Precision AD Converter (CB9026E)

This circuit from the 70s uses components from that time. The converter and SAR are components that are difficult to obtain today.

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4 and a half digit ADC ICL7106 LCD (CB15352E)
This circuit is from the 1983 Intersil Databook. This is a configuration that is still used today...
SCR Optical Full Wave Control (CB13766E)
This shield circuit, from a documentation from the 70s, employs an optocoupler with two SCRs to...
Treble Cut Filter (CB15198E)
We found this circuit in the 1982 SGS Linear Integrated Circuits manual. The integrated circuit used...