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US7999644B2 · kind B2 · utility
4Cited by
11References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2008 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Sep 17, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/9515
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A central magnet of a plurality of magnets arranged to be different in polarities is detected by two hall ICs; therefore, reduction in size can be achieved by reducing the number of the magnets; and at the same time, the number of the hall ICs can be maintained and the reliability can be secured, as compared with a configuration in which the magnets and the hall ICs individually respond in one to one correspondence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.