Regulators Using Hall-Effect Devices for Multiplier Sensors

In the design of regulators it is desirable that the quantity to be regulated should be sensed directly in the form most nearly corresponding to the regulated quantity. The Hall-effect device is a sensor which provides an output voltage proportional to the instantaneous product of a magnetic field in one axis, and a current in the second axis and, hence, makes possible the direct sensing of the product of any two quantities that can be converted to currents.