This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be applied to modern equivalent transistors.
This circuit is the receiver for the previous remote-control transmitter. We found it in the same...
We found this circuit in a documentation from the 90's. The circuit can be assembled with 741...
This circuit, with two operationals, was obtained from an old American publication. Operational...