This circuit was obtained from HAM Radio magazine in an 80's issue. The FETs are types of the time and the frequency is determined by the crystal. The circuit operates at voltages from 3 to 9 V.
The resonant circuit depends on the crystal frequency that can go up to a few megahertz. The...
Found in Linear Technology documentation from the 90s, this circuit uses an operational amplifier...
Found on Popular Electronics this circuit has variations found throughout this site and section....