1. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 1 최법경 Biomedical Instrumentation Report 11 2010103819 최법경

2. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 2 최법경 Contents Bio impedance Phase sensitive demodulation Design for electrical safety

3. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 3 최법경 Bio impedance 생체 신호의 측정 Z +V-+V- i +-+-

4. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 4 최법경 Phase sensitive demodulation

5. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 5 최법경 Phase sensitive demodulation

6. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 6 최법경 Phase sensitive demodulation 실수정보 inphase 허수정보 quadrature

7. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 7 최법경 Design for electrical safety 안전 하지 않은 예 H N G DC power supply ADuPDisplay

8. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 8 최법경 Design for electrical safety Ex1 ADuP 불이 켜지면 1 꺼지면 0 디지털 신호로 표현가능 따라서 빛에 의해 isolation 된 신호를 earth-ground 쪽으로 넘길 수 있다. Isolation barrier Isolation, floatingEarth-grounded

9. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 9 최법경 Design for electrical safety

10. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 10 최법경 Design for electrical safety Digital signal 아날로그 회로 보다 디지털 신호가 왜곡과 잡음에 강하다는 장점이 있어 이렇게 디지털 통신으로 신호를 전달하면 잡음이 줄일 수 있다. Power Display Battery Isolation barrier