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.
We found this receiver in old documentation. The transistor is made of germanium and the...
This conventional 4 channel circuit with the 4017 and 555 was found in the November 1991 Radio...
In the figure we have the basic configuration for interfacing TTL logic with CMOS logic. The...