This differential amplifier, found in a 1964 Electronic Design, has a gain of 30. The setting can be applied to modern equivalent transistors.
Found in 1967 General Electric documentation, this circuit is intended for the control of...
We found this amplifier in a publication of 1990, but it can be mounted today with some exchanged...
This circuit has an oscillator triggered when the microphone picks up sounds, noises or even...