Opto control for triac (CB20552E)

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

1-quadrant logarithmic converter (CB7333E)
This temperature compensated circuit was found in a Popular Electronics from the 90s. Integrated...
MPLAB® Mindi™ Analog Simulator with SPICE and SIMPLIS Environments
MPLAB Mindi Software Updated to Include Over 300 Device Models and Schematics CHANDLER, Ariz.,...
CA3080 Trigger (CB25138E)
Found in a May 1988 Radio Electronics issue, this is a Smitt trigger that requires a symmetrical power...