Title:
SIGNAL PROCESSING DEVICE AND CONTROL METHOD FOR SIGNAL PROCESSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/097327
Kind Code:
A1
Abstract:
A signal processing device and a control method therefor according to the present invention comprises, a filter circuit that is configured to have a first capacitor and that reduces a predetermined frequency component of an analog signal, a sample hold circuit that is configured to have a second capacitor and that samples and holds the analog signal having passed through the filter circuit, and an A/D conversion circuit that converts an output signal from the sample hold circuit to a digital signal, wherein the second capacitor is charged by applying a predetermined voltage to the second capacitor, and thereafter the sample hold circuit is caused to sample the analog signal having passed through the filter circuit. In this way, the time to charge the first capacitor is suppressed and the error of the digital signal is reduced.
Inventors:
HIRAKI NAGAMORI (JP)
KOSEKI TOMONOBU (JP)
KOSEKI TOMONOBU (JP)
Application Number:
PCT/JP2021/024511
Publication Date:
May 12, 2022
Filing Date:
June 29, 2021
Export Citation:
Assignee:
HITACHI ASTEMO LTD (JP)
International Classes:
H03M1/12; G01D5/12; G01D5/245
Foreign References:
| JP2001223586A | 2001-08-17 | |||
| JP2001264114A | 2001-09-26 | |||
| JP2013502158A | 2013-01-17 | |||
| JP2011077847A | 2011-04-14 |
Attorney, Agent or Firm:
OGAWA, Moriaki et al. (JP)
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