The diode bias current is created by a transistor-based peak detector circuit driven off the main audio signal. But don’t just take our word for it, watch the video after the break.

And, a true peak program meter displays the peak level of the signal waveform no matter how brief its duration. Enough preamble. It would be great if we start with the proven circuit of a practical ...

Operational amplifier IC1a is configured to function as a signal detector with release threshold of approximately 50mV. Observe that potential for audio amplifier ground is high in the ...

A simple two-transistor circuit generates the pulses at the zero-crossing point, a low-pass filter cleans up the signal, and a cheap audio amplifier reproduces the original audio.

Here’s a nostalgic vibe of an awesome analog chip from the 1990s era that’s still making an impact in audio designs.

Today, audio devices need to handle more functionalities between the headset and the audio converter, at least more that simply carrying the audio signal. But this capability cannot be handled ...