping keeps a MOS feedback resistor in subthreshold across wide voltage swings, stabilizing small-signal amplification.

Switching and mute signal monitoring lets a Class D audio amplifier detect short circuits and reset itself without a computer restart.

Lower-rate PWM in an H-bridge speaker amplifier cuts power loss and EMI while preserving acceptable low-fidelity audio output.

Closed-loop offset calibration cuts slow RC-driven detection time and holds DC levels within a target range to avoid signal distortion.

Series-connected transformers and transistors raise input impedance and output power while reducing line loss and parasitic effects.

Global current feedback replaces inductors in a multi-stage LNA to independently tune gain, noise, distortion, and input impedance.

A comparator and switchable feedback elements cancel op-amp offset during amplification, even when external feedback components are used.

Delayed complementary PWM pulse trains maintain non-zero drive near zero crossings, cutting crossover distortion, noise, and THD.

Separate transconductance paths stabilize common-mode signals while preserving differential bandwidth and preventing amplifier oscillation.

A power control hub lets one high-frequency trace carry RF and DC signals, simplifying vehicle wiring while reducing antenna power use.

Mapped digital trim values and modulated gain settings correct PGA resistor mismatch errors without costly laser trimming.

Feedforward voltage correction predicts output drop from input amplitude, helping digital amplifiers suppress distortion during real-time load changes.

Matched resistor ratios and op-amp feedback cut gain error and DC offset while combining level shifting and amplification in less area.

Sequentially switching parallel transistors softens amplifier power on/off transitions, making pop noise effectively imperceptible.

Bootstrap feedback with JFET or MOSFET inputs lifts impedance above 100 MOhms and keeps over-rail level shifting linear with low bias current.

A tri-level, filterless PWM amplifier cuts power use while preserving audio fidelity through DC-free output control and feedback.

An adaptive dual-loop controller corrects RF amplifier envelope errors while preserving stability and reducing distortion and sideband noise.

Scaled power-supply voltage is added to the PWM feedback signal to offset filter mismatch, reducing distortion and supply dependence.

A controller tracks RF output distortion and raises or lowers amplifier supply voltage to keep linearity near limits while reducing wasted power.