Title:
TIME DOMAIN A/D CONVERTER GROUP AND SENSOR DEVICE USING SAME
Document Type and Number:
WIPO Patent Application WO/2019/073663
Kind Code:
A1
Abstract:
Individual A/D converters constituting a time domain A/D converter group according to an embodiment of the present invention each comprises: a reference voltage selection circuit that is connected to a reference signal generation circuit for generating a first reference signal to sweep a full-scale range and a second reference signal to periodically sweep a limited voltage range a plurality of times and that switches between the first and second reference signals that are outputs of the reference signal generation circuit; a comparator that compares the first or second reference signal selected by the reference voltage selection circuit with an input signal; an internal A/D converter that implements an A/D conversion by use of a comparison output signal from the comparator; and a cumulative adder-subtracter that, if the second reference signal has been selected, outputs a signal obtained by averaging A/D conversion values obtained from the A/D conversion.
Inventors:
MATSUZAWA AKIRA (JP)
NOHARA MASAYA (JP)
NOHARA MASAYA (JP)
Application Number:
PCT/JP2018/028506
Publication Date:
April 18, 2019
Filing Date:
July 30, 2018
Export Citation:
Assignee:
TECH IDEA CO LTD (JP)
International Classes:
H03M1/56
Domestic Patent References:
| WO2015008634A1 | 2015-01-22 |
Foreign References:
| JP2017046318A | 2017-03-02 | |||
| JP2011160318A | 2011-08-18 | |||
| JP2013229708A | 2013-11-07 | |||
| JP2015152699A | 2015-08-24 |
Attorney, Agent or Firm:
TAKAHASHI, HAYASHI AND PARTNER PATENT ATTORNEYS, INC. (JP)
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