Using the name of varactor this circuit was found in the Radio Electronics magazine of July 1982. Varicaps of any type can be used and the components selected according to the component.
Found in Philips' 1967 documentation, this circuit makes use of period components. The SCR can be...
The circuit presented, from the Analog Devices linear integrated circuits manual, has compensation for...
This circuit uses a 741 operational amplifier that must be powered by a symmetrical source of 6 to...