High-accuracy analog Hall probe

Abstract

A Hall probe has been developed in the form of a miniaturized analog system, consisting of two silicon vertical Hall devices, current stabilizers, amplifiers, and error-correcting circuits. The output signal has a calibrated sensitivity of 1 V/T, with a residual error less than 10/sup -4/ in the ranges /spl plusmn/2 T, (15-35)/spl deg/C, and dc to 10 kHz. The probe features high long-term stability, low-offset drift, and low noise.