This circuit was suggested by Sprague Electric in an 80's documentation. The circuit uses a tachometric sensor for feedback. The current was not indicated in the original documentation.
The purpose of this circuit is to add millivolt scales to a common multimeter. Used transistors are...
I found this circuit in an old Argentine publication from 1973. The components are no longer...
The circuit is from the National Semiconductor Linear Applications Handbook published in 1994. The...