Differential Output Amplifier (CB6135E)

This circuit of old American documentation (1965) can be applied to any transistor.

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Dimmer (CB5270E)
This dimmer for incandescent lamps was obtained from an American 1990s documentation. The circuit...
Binary to decimal decoder using transistors (CB6588E)
We found this decoder in a 1966 General Electric publication. It makes use of general purpose...
Temperature Dependent Oscillator (CB931E)
The frequency produced by this oscillator depends on the temperatire sensed by a thermistor. The...