The frequency of this Pierce oscillator, found in 1969 documentation, depends on the crystal. The current in the drain is about 500 uA. Crystals from other frequencies can be used.
This circuit was obtained in a Radio Electronics of the 90s. The circuit uses an integrated circuit...
This is the traditional configuration of na Astable Multivibrator using two NPN ttransistor....
Found in the 1995 Encyclopedia of Electronic Circuits volume 5, this circuit has a constant...