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 stage for general purpose transistors was taken from an old technical manual. The circuit can...
This circuit appears several times on our website and in this section, for various purposes and minor...
We found this circuit in Motorola's 1993 Linear Interface ICs. The power supply does not have to...