Title:
物理量検出回路、物理量センサー、電子機器、移動体及び物理量センサーの故障診断方法
Document Type and Number:
Japanese Patent JP7243485
Kind Code:
B2
Abstract:
A physical quantity detection circuit includes: a detection signal generation circuit generating a detection signal, based on an output signal from a physical quantity detection element; an analog/digital converter circuit converting the detection signal into a first digital signal and converting a test signal into a second digital signal; a test signal generation circuit generating the test signal; and a malfunction diagnosis circuit diagnosing a malfunction of the analog/digital converter circuit, based on the second digital signal. A full-scale voltage of the analog/digital converter circuit is selected from among a plurality of voltages having different magnitudes, according to a power supply voltage. The test signal includes an upper limit value test signal, a lower limit value test signal, and a first intermediate value test signal. The test signal generation circuit performs resistive voltage division of the full-scale voltage and thus generates the first intermediate value test signal.
Inventors:
Kinnori Nakajima
Application Number:
JP2019119441A
Publication Date:
March 22, 2023
Filing Date:
June 27, 2019
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
G01C19/5776; G01P21/00; H03M1/10
Domestic Patent References:
| JP2018165641A | ||||
| JP2007309773A | ||||
| JP2006512679A | ||||
| JP2009244019A | ||||
| JP2012129687A |
Attorney, Agent or Firm:
Fuse Yukio
Michie Obuchi
川▲崎▼ 通
Mitsufumi Matsumoto
Michie Obuchi
川▲崎▼ 通
Mitsufumi Matsumoto
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