| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly precise original point data by simple and inexpensive constitution, and to allow common use as an absolute encoder. SOLUTION: A position signal processing circuit to highly precisely providing a fine origin position data Zm having a narrow pulse width with the proviso that an interpolated data comes to a specified value within the pulse width or in the vicinity of an origin position data ZR, based on high resolution incremental signals Am, Bm prepared from the interpolated data. Following values may be allowed as the specified value of the interpolated data. (1) only the maximum value is used, and the Zm in one section of the interpolated data is made high, (2) the Zms for four sections of the interpolated data are made high using the maximum value, the maximum value -1, or 0 or 1, (3) a central value (the maximum value +1)/2 of the interpolated data, or (the maximum value +1)/2-1 is used, (4) the ZR. an AR. (the maximum value or 0) signal is used, which is provided by inputting an AR signal to an AND circuit.
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