Circuit for selectively enabling and disabling coils of a multi-coil array
US6677755B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2002 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Sep 30, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/3415
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit for selectively disabling and enabling n-coils includes n-drivers disposed in a totem-pole configuration. Each of the n-drivers includes two FETs whose gates connect at a common node therefor. Each n-driver is used to operate one of the n-coils by being responsive at its common node to (i) a coil disable signal by activating one FET thereof and deactivating the other FET thereof drawing current away from and thus disabling its corresponding coil and allowing current to flow through the one FET and thus be available as a source of current to a successive one of the n-drivers and (ii) a coil enable signal by deactivating the one FET thereof and activating the other FET thereof thereby allowing current to flow serially through its corresponding coil and the other FET thus enabling its corresponding coil and to be available as a source of current to the successive n-driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.