We found this circuit in a Hands-On Electronics from the 90s. The circuit must be connected to an external amplifier. Frequency control is capacitive, using an antenna for this purpose
Found in an American documentation from the 90s, this circuit has a configuration that has been...
This Ditherizing circuit is used in digital audio for effect production. The circuit is from a...
This PLL with operational amplifiers was found in 1969 documentation. The configuration can be...