From an audio signal, this circuit gets two signals of the same amplitude and opposite phases. This setting is widely used in bridge amplifiers (BTL). Transistors may be commonly used as BC series.
This circuit can turn-on (only) a load (relay or lamp) when S1 is pressed. The circuit can be used as...
We found this filter in the 1990 Motorola Linear Databook, but it can be implemented with other...
This 1969 Philips documentation circuit makes it possible to control an engine through the sound...