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.
The figure shows how to use a varicap in a conventional tuning circuit. The circuit may be an...
The CUT frequency for this filter is determined by the capacitors. The µA4138 is a quad version of...
The TTL 74123 integrated circuit consists of a monostable that can be configured to generate...