This circuit generates a constant current given by R1. The load is on the high side of the feed (High Side). The circuit admits equivalent operationals and the source must be symmetrical.
The operation of this circuit is old, but the configuration can be elaborated based on modern...
This stage of IF to 455 kHz operates with voltages from 1.5 V. We find it in a 90s Popular...
This circuit is from a Japanese magazine from 1967. The circuit uses transistors from that time,...