This lockable two-position servo control system was found in documentation from the 1990s. The error amplifier can be an operational amplifier and the sensors are phototransistors.
This circuit came out in a publication called Electronics Handbook of 1993. The circuit shows how...
This is the conventional version of capacitance multiplier with operational amplifier that appears in...
) The integrated circuit used in this control is uncommon today and the maximum current obtained allows...