This circuit is from the 1990 Motorola Data Databook. The circuit can be implemented with equivalent transistors. The power supply must be symmetrical.
We found this circuit in a European publication from the 1990s. Transistors are still common types...
The circuit shown bellow is na áudio amplifier using Darlington transistor in a complementary...
This circuit uses one of the 6 CMOS inverters of a 4060 as a touch on / off switch. The power...