公开(公告)号：US11035876B2

公开(公告)日：2021-06-15

申请号：US16458903

申请日：2019-07-01

Applicant: HITACHI, LTD.

Inventor： Takashi Oshima ,  Yuki Furubayashi ,  Keijiro Mori ,  Naoki Mori ,  Akira Matsumoto

IPC: G01P15/125 ,  G01P15/13 ,  G01P15/08

Abstract: Provided is a sensor that is highly accurate while ensuring reduced power consumption. A sensor is an electronic circuit that includes a sensor element, an analog filter, an A/D converter, and first and second electronic circuit. The analog filter filters a waveform that includes a sensor signal from the sensor element and noise based on a servo signal. The A/D converter converts the waveform filtered by the analog filter into a first digital signal. The first electronic circuit includes a digital filter and acquires a second digital signal by performing signal processing including at least a filtering process on the servo signal by using the digital filter. The second electronic circuit acquires a third digital signal by subtracting the second digital signal from the first digital signal. A setting for the signal processing for acquiring the second digital signal is changed on the basis of the third digital signal.