Sensor circuit
US8901966B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 2014 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Feb 12, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/2481
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Provided is a sensor circuit which can amplify a sensor signal at high speed and with a high amplification factor without increasing the current consumption. The sensor circuit includes a primary amplifier for amplifying in advance a differential output signal which is a current signal of a sensor element, a secondary amplifier for amplifying the amplified differential output signal, a constant voltage generating circuit for maintaining a sensor element driving current to be constant, and a feedback circuit for feeding back a feedback signal to adjust an amplification factor. Most of the currents which pass through the primary amplifier are bias currents of the sensor element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.