This power control circuit was found in General Electric documentation from 1969. The table provides the components for different types of loads. The integrated circuit is uncommon today.
Found in a 1979 documentation, this circuit measures resistances on 5 linear scales. The precision is...
This circuit, from 1990 documentation, can be assembled with BC558 transistors for Q1 and Q2,...
Found in American documentation from the 90's, this JFET stage has an input impedance of 500 M...