This circuit is from 1967 General Electric documentation. It uses SUS which are not very common components today. The maximum frequency should not exceed a few kilohertz.
This signal injector and tracer (follower) was found in an old American documentation. The...
This is a bridge for the measurement of low value resistances and high values too. The circuit...
This circuit was found in a 1968 documentation. The circuit generates three rectangular signals...