This common circuit using operational amplifiers was found in the 1993 issue of Radio Electronics Special Projects. The circuit is sandwiched between the pickup and the amplifier input.
This simple 3-channel passive mixer can be used with low-intensity signal sources but requires...
The circuit shown is from the Motorola Linear Databook of 1990. In the example, the components are for the...
This circuit uses a feedback system that latches the relay when closed. The circuit uses an...