Physical quantity sensor
US8127603B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 2007 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Oct 30, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D3/024
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A physical quantity sensor includes a sensor element that converts an externally applied physical quantity to an electrical signal; a detection circuit that amplifies and detects the output signal of this sensor element; and an adjustment circuit that adjusts the output signal from the detection circuit to a predetermined signal by applying the power supply wherein the adjustment circuit comprises an amplifier circuit that amplifies the output signal from the detection circuit and a reference amplifier circuit that has a gain that is made to correspond to the gain of the amplifier circuit. This configuration allows the gain of the amplifier circuit in the adjustment circuit to be varied according to the power supply voltage and, as a results, provides a physical quantity sensor having reliable sensor detection sensitivity and high-accuracy ratiometric characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.