This 3-digit circuit was found in the 1992 special edition of the Radio Electronics Handbook. The circuit produces a standard voltage for bench testing.
This filter that rejects determines frequency (notch) was found in a Popular Electronics of 1993....
This circuit operates with frequencies from 0.5 to 400 MHz. We find it in a 90’s NASA...
This circuit for adjusting sources simulating a load was found in a publication from 1993. The...