Title:
BIOLOGICAL INFORMATION MEASUREMENT DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/045938
Kind Code:
A1
Abstract:
A biological information measurement device (1) is provided with: a phase frequency comparator (21) for outputting a deviation signal corresponding to the phase difference between a biological signal and an oscillation signal; a variable loop filter (22), which is capable of varying a cutoff frequency and phase margin, and selectively blocks a signal in a specified frequency band contained in the deviation signal; a voltage controlled oscillator (23) for generating/outputting an oscillation signal according to the deviation signal passing through the variable loop filter (22); a biological signal analysis unit (30) having a S/N analysis unit (31) for estimating the S/N ratio of the biological signal, and a PF analysis unit (32) for analyzing the phase difference/frequency difference between the biological signal and the oscillation signal from the output of the phase frequency comparator (21); and a parameter control unit (40) for modifying the constant of the variable loop filter (22) on the basis of the SN ratio and phase difference/frequency difference.
Inventors:
HAYASHI TAKANORI (JP)
SATO YASUSHI (JP)
SATO YASUSHI (JP)
Application Number:
PCT/JP2014/074372
Publication Date:
April 02, 2015
Filing Date:
September 16, 2014
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
A61B5/0245; A61B5/352; A61B5/308; H03L7/093; H03L7/107
Foreign References:
| JPH10248819A | 1998-09-22 | |||
| JP2007251571A | 2007-09-27 | |||
| US4156855A | 1979-05-29 |
Attorney, Agent or Firm:
UEDA KAZUHIRO (JP)
Kazuhiro Ueda (JP)
Kazuhiro Ueda (JP)
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