This circuit for audio signals was found in the March 1990 Radio Electronics magazine. The circuit uses a unusual optocoupler that can be replaced with an equivalent one.
Microchip's EQCO62X20 6.25Gbps Asymmetric Coax Equalizer is a driver/equalizer chipset that forms...
This circuit was obtained in an old Linear Technology documentation by applying to the monitoring of...
This interesting circuit is nothing more than a joke. Of course it can be used for other purposes....