From an audio signal, this circuit gets two signals of the same amplitude and opposite phases. This setting is widely used in bridge amplifiers (BTL). Transistors may be commonly used as BC series.
The figure shows how to use a varicap in a conventional tuning circuit. The circuit may be an...
We found this circuit in the January 1992 issue of Radio Electronics magazine. The circuit...
This filters blocks radio interference or noise coming from the AC Power line. Noise such as the...