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.

Regulator with tunnel diode (CB23584E)
Yes, tunnel diodes can also be used in voltage regulators, as shown in this circuit from a Radio...
1 kHz Tuned Filter 741 (CB19118E)
The gain of this circuit at 1 kHz [and 40 dB falling rapidly when the frequency deviates from this...
Relaxation oscillator with operational (CB25191E)
A frequency of up to a few kilohertz can be obtained with this oscillator. The frequency is given...