This 130 V drive uses an integrated circuit not very easy to find, which is the LM143. The circuit is suggested by National Semiconductor in its 1994 Linear Applications Handbook.
Found in na 1970 EDN this circuit has a parallel regulation providing a symmetrical output of 15 V....
This circuit is from an American documentation from the 50's. The transistor is the CK721, and the...
The figure shows how to use an operational circuit as a voltage divider. The circuit is from a...