Title:
デジタルフィルター、レシプロカルカウント値生成回路および物理量センサー
Document Type and Number:
Japanese Patent JP6787105
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a digital filter, a reciprocal count rate creation circuit, and a physical quantity sensor that can reduce a circuit scale and reduce power consumption.SOLUTION: A digital filter processes a delta-sigma modulation signal subjected to frequency delta-sigma modulation and comprises a plurality of filters including at least one moving average filter, where a bit width of a first signal output from a predetermined filter of the plurality of filters is made smaller than a bid width of a second signal processed by the predetermined filter by reducing the number of bits including the least significant bit. It is preferable that a signal output from the at least one filter of the plurality of filters is down-sampled.SELECTED DRAWING: Figure 1
Inventors:
Todoroki Masayoshi
Application Number:
JP2016246006A
Publication Date:
November 18, 2020
Filing Date:
December 19, 2016
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
H03H17/06; G01P15/10; G01R23/15; H03H17/00
Domestic Patent References:
| JP2007143196A | ||||
| JP2011080836A | ||||
| JP2015220552A | ||||
| JP2010122191A |
Attorney, Agent or Firm:
Tatsuya Masuda
Kazuo Asahi
Kazuo Asahi