Apparatus and method for processing signal

Patent metadata

Field	Value
Publication number	US-9762227-B2
Application number	US-201514614072-A
Country	US
Kind code	B2
Filing date	Feb 4, 2015
Priority date	Jul 28, 2014
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

An apparatus of processing a signal or a biosignal, and a method of processing a signal or a biosignal are provided. The method of processing signal involves receiving a first reference signal having a frequency component of a measurement signal to be applied to a subject, receiving a second reference signal having a frequency component within a frequency bandwidth of an amplifier, and converting a first signal measured from the subject to a second signal within the frequency bandwidth of the amplifier, based on the first reference signal and the second reference signal.

First claim

What is claimed is:

1. A method of processing signal, the method comprising:
receiving a first reference signal having a frequency component of a measurement signal to be applied to a subject;
receiving a second reference signal having a frequency component within a frequency bandwidth of an amplifier; and
converting a first signal measured from the subject to a second signal within the frequency bandwidth of the amplifier, based on the first reference signal and the second reference signal,
wherein the converting comprises:
generating a first control signal by combining the first reference signal and the second reference signal; and
converting the first signal to the second signal based on the first control signal.

2. The method of claim 1 , wherein the generating comprises generating the first control signal by performing an XNOR logic operation on the first reference signal and the second reference signal.

3. The method of claim 1 , wherein the first control signal has a first time width and a second time width in which a signal amplitude is greater than an upper threshold value, and has a third time width and a fourth time width in which the signal amplitude is less than a lower threshold value.

4. The method of claim 3 , wherein the first time width is equal to the fourth time width, and
the second time width is equal to the third time width.

5. The method of claim 1 , the method further comprising:
generating a third signal by amplifying the second signal using the amplifier; and
converting the third signal to a fourth signal of a baseband.

6. The method of claim 5 , wherein the converting of the third signal to the fourth signal comprises:
converting the third signal to the fourth signal based on a second control signal having a frequency component equal to the frequency component of the second reference signal.

7. The method of claim 5 , wherein the converting of the third signal to the fourth signal comprises:
converting the third signal to the fourth signal based on a second control signal acquired by phase-shifting the second reference signal by 90 degrees.

8. The method of claim 1 , wherein the first signal has a frequency component outside the range of the frequency bandwidth of the amplifier, and
the second signal has an intermediate frequency component within a frequency bandwidth range of the amplifier.

9. A method of processing signal, the method comprising:
selecting a single first reference signal from among a plurality of first reference signals based on a measurement mode;
generating a first control signal based on the selected first reference signal and a second reference signal having a frequency component within a frequency bandwidth of an amplifier; and
converting a first signal measured from a subject to a second signal within the frequency bandwidth of the amplifier, based on the first control signal.

10. The method of claim 9 , wherein the selecting comprises selecting a first reference signal having a frequency component of a measurement signal to be applied to the subject in a first measurement mode, and selecting a first reference signal having a fixed signal level over time in a second measurement mode.

11. The method of claim 10 , wherein the first measurement mode is a mode for measuring bio-impedance information, and the second measurement mode is a mode for measuring biopotential information.

12. The method of claim 9 , wherein the generating comprises generating the first signal by performing an XNOR logic operation on the first reference signal and the second reference signal.

13. The method of claim 9 , wherein the first control signal has a first time width and a second time width in which a signal amplitude is greater than an upper threshold value, and has a third time width and a fourth time width in which the signal amplitude is less than a lower threshold value.

14. The method of claim 9 , the method further comprising:
generating a third signal by amplifying the second signal using the amplifier; and
converting the third signal to a fourth signal of a baseband.

15. A signal processing apparatus comprising:
a controller configured to generate a first control signal based on a first reference signal having a frequency component of a measurement signal and a second reference signal having a predetermined frequency component within a frequency bandwidth of an amplifier;
a first converter configured to convert a first signal to a second signal having a frequency component within the frequency bandwidth of the amplifier, based on the first control signal;
the amplifier configured to output a third signal by amplifying the second signal; and
a second converter configured to convert the third signal to a fourth signal of a baseband,
wherein the controller is configured to generate the first control signal by performing an XNOR logic operation on the first reference signal and the second reference signal.

16. A signal processing apparatus comprising:
a controller configured to generate a first control signal based on a first reference signal having a frequency component of a measurement signal and a second reference signal having a predetermined frequency component within a frequency bandwidth of an amplifier;
a first converter configured to convert a first signal to a second signal having a frequency component within the frequency bandwidth of the amplifier, based on the first control signal;
the amplifier configured to output a third signal by amplifying the second signal; and
a second converter configured to convert the third signal to a fourth signal of a baseband wherein the first control signal has a first time width and a second time width in which a signal amplitude is greater than an upper threshold value, and has a third time width and a fourth time width in which the signal amplitude is less than a lower threshold value.

17. The apparatus of claim 15 , wherein the second converter is configured to convert the third signal to the fourth signal based on a second control signal having a frequency component equal to the frequency component of the second reference signal.

18. A signal processing apparatus comprising:
a controller configured to generate a first control signal based on first reference signal having a frequency component of a measurement signal and a second reference signal having a predetermined frequency component with a frequency bandwidth of amplifier;
the amplifier configured to output a third signal by simplifying the second signal; and
a second converter configured to convert the third signal to a fourth signal of a baseband, wherein the second converter is configured to convert the third signal to the fourth signal based on a second control signal acquired by phase-shifting the second reference signal by 90 degrees.

19. The apparatus of claim 15 , wherein the signal processing apparatus is comprised in and operates within a wearable device.

20. A biosignal processing apparatus comprising:
a first converter configured to convert a frequency component of a biosignal outside a frequency bandwidth of an amplifier to a frequency component within the frequency bandwidth of the amplifier;
the amplifier configured to amplify the biosignal having the frequency component converted; and
a controller configured to generate a first control signal based on a first reference signal having a frequency component of a measurement signal and a second reference signal having a predetermined frequency component comprised in the fre

Assignees

• Samsung Electronics Co Ltd
• The Ind & Acad Coop In Chungnam Nat Univ (Iac)

Inventors

• Kim Jong Pal
• Ko Hyoung Ho
• Lee Tak Hyung

Classifications

• H03F3/00

  Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements · CPC title

• A61B5/7228

  Signal modulation applied to the input signal sent to patient or subject; Demodulation to recover the physiological signal · CPC title

• A61B5/7225

  Details of analogue processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation (input circuits for detecting, measuring, or recording bioelectric or biomagnetic signals A61B5/30; specific diagnostic methods using bioelectric or biomagnetic signals A61B5/316) · CPC title

• A61B5/0531

  Measuring skin impedance · CPC title

• H03F3/45475

  using IC blocks as the active amplifying circuit · CPC title