The purpose of this circuit is to improve a trigger circuit using a zener diode. The circuit was found in an American documentation from 1964. It can be improved using equivalent modern components.
In the diagram we show how to divide the frequency by multiples of 10 using several CMOS...
This circuit was found in a 1982 Maplin publication. The circuit is tuned to recognize a 400 Hz...
In the figure we have another application for the LT3518 integrated circuit from Linear Technology...