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.
We found this circuit in an American documentation from the 90s. Through an LED it indicates the...
August 2016 - It can be purchased from Mouser Electronics the new digital isolators ADuM120N and...
In this circuit, from a documentation from the 70's, we have the way to control the active cycle of...