This circuit incorporates the passive control of the previous circuit and was also found in the March 1995 Electronics Now magazine. The power supply must be symmetrical.
This circuit came out in a Popular Electronics from December 1995. It is a double T configuration that...
This low power amplifier, with 2 W in charge of 16 ohms, was found in a Japanese magazine from the...
This circuit was found in a 1967 US documentation. It shows how to build a gain control by digital...