Magnetic field sensor for a keyless access system for motor vehicles
US5940003A · kind A · utility
16Cited by
4References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1998 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Mar 26, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00777
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A magnetic field sensor for a keyless access system, particularly for motor vehicles, wherein the direction of incidence of electromagnetic radiation emitted by a transmitter in the short-range field can be detected. The magnetic field sensor has at least one first and at least one second conductor loop, which are disposed substantially concentrically with one another and are substantially symmetrical with respect to the center.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.