This circuit with 1W of output was found in a Mullard manual from 1960. The consumption is low and germanium transistors of the time are used.
This circuit is from a Popular Electronics from the 90s. Its gain is 22 dB and can be used as a...
This circuit was found in an article in Radio Electronics magazine from October 1962. At that...
This circuit can be implemented with other operational amplifiers. The formulas for calculating the...