BIOLOGICAL INFORMATION MEASUREMENT DEVICE

摘要

The biological information measurement device (1) is provided with: a phase- and frequency-comparing part (21) for outputting a deviation signal corresponding to the phase difference between a biological signal and an oscillation signal; a loop filter (22); a voltage controlled oscillator (23) for generating/outputting an oscillation signal according to the deviation signal passing through the loop filter (22); a biological signal analysis section (30) having a SN analysis part (31) for estimating the SN ratio of the biological signal and a PF analysis part (32) for analyzing the phase difference/frequency difference between the biological signal and the oscillation signal; a variable low pass filter (60) for selectively blocking the signal in a specified frequency band contained in the deviation signal that has passed through the loop filter (22); and a parameter control section (40) for modifying the cutoff frequency of the variable low pass filter (60) on the basis of the SN ratio and the phase difference/frequency difference.