Half Wave Fast Rectifier (CB5160E)

This 80's circuit can be made with current comparators. Rectification accuracy is 1% DC up to 100 kHz.

Constant current motor drive C (CB20784E)
This current control for DC motors was found in documentation from the 1970s. The current depends on...
8086 (CB16012E)
In the figure we pin the 8086, Intel's 16-bit microprocessor. It is manufactured according to...
DAC with the 7490 (CB13558E)
This simple 4-bit digital-to-analog converter was found in a 1974 publication. The transistors can be the...