| 摘要 |
In a device for detecting a position of an object (linear or circular strip) moving in rotation or translation relative to a base, an incremental track bearing periodically recurring marks and two index tracks bearing a plurality of index marks are scanned by sensors. These sensors supply analog signals which are complementary to each other. In each case, two complementary signals are combined to form a logical track. By a combining of the logical tracks with each other, a further logical track is formed which contains a serial code which corresponds to the absolute value of the position of the object.
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