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Position transducer | Weggeber | Capteur de position

Patentnummer:EP1342992B1
IPC Hauptklasse:G01D0005244
Anmelder:
Erfinder:Kusumi, Masaaki (0)
Sony Precision Techn. Inc., ; 9-17, Nishigotanda, 3-chome, ; Shingawa-ku, ; Tokyo, JP
Nekado, Yasuo (0)
Sony Precision Techn. Inc., ; 9-17, Nishigotanda, 3-chome, ; Shingawa-ku, ; Tokyo, JP
Anmeldung:28.02.03
Offenlegung:05.03.02
Patenterteilung:29.11.17

Abstract / Hauptanspruch
There is provided a position transducer (1) capable of accurately detecting an n-bit code by n ABS detectors from one ABS track. When an INC value is under j or over k, signal output from each of the ABS detectors is binarized based on a threshold h and also based on a threshold l. First, an ABS value decider (24) decides that a bit is "H" when it has been judged as being "H" on the basis of both the thresholds and a bit is "L" when it is has been judged as being "L" on the basis of both the thresholds. When the INC value is under i, a lower bit has the same code as that of the deiced bit. So, the ABS value decider (24) decides that the lower bit is "H" or "L". On the other hand, when the INC value is over k, an upper bit has the same code as the decided code. Thus, the ABS value decider (24) decides that the upper bit is "H" or "L". The ABS value decider (24) decides a yet-to-decide bit to be "L" when a bit adjacent to the bit is "H", and "H" when the adjacent bit is "L".

EP1342992B1


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