This traditional signal injector configuration was obtained in a 1977 amateur radio manual. The frequency is given by the capacitors and the supply can be made with 1.5 or 3 V.
This circuit was found in old documentation. Operational amplifiers can be almost any type. Design...
This circuit was found in an American magazine in 1976. It doubles the frequency of TTL signals in the...
The purpose of this 1-transistor amplifier is to allow the use of a milliammeter in an application...