公开(公告)号：US11481470B2

公开(公告)日：2022-10-25

申请号：US16897774

申请日：2020-06-10

Applicant: Electronics and Telecommunications Research Institute

Inventor： Youngseok Baek ,  Ik Soo Eo ,  Bon Tae Koo

IPC: G06F17/14

Abstract: Provided is a fast Fourier transform device for analyzing specific frequency components of an input signal. The fast Fourier transform device includes an address generator that generates an address, based on a first frequency index corresponding to a first frequency, an FFT coefficient table that outputs a first Fourier transform coefficient corresponding to the generated address among Fourier transform coefficients of the first frequency index, and an operator that calculates a frequency characteristic of an input signal associated with the first frequency, based on the input signal and the first Fourier transform coefficient.

公开(公告)号：US11517216B2

公开(公告)日：2022-12-06

申请号：US16248582

申请日：2019-01-15

Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE

Inventor： Min-Hyung Cho ,  Young-deuk Jeon ,  Bon Tae Koo ,  Mun Yang Park ,  Youngseok Baek

IPC: A61B5/0537 ,  G01N27/02 ,  A61B5/00 ,  G01N33/483

Abstract: The inventive concept relates to a body composition analysis system. A body composition analysis system according to an embodiment of the inventive concept includes a sinusoidal signal generator, a synchronous detector, and a bioimpedance analyzer. The sinusoidal signal generator converts a digital sinusoidal signal having a target frequency into an analog sinusoidal signal. The synchronous detector extracts a target frequency component of a bioelectrical signal generated in response to an analog sinusoidal signal based on the digital sinusoidal signal. The bioimpedance analyzer calculates the bioimpedance based on the target frequency component of the bioelectrical signal. According to the inventive concept, it is possible to improve the selectivity for extracting the target frequency component of the bioelectrical signal and to reduce the area and variations of characteristics for the implementation of the integrated circuit.