This low-noise, low-drift amplifier was found in a 90's EDN. It can be implemented with modern equivalent operational amplifiers. The font must be symmetrical.
I found this circuit on a December 1976 Radio Elettronica. The Italian magazine no longer exists, but...
This power supply is not protected from shorts in the output. Output voltage is given by the...
Any power MOSFET that supports the current of the controlled stepper motor can be used on this...