Microprocessor supervisor (CB9321E)

This circuit was obtained in a Maxim documentation from the 90's. The circuit applies to microprocessors of the time.

Self-biasing JFET stage (CB25566E)
This circuit was found in Electronics Now magazine and can be applied to any JFET. The circuit has high...
Operational Constant Current Source (CB13407E)
This circuit is from a 1977 National Semiconductor integrated circuits manual. The circuit admits...
Commercial 4-Transistor Radio (CB18321E)
This is a commercial radio circuit for 1967 AM. It was found in Japanese documentation. The...