Found in a 1968 American documentation, this circuit uses an operational amplifier that is uncommon today. The feed must be symmetrical. The gain is 40 dB.
Indicated for applications in the analysis of logic circuits, this circuit was found in 90s Radio...
This circuit is from 1977 documentation, and high current equivalent transistor must be used. The...
Found in an Electronic Design, this circuit makes use of general-purpose bipolar transistors. The circuit...