Crystal oscillator with compensation (CB9642E)

This temperature compensated circuit was found in a 1980s American documentation. The power supply is made with 5 V which allows its use as a shield.

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20 W Class AB Amplifier (CB6283E)
This circuit was suggested by General Electric in a 1969 documentation. The transistors are of the...
Transistor static switch (CB9287E)
This static switch circuit or solid-state contactor was found in a Motorola documentation from...
Constant current source (CB21725E)
In the figure we have a typical constant current source circuit. Transistor can be equivalent as...