Patent ID: 6878927
Filing Date: 2005-04-12
Classification: G01D,H03M

Abstract:
1. A position detector for determining the position of a movable object, the position detector comprising: a first rotary member encoded to generate a first subcode having a first predetermined bit length, the first subcode selected from sequential bits of a code word having a second predetermined bit length larger than the first predetermined bit length, the first subcode having the property that every selected subcode has a unique value; a second rotary member encoded to generate a second subcode having a third predetermined bit length selected from sequential bits of a code word having a different bit length than the first rotary member, the second subcode having the property that every selected subcode selected from the second rotary member code word has a unique value; and a controller, responsive to the first subcode and the second subcode, for generating a multibit code, comprising a combination of the first and second subcodes, wherein the multibit subcode is representative of a unique position output, the position output indicating a position of the movable object in its travel.