This circuit is from an Electronics World of 1968. The transistors are of the time and the power is supplied with a voltage of 40 V. The circuit is high fidelity.
This 2000 circuit can be used to match the low impedance of a microphone to the high input...
Figure Bellow shows how to interface CMOS circuitos with TTL using the 4049 or 4050 IC. The power...
The basis of this circuit is a National Semiconductor operational amplifier that functions as a...