This mixer with 20 dB gain per channel uses RCA's CA3048 integrated circuits. We found it in the July 1971 Radio Electronics magazine. The power supply does not need to be symmetrical.
A rectangular signal applied to the input of this circuit becomes a negative pulse, which...
This circuit was found in a 1980 publication, but it can be assembled using a BD135 for Q1 or even...
This circuit, suggested by Sylvania in a 1956 publication, serves as an experimental stage for a...