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 filter can be implemented with almost any operational. The power suppply must be symmetrical. ...
This traditional circuit of old documentation uses a 0-1 mA milliammeter and has several scales....
This simple 2-transistor radio is from Radio Electronics in October 1952. The circuit outputs a...