Semiconductor device, angle value correction circuit and method therefor
US10969400B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 29, 2018 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | May 28, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/72
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In order to correct the rotation angle value without an increase in the circuit size, a rotation period measurement unit measures a rotation period of a rotary shaft in which a rotation angle is detected by using a resolver that outputs a signal corresponding to the rotation angle of the rotary shaft. A rotation speed calculation unit calculates the rotation speed of the rotary shaft based on the rotation period. An acceleration calculation unit calculates the rate of change of the rotation speed per interval when a given rotation angle of the rotary shaft is divided into 2n+1 intervals, in which n is an integer of 1 or more. An estimated angle calculation unit calculates the rotation angle estimation value, assuming that the rotary shaft performs a uniform acceleration motion, based on the rotation speed and the rate of change of the rotation speed. A correction value calculation unit calculates the correction value of the rotation angle value converted from the output signal of the resolver. A correction value application unit generates a corrected angle value by applying the correction value to the rotation angle value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.