发明名称 |
Sensor device |
摘要 |
The sensor device includes: a physical quantity voltage conversion element; a differential amplifier; a first capacitor that includes one terminal connected to a first output terminal of the differential amplifier; a comparator; a low pass filter circuit arranged at the first output terminal of the differential amplifier; a control circuit configured to on/off control the physical quantity voltage conversion element, the differential amplifier, the comparator, and the low pass filter circuit; and a logic circuit configured to output a result of operation processing performed on an output signal of the comparator. The logic circuit is configured to: successively verify, in a case where there is a change between a previous logic output and a first logic output, the logic outputs a plurality of times; and output a control signal to the control circuit so that the low pass filter circuit is turned on in a second signal processing period and thereafter. |
申请公布号 |
US9453888(B2) |
申请公布日期 |
2016.09.27 |
申请号 |
US201514664320 |
申请日期 |
2015.03.20 |
申请人 |
SII SEMICONDUCTOR CORPORATION |
发明人 |
Hikichi Tomoki;Ariyama Minoru;Fukai Kentaro;Miura Takemasa |
分类号 |
G01R33/00;G01R33/02;G01R33/06;G01R33/07;G01R1/30 |
主分类号 |
G01R33/00 |
代理机构 |
Brinks Gilson & Lione |
代理人 |
Brinks Gilson & Lione |
主权项 |
1. A sensor device, comprising:
a physical quantity voltage conversion element configured to output a differential voltage in accordance with a magnitude of a physical quantity; a differential amplifier configured to amplify an output signal of the physical quantity voltage conversion element; a first capacitor that includes one terminal connected to a first output terminal of the differential amplifier, and is configured to store an offset voltage; a comparator configured to input a signal obtained by amplifying the output signal of the physical quantity voltage conversion element, and to output a result of comparison; a low pass filter circuit arranged at the first output terminal of the differential amplifier; a control circuit configured to on/off control the physical quantity voltage conversion element, the differential amplifier, the comparator, and the low pass filter circuit; and a logic circuit configured to output a result of operation processing performed on an output signal of the comparator as a logic output, the logic circuit being configured to: successively verify, in a case where there is a change between a previous logic output and a first logic output, the logic outputs a plurality of times; and output a control signal to the control circuit so that the low pass filter circuit is turned on in a second signal processing period and thereafter. |
地址 |
Chiba JP |