This circuit was found in Sgnetics documentation from the 80's. The circuit also has loudness control. The power supply must be symmetrical.
May 2016 - It can be obtained from Mouser Electronics new connectors Ultra-Fit ™ series from Nikex for...
This circuit produces a signal in the range corresponding the the VHH channels between 2 and 6....
This circuit indicates whether the voltage to be measured is higher or lower than the zener diode...