This circuit was found in a 1968 General Electric documentation. It has an input impedance of 2 M ohms and excites a load of 16 ohms. The integrated circuit of the time is the PA237.
This circuit was found in an ancient American documentation. The transformer is the type used in...
We found this circuit in a Poptronics of the 90s. The circuit operates from 100 kHz to 30 MHz and...
The circuit shown is from the SGS manual of linear integrated circuits of 1982. The L78xx is...