Volume Compression/Expansion Having Semiconductor Devices TRIZ Cases
- MOS Variable Gain Amplifier With Exponential Gain Adjusting Circuit
Using sub-threshold and saturation-region control, this MOS gain-adjusting circuit delivers linear-in-dB amplification without extra compensation.
- RF Variable Gain Amplifier Cascode Mirror for Linear 74-dB Control
A wide-swing cascode mirror extends linear 74-dB gain control and cancels feed-forward leakage in 2 GHz WCDMA RF amplifiers.
- CMOS Variable Gain Amplifier With Linear-in-dB Control
An exponential DC converter and linear voltage multiplier let a CMOS VGA achieve linear-in-dB gain control despite MOS square-law behavior.
- Variable-Gain Amplifier RC Gate Control for Low-Distortion Switching
RC-controlled floating gates in a tapped-attenuator VGA cut switching distortion, improve linearity, and support stable CMOS gain control.
- RF Variable Gain Amplifier Cascode Mirror for Linear-in-dB Control
A wide-swing cascode mirror extends linear-in-dB gain tuning and cancels feed-forward isolation errors in 2 GHz WCDMA RF amplifiers.
- Op-Amp Clipping Detection Using Input Terminal Potential Difference
Comparator-based monitoring of op-amp input terminal potential difference detects clipping accurately while preserving sound volume through controlled attenuation.