Chopper amplifier circuit and semiconductor device
US7479826B2 · kind B2 · utility
2Cited by
8References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 4, 2006 |
| Grant date | Jan 20, 2009 |
| Priority date | — |
| Expiry date | Aug 23, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45775
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Provided is a chopper amplifier circuit capable of reducing an offset voltage of a sensor bridge and temperature characteristics of the offset voltage. An offset adjusting voltage generation circuit for generating a voltage equal to an offset voltage of a sensor bridge and an offset temperature characteristics adjusting voltage generation circuit for generating a voltage having temperature characteristics equal to those of the offset voltage are provided. These output voltages are chopper-modulated and subtracted from a chopper-modulated output signal of the sensor bridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.