Modulated HeNe laser power supply (CB21186E)

This high voltage gas laser source was found in an American publication from the 1990s. The circuit has an input for PWM modulation.

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Flame Detector (CB17581E)
This circuit detects the presence of a pilot flame in heating systems by the presence of infrared...
SUS Frequency Divider (CB19903E)
In the figure we have a circuit that uses unusual components, being indicated for low frequency...
Triangular and square generator (CB21449E)
Found in older Signetics documentation, this circuit generates signals from 30 Hz to 25 kHz....