This amplifier with gains between 5 and 100 was found in the May 1988 issue of Radio Electronics magazine. The circuit requires a symmetrical power supply.
This commercial circuit is from a Japanese magazine from 1967. It uses germanium transistors, and...
We found this circuit in a 1967 Electronic design. However, it can be easily implemented even...
This circuit for measuring bridges was found in American documentation from the 60's. Transistors are...