Found in an Electronics World of 1968, this circuit is indicated for applications in photography making the control of a camera aperture. The components are from the time.
This circuit was obtained in Motorola documentation from 1969. The components are from that time. In...
We found this circuit in a Poptronics of the 90s. The circuit operates from 100 kHz to 30 MHz and...
We found this amplifier with 50 MΩ input resistance in the May 1989 Radio Electronics magazine. The...