We found this circuit in a Radio Electronics from October 1963. The circuit uses an output transformer with a center tap. The trimpot is adjusted for higher gain and lower quiescent current.
This circuit was found in an American documentation from 1969. It serves to trigger circuits by...
The configuration presented below was obtained in the Linear Application Handbook of the National...
Found in an Electronic Design from the 90s, this circuit uses components from the time. It is...