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.
Found in a 1999 documentation, this circuit makes use of a power germanium transistor and a...
This circuit is an excellent application for the PIC in audio, but the reader who intends to do...
This TTL circuit generates a 100 MHz signal for digital instruments. The CI is not easy to obtain,...