Opto control for triac (CB20552E)

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

Fast Integrator (CB15890E)
The integrator in the figure is characterized by low input current and is based on an LM101A. C1...
Differential Multiplexer (CB5352E)
This circuit was found in an ancient American documentation. The integrated circuit is of the time...
Multipurpose Amplifier Module (CB13390E)
This circuit, from a 1976 documentation, amplifies signals from 100 Hz to 600 kHz with a voltage fan...