This circuit was found in an English operational documentation from 1970. The circuit can be implemented with modern operational amplifiers.
Suggested by Siliconix in 1980s documentation, this circuit uses currently uncommon components. The...
Figure bellow shows how n 4027 can be cascaded to form a divide-by-2. The maximum input frequency...
In the figure we have an interesting protection bridge against power polarity inversion of a...