This circuit was obtained from an 80's Radio Electronics. The circuit decodes “scrambled” or sinusoidal encoded signals by providing an audio signal at the output.
This circuit uses matched transistors. The circuit is from Electronics Now magazine and has a...
Three 4011 NAND gates and two more components - a resistor and a capacitor make this oscillator very...
Using the HA2400 this circuit can generate signals of a few megahertz depending on R and C. The...