Opto control for triac (CB20552E)

Found a documentation for PC from 1992, this circuit is indicated for the English power grid of 240 V.

Medium Power Amplifier (CB4460E)
This is a traditional configuration of a transistor amplifier with complementary transistors that can be...
Gain 10 Amplifier with the L161 (CB4910E)
This circuit is from the 80's component manual itself, but can be applied to more modern...
Burst Generator (CB6072E)
This circuit was found in a Signetics documentation from the 1980s. The integrated is a PLL and...