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.
This circuit was originally designed with the operational 747 which is rare today. However, the...
This circuit was found in a 1970s documentation. The integrated circuit used is uncommon today....
This circuit is from a 1964 Electronic Design. The sensor is an LDR and the transistors are...