Volume Compression/Expansion Having Semiconductor Devices TRIZ Cases

Thermal modeling estimates internal amplifier temperature from measured heat and power loss, enabling output limiting instead of shutdown.

Dual converter stages and tuning resistors turn linear control current into exponential output for wider, more uniform VGA gain steps.

Parallel current converters sum exponential output currents to extend VGA linear gain control while preserving uniform gain steps and noise performance.

A piecewise linear detector cell improves logarithmic conformance error while preserving dynamic range and low power in SDLA circuits.

Look-ahead gain approximation limits peaks before overdriving speakers while preserving array gain relationships and reducing processing load.

A feedback compressor uses low-pass power feedback and threshold adjustment to preserve burst audio peaks while keeping average speaker power below limit.

Logarithmic amplifiers and segmented current handling extend current measurement from 1 mA to 100 A with better accuracy and reliability.

A low-pass filtered feedback compressor delays attenuation so burst audio peaks pass cleanly while average output power stays within limit.

A saturation circuit stabilizes varying TOF signal amplitudes so a CFD can detect peaks more accurately and improve distance resolution.

Impulse-response analysis separates direct and reflected sound to set speaker volume accurately without strict microphone placement.

Parallel transconductors with distinct linear ranges keep gain and transition voltages stable across process, temperature, and supply variation.

Low-pass feedback compression limits average speaker power while letting short high-power audio bursts pass without added attenuation or distortion.

Predicted current draw switches an audio limiter into faster, lower-threshold control to prevent fuse blowout while preserving sound quality.

An integration release window lets fast and slow release paths suppress VCA ripple and audible modulation in audio dynamics processing.

A low-pass filtered feedback compressor delays attenuation so burst audio passes uncut while average output stays within power limits.

An active two-switch limiter reflects high-power input signals to protect an LNA while avoiding the noise increase of passive limiting circuits.

A sliding-current log-linear VGA smooths amplifier-cell transitions to extend dynamic range and keep RMS power measurement accurate.

A low-pass filtered feedback compressor delays attenuation until average power exceeds the limit, preserving burst audio waveforms.

Low-pass-filtered power measurement lets an audio limiter suppress sustained overloads without prematurely attenuating short burst waveforms.

A current preamplifier stage drives the log amplifier to cut RC limits from diode capacitance and extend bandwidth beyond traditional 1-2 MHz designs.

Phase-shifted gain modulation across left and right audio channels induces brainwaves while preserving the original music pitch.

A low-pass filtered feedback compressor delays attenuation so 1200 W audio bursts pass cleanly while average speaker power stays below 300 W.

Delaying attenuation with auxiliary and compressed feedback signals lets audio bursts pass cleanly while keeping average amplifier power below threshold.

Power-loss estimation and a thermal model infer internal component temperature, limiting audio output before overheating causes damage.

A bias tracker and swing-limiter clamp input voltage swings to protect radiation-hardened thin-oxide IC devices without shrinking dynamic range.

A single input-stage limiter with approximated gain prevents speaker overdriving while preserving relative gains across the array.

Switch-based active limiting reflects high-power input signals while passing low-power signals, protecting low-noise amplifiers without added noise.

Dynamic gain reduction during voltage limiting helps audio amplifiers preserve waveform shape, stabilize output power, and cut heat.

A current preamplifier stage cuts equivalent resistance and boosts diode current to expand logarithmic amplifier bandwidth beyond RC limits.

A saturation circuit clamps variable TOF signals before CFD peak detection, improving distance accuracy despite signal magnitude variation.

Coil resistance sensing and real-time gain compensation keep micro speaker temperature within range while avoiding current loss and audio distortion.

A low-pass-delayed attenuation path lets audio bursts pass cleanly while limiting only sustained power above threshold.

A CTLE-fed VGA uses DAC-controlled transistor resistance to improve SerDes gain tuning, SNR, linearity, and parasitic capacitance.

Logarithmic amplification and digital extraction separate tonic and phasic skin responses across a wide conductance range with lower ADC cost.

Signal compression and adaptive gain let an acoustic respiratory sensor capture quiet and loud physiological sounds without saturation or distortion.

A CTLE and DAC-controlled transistor resistance extend VGA gain tuning while reducing parasitic capacitance, distortion, and frequency-response errors.

Coil-end voltage sensing and non-linear gain compensation track micro speaker temperature accurately without resistor-network current loss or added noise.

Peak-based digital gain compression raises audio level toward a target while limiting noise growth, improving analog output SNR and dynamic range.

A triode-region transistor replaces switched resistors in a CTLE-VGA path, widening gain tuning while reducing parasitic capacitance and phase shift.

Voice coil current and voltage feed adaptive linear and nonlinear models to estimate diaphragm excursion accurately and prevent overtravel.

Predicted current draw switches an audio limiter into faster attenuation mode to prevent fuse blowouts while preserving in-vehicle sound quality.

Analog signal compression with digital decompression lets capacitive microphone amplifiers keep sensitivity across a wide dynamic range while limiting distortion.

Capacitive coupling and FET switching enable a fast, adjustable power limiter with better linearity and easier circuit integration.

A compressed signal path lets microphone gain drop before ADC saturation, preserving digitized audio quality under high slew-rate input.

A limiter adjusts the intermediate signal to match load impedance, enabling one switched-mode amplifier to deliver safe output power across speakers.