1. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 1Park Jun-hwan Medical Instrumentation #10 제출일 : 2014. 06. 03. 생체의공학과 2010103789 박 준 환 Electro-magnetic Spectrum, Modulation&Demodulation

2. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 2Park Jun-hwan 1. Electro-magnetic Spectrum 1) Audio Frequency 2) Radio Frequency (1) Low Freq : 30kHz(10km) ~ 300kHz(1km) (2) Medium Freq : 300kHz(1km) ~ 3MHz(100m) (3) High Freq : 3MHz(100m) ~ 30MHz(10m) (4) Very High Freq : 30MHz(10m) ~ 300MHz(1m) [VHF] (5) Ultra High Freq : 300MHz(1m) ~ 1GHz(0.1m) [UHF] * (3), (4) : Radio 에 사용 * (4), (5) : TV 에 사용

3. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 3Park Jun-hwan 1. Electro-magnetic Spectrum 3) Microwave(1GHz 이상 ) 4) Infrared( 적외선 )

4. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 4Park Jun-hwan 1. Electro-magnetic Spectrum 5) Visible Light 6) UltraViolet 7) X-ray 8) Gamma ray

5. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 5Park Jun-hwan 2. Modulation & Demodulation 1) Baseband Signal 예 ) 음성 : 20 ~ 20,000Hz, ECG : 0.5 ~ 100Hz, EEG : 0.1 ~ 30Hz * 3 개의 음성 signal X Amp

6. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 6Park Jun-hwan 2. Modulation & Demodulation 2) Fourier transform Modulation 20kHz Amplitude Modulation(AM)

7. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 7Park Jun-hwan 2. Modulation & Demodulation 3) Frequency Division Multiplexing(FDM) X Amp LPF

8. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 8Park Jun-hwan 2. Modulation & Demodulation 3) Frequency Division Multiplexing(FDM) * : 내가 고를 주파수 Filtering : 진폭이 절반인 고를 주파수만 남아 있음 Frequency Division Multiplexing(FDM)

9. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 9Park Jun-hwan 2. Modulation & Demodulation 4) Time Division Multiplexing(TDM) : Digital 에서 가능 Switch.. 0 1 1 0 0 1 1 0 Digital 무선통신 기술

10. Dept. of Biomed. Eng.BME302: Medical InstrumentationKyung Hee Univ. 10Park Jun-hwan 감사합니다.