FM stages with tunnel diode (CB22545E)

This FM receiver input circuit with tunnel diodes was found in documentation from 1952. The circuit has good gain and has low supply voltage.

Buffer for AD converters (CB9318E)
This circuit was obtained from Linear Technology documentation from the 90's. The circuit uses...
AGC Wien Bridge Oscillator (CB12739E)
In the figure we have a typical Wien Bridge oscillator with AGC. The negative waveform is sampled by...
Divider by N 4017 (CB25914E)
In the figure we have one of the many ways to program the counting of a 4017. The circuit uses...