This space mark demodulator for FSK signals was found in an American telecommunication documentation from the 1980s. The circuit operates with 2025 Hz and 225 Hz mark space signals.
This circuit was found in a 1967 General Electric manual. It is intended for the control of high...
This basic oscillator with tunnel diode generates a 100 kHz signal with 1 uW output power. The...
The frequency of this circuit, that makes use of a tunnel diode as an active element, depends on...