Patent ID: 8872292
Filing Date: 2014-10-28
Classification: G01R,H01L

Abstract:
1. A single-package push-pull half-bridge magnetic field sensor comprising: one or more pairs of MTJ or GMR magnetoresistive sensor chips, wherein one of the MTJ or GMR magnetoresistive sensor chips in each pair is rotated 180 degrees with respect to the other, and the MTJ or GMR magnetoresistive sensor chips are adhered to a semiconductor package lead frame; each MTJ or GMR magnetoresistive sensor chip contains one or more MTJ or GMR sensor elements interconnected as a single magnetoresistive element or a plurality of MTJ or GMR magnetoresistive elements, wherein the single element or the plurality of elements is referred to as a bridge arm; the MTJ or GMR magnetoresistive elements have a resistance that is linearly proportional to an applied magnetic field over some portion of their magnetoresistive transfer curve; each of the MTJ or GMR magnetoresistive sensor chips has substantially the same R the bond pads of the MTJ or GMR magnetoresistive sensor chip are designed such that more than one wire bond may be attached to each side of the bridge arms; and the MTJ or GMR magnetoresistive sensor chips are wire bonded to each other and a semiconductor package lead frame in order to produce a push-pull half-bridge sensor.