Volume expander amplifier (T364E)

This circuit was found in the 1961 RCA tube manual. The circuit includes a power supply stage.

Inverter and Limiter with 741 (CB13522E)
This circuit is from an American publication from 1974. It, at the same time, limits the intensity of...
Modulated Siren (CB6024E)
A modulated (flashing) siren using the four gates of the 4001 integrated is shown in the figure....
CMOS Amplifier (CB24798E)
The figure shows how to use CMOS inverters as amplifiers. The circuit is from a Radio Electronics from...