Title:
ELECTRICAL SIGNAL PROCESSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/084917
Kind Code:
A1
Abstract:
[Problem] To provide an electrical signal processing device which, when f1 and f2 (f2>f1) represent the frequencies used for two frequency measurement in a SAW sensor, is capable of achieving temperature compensation having an accuracy equivalent to when a dual-system frequency lowering circuit or oversampling at a frequency of at least two times f1 is used, without using the dual-system frequency lowering circuit or the oversampling. [Solution] Narrow-band frequency filtering is applied to a cyclic waveform in a delay-line-type SAW sensor capable of transmitting and receiving a plurality of frequencies, two frequencies (f1, f2) (f2>f1) are extracted, and the aliasing obtained as a result of applying, to the two frequencies, undersampling at a frequency lower than two times f1, is used to determine the delay time.
Inventors:
YAMANAKA KAZUSHI (JP)
TSUJI TOSHIHIRO (JP)
OIZUMI TORU (JP)
TSUJI TOSHIHIRO (JP)
OIZUMI TORU (JP)
Application Number:
PCT/JP2015/083290
Publication Date:
June 02, 2016
Filing Date:
November 26, 2015
Export Citation:
Assignee:
UNIV TOHOKU (JP)
International Classes:
G01N29/02; G01N29/24; G01N29/42; G01N29/44; H01L41/04; H01L41/113
Foreign References:
| JP2006071482A | 2006-03-16 | |||
| JPH11142425A | 1999-05-28 | |||
| JPS59147258A | 1984-08-23 | |||
| JP2015087271A | 2015-05-07 |
Other References:
See also references of EP 3225985A4
Attorney, Agent or Firm:
SUDA Atsushi et al. (JP)
Atsushi Suda (JP)
Atsushi Suda (JP)
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