This 80's Exar circuit has a carrier detector for frequencies up to 500 kHz. The circuit uses a company 567 which is still a common component.
This circuit is used to match a high impedance input source with a low impedance output device...
When the AC Power line fails, the transistors in this circuit are biased to conduce the current to...
This 80s signal follower makes use of an audio amplifier of the era. The circuit can be adapted to...