This high impedance circuit was found in 1967 documentation by Ferranti. The original operational amplifier is from that time. The circuit can be implemented with modern equivalents.
We found this circuit in the 1974 Ferranti transistor manual. Transistors are from the time, being...
This circuit includes a power stage with an integrated circuit that is uncommon today. Equivalents can be...
With this circuit, a common multimeter can be used to check if there is a microwave leak in a...