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.
Although it is a common configuration today, these circuits were taken from an old publication. The...
Found in Popular Electronics from the 1980s, this circuit uses two operational amplifiers from...
This circuit is from an Electronics World of 1967. The described calculations can be applied to...