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.
Found in a 1965 Electronic Design, this circuit produces a signal with the waveform shown in the...
This is a circuit that should not be used for readers interested in a fair game. The circuit...
This circuit receives the signals from the previous circuit (CB19055E) by activating an electric lock...