We found this circuit in an American documentation from the 80s. The integrated circuits are operational amplifiers of the time. We can test modern comparators like the LM339.
This passive circuit was found in a 1980s documentation. The circuit serves to indicate the...
We found this circuit in a 1969 General Electric documentation. The circuit uses transistors of the...
This circuit was obtained in a 1969 Mullard manual. The transistors are from that time. The input...