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 code practice oscillator was found in an English publication from the 80's. The circuit can...
This circuit that also has a Power On reset was obtained from a 2005 Linear Technology manual. The...
This circuit is based entirely on TTL gates. The circuit must be powered by a voltage of 5...