In the figure we have an IF amplifier step using a MOSFET. The circuit was found in a 1980s documentation, intended for FM receivers of the time.
Using the CA3140 integrated circuit, this switch was found in the June 1986 Radio Electronics...
This circuit was found in the May 1983 issue of Radio Electronics magazine. The SSM7046 integrated...
This circuit was obtained in an Electronics Now of the 90s. The circuit monitors the DIN connector of...