Balanced Modulator MC1594 (CB14588E)

This circuit is from the Motorola Linear Databook from 1990. The integrated circuit used is uncommon today.

Voltage Controlled Amplifier (CB24285E)
This circuit is part of a synthesizer that was published in parts in several issues of Radio...
Simple Symmetric Power Supply (CB11921E)
This symmetrical or dual source without regulation is indicated for the feeding of experimental projects...
Fast Summing Amplifier (CB15892E)
Integrated LM108 and LM101A are used in this fast adder with low input current, figure. The...