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.
The operational Amplifier used in this circuit is uncommon today. However, the same circuit can be...
This small blocking oscillator for approximately 1000 Hz was found in an American documentation from the...
We found this circuit in a Radio & Electronics Constructor from November 1975. The magazine no longer...