Burroughs, Inc.

Chung-Herng Hsin

Sidney J Schwartz

Farooq M Quadri

A method of forming detector and dummy detector pair(s) of magnetoresistive elements on a bubble memory chip, with detector and dummy detector each having a balancing resistance network comprising parallel spaced apart end-connected lines of resistive material with the transverse legs (rungs) spaced between said parallel lines to form a ladder in-line (electrically) between the detector and pads for selectively balancing the pair(s), and for disconnecting certain rungs of the spaced apart end connected lines, if necessary, to change the path of current flow through the ladder and thus vary the resistance through the ladder. The product formed by the method comprises on-chip magnetoresistive detector element pair(s) including balancing resistance ladders, coupled in the current paths of the magnetoresistive elements, and having portions which can be selectively disconnected to change resistance of the ladder to balance the bridge network.

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Irvine, CA, United States of America

Chung-Herng Hsin