Found in a 303 Circuits from the 90s, this circuit converts signals from the 10 kHz to 150 kHz band to the 4.01 to 4.15 MHz band.
The circuit shown uses the 741 operational amplifier, but lower noise and higher gain equivalents...
The frequency generated by this circuit depends on the crystal used. Frequencies up to a few tens...
Found in a 1965 Electronic Design, this circuit divides the frequency of a 50 MHz signal by 2. The...