The circuit shown here is based on the switching action of transistors, which produce a digital up/down control of an amplifier volume. Volume of a stereo deck can be controlled […]

This logarithm amplifier circuit provides an output voltage that is equivalent to the logarithm of applied input voltage. The performance of the logarithmic operational amplifier, the circuit diagram of which […]

In numerous occasions it is desirable to obtain an amplifier that gives an output signal of constant amplitude for numerous input signal levels and with the very least distortion. A […]

This circuit can be used with a stereo headphone for amplifying a low level input signal into a sufficiently high output signal in the headphone. The circuit diagram of the […]

This Circuit will automatically control the loudness of headphone amplifier volume, so that the is able to listen to the music at the correct level. Numerous contemporary top quality amplifiers […]