Driver for oscillograph (T459E)

This circuit from an old MIT documentation excites an oscillograph element, an old waveform viewer.

20 MHz Oscillator (CB8135E)
Found in a 1967 EEE, this circuit oscillates at 20 MHz according to the values of the given...
Audio Stage with Bootstrap (CB12203E)
In the figure we have an amplifier step configuration with a transistor suggested by a 1985...
5 mA Constant Current Source (CB25615E)
This constant current circuit was found in the October 1993 Electronics Now magazine. The current can...