This circuit was found in an ancient American documentation. With it is possible to double the frequency of a transmitter For the range of 6 meters obtaining 8 W. The circuit makes use of varicap.
Devices Feature Open Immobilizer Protocol for Interoperability and Low Frequency Vector Techniques for...
This circuit is from an American 80's documentation. The integrated circuit is from the time and...
The frequency of TTL square signal is divide by 5 with this circuit. Power supply is 5 V and the...