Broadband Amplifier (CB21859E)

This circuit has a voltage gain of 30 times and passband of 14 MHz. The circuit is from the 1974 Ferranti transistor manual.

Integrated AM Radio (CB20268E)
This circuit that uses potentiometer tuning, was found in a documentation from the 80's. The...
Ignition for cars with positive ground (CB23628E)
Another electronic ignition circuit for cars with positive ground. This circuit is from a Radio...
Biquad Filter MC4741 (CB14466E)
The MC4741 integrated circuit consists of four operational amplifiers similar to the 741 in a...