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 found in a 1973’s Japanese magazine. It uses transistors of the time and is...
This operational amplifier configuration has gain controlled by an external voltage applied to a...
With the presented circuit it is possible to measure resistances of many megohms using a low...