Found in a 90’s Popular Electronics, this circuit can use other power MOSFETs. The transformer has a primary according to the desired continuous voltage at the output.
This well-known configuration was found in a 1982 publication. Other operational amplifiers can be...
Suggested by General Electric in 1965 documentation this circuit is intended for the 120 Vac...
Combined with the two previous circuits, we can create a simple multimeter with this circuit. The...