发明名称 |
Position detection apparatus and arithmetic processing unit |
摘要 |
Angle data ranging from 0° to 360° obtained by performing polar conversion with respect to a periodic signal are input to a low pass filter having: a phase accumulator for outputting smoothed angle data; a phase comparator for obtaining a phase error between the angle data and the smoothed angle data; a first amplifier for amplifying the phase error; a second amplifier for further amplifying the phase error; an integrator for integrating the phase error PE amplified by the second amplifier to obtain a velocity error; and an adder for adding the phase error amplified by the first amplifier and the velocity error to determine a control voltage. The phase accumulator controls the frequency of the smoothed angle data so that the phase error is zero based on the control voltage to remove a high frequency component in the angle data.
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申请公布号 |
US6772101(B1) |
申请公布日期 |
2004.08.03 |
申请号 |
US20000649539 |
申请日期 |
2000.08.28 |
申请人 |
SONY PRECISION TECHNOLOGY INC. |
发明人 |
TANAKA MASATO;ISHIMOTO SHIGERU;MATSUDA TOYOHIKO;KITAMURA KATSUMI |
分类号 |
G01B7/00;G01B7/30;G01B21/00;G01D5/244;G01D5/245;(IPC1-7):G01B7/00 |
主分类号 |
G01B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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