Patent ID: 6392400
Filing Date: 2002-05-21
Classification: G01R

Abstract:
A Hall effect sensor with improved output interface for high linearity and low offset performance, as associated with a given line voltage, comprising:a Hall effect device of the type having a substrate, first and second device inputs and first and second device outputs; an interconnection between said substrate and one of said device outputs; a biasing current supplied to said device proportional to the line voltage with which said device and interface are associated; plural pairs of inverting and non-inverting switch components connected between a given line voltage and said Hall effect device inputs, having controlled respective switching inputs commonly controlled by a modulation signal; and modulation means operative with the associated line frequency for generating said modulation signal with reference to a line frequency, wherein said modulation means includes first modulation means directly associated with the line frequency, for providing respective outputs with reference thereto and second modulation means for fine tuning adjustment of the output of said first modulation means and for supplying said modulation signal to said switch components for controlling switching thereof.