an mr die 10 on which an mr array 12 according to a first aspect of the present invention is depicted the mr array 12 is comprised of four magnetoresistor elements mr 1 mr 21 mr 22 and mr 3 wherein mr 1 spans the angle a 1 mr 21 spans the angle a 21 mr 22 spans the angle a 22 and mr 3 spans the angle a 3 the shape of the mr array 12 is preferably circular as depicted in fig1 a but may be otherwise mr 21 and mr 22 are the angle measuring elements whereas mr 1 and mr 3 are reference elements mr 22 is intended to provide a redundant angle measurement as required by many throttle position sensor specifications if redundancy is not required mr 22 may be absent generally and as shown in fig1 a angles a 1 and a 3 are equal and angles a 21 and a 22 are equal but this is not a fundamental requirement fig1 b and 1c show a portion of the mr die 10 in particular mr element mr 1 of the mr array 12 structurally mr element mr 1 consists of a plurality of mr segments 22 demarcated by uniform shorting bars 24 which are preferably gold the mr segments 22 are each uniformly matched to the others that is the mr segments are identical by way of preferred example each mr segment 22 is composed of indium antimonide insb epitaxial film mesas each epitaxial film mesa is provided by way of preferred example by forming an indium antimonide epitaxial film then masking and etching it the.