Additional Pull Pull (CB6119E)

This stage was found in a 1964 Electronic Design. The transistors are of the time and the shape of the signal obtained is shown in the diagram.

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Simple Night Switch 2 (CB4563E)
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We found this circuit in a European publication from the 1990s. Transistors are still common types...
Operational with 1 A output (CB25183E)
The figure shows how to add a Darlington stage to an operational amplifier in order to obtain a...