This circuit has a correction or linearity adjustment. We found it in Ferranti's transistor manual from 1974. Transistors are general-purpose types at the time.
This type of circuit and with this integrated circuit appears several times on this website. The...
Using transistors of the time, this circuit was published in Radio Electronics magazine in...
The integrated circuit used in this 1982 project is not very common today. It can be adapted to...