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US4077013A - Audio power amplifier with automatic bias ...
https://patents.google.com/patent/US4077013A/en
A power amplifier with an automatic bias control circuit is disclosed. The amplifier includes two complementary Darlington pairs operating in a push-pull mode providing output power. A …
High-Quality Audio Amplifier With Automatic Bias Control.d…
http://www.tubecad.com/2007/12/15/High-Quality%20Audio%20Amplifier%20With%20Automatic%20Bias%20Control.pdf
accomplishes this by using automatic bias control. The automatic-bias-control (a.b.c.) circuit used in this amplifier is a recent development. It was developed and patented by Lincoln Walsh for use in audio amplifiers and other electronic devices shortly before the war. The purpose of a.b.c. is to operate the amplifier at the desired condition for
Amazon.com: Mcm Custom Audio Automatic Two-Way …
https://www.amazon.com/Automatic-Two-Way-Source-Selector-Activated/dp/B00L9YVL90
Set your amplifier volume to 50% 9. Start broadcasting music to your audiocast device. Increase the volume of the tablet, phone or whatever your source is to MAX 10. With a thin screwdriver, on the holes on top of the source selector, set the Sensitivity to 70-80% 11. Music should be playing through your speakers right now.
EE2073_Automatic_Audio_Control_For_Audio_Amplifier
https://github.com/zhenyong25/EE2073_Automatic_Audio_Control_For_Audio_Amplifier
Build an Automatic Volume Controller for an Audio Amplifier System - GitHub - zhenyong25/EE2073_Automatic_Audio_Control_For_Audio_Amplifier: Build an Automatic Volume Controller for an Audio Amplifier System
Audio Compression Amplifier /AGC - ElectroSchematics.com
https://www.electroschematics.com/audio-compressor-agc/
This is an audio compressor/AGC (automatic gain control) with an astonishing 75db input voltage range. A P-Channel JFET is used as a variable resistance element that is applied as a variable attenuator. Distortion is minimized by keeping the signal voltage across the JFET extremely low (1.3mV). This is an improvement over similar circuits that place the …
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