Crystal oscillator (CB9637E)

Found in a 1980s American documentation, this circuit has a current consumption of only 1 mA. The crystal can be from 100 kHz up to a few megahertz.

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Current Amplifier (CB6136E)
This circuit was found in a British documentation from 1969. It can be implemented with modern...
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A simple VCO using two inverters in a ring configuration is shown here. A VCO is a circuit in...
Complementary Tourch Switch (CB3852E)
The four gates of a 40111 IC are used in thes two-out circuit. The output chages their state in a...