Sensor IC
US5640090A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Dec 28, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/07
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sensor IC generates a voltage according to magnetic flux density of an applied magnetic field. The sensor IC includes a plurality of Hall sensors having an identical shape formed adjacent to each other in a semiconductor chip, each of the Hall sensors generating a sensor output voltage which includes a Hall output voltage component in proportion to the magnetic flux density. The sensor IC further includes a plurality of differential amplifiers having an identical circuit formed adjacent to each other in the semiconductor chip, each of the differential amplifiers multiplying the sensor output voltage produced from a corresponding one of the Hall sensors by a given gain. In the sensor IC, by a summing circuit, output signals produced from the plurality of differential amplifiers are summed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.