Dept. of Biomedical Engineering YOUNHO HONG

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Presentation transcript:

Dept. of Biomedical Engineering 2003200449 YOUNHO HONG Sensors(1) Dept. of Biomedical Engineering 2003200449 YOUNHO HONG

Phase-sensitive Demodulation (problem 8.) Given the sinusoid plot x(t)c(t) from t=0 to t=0.3. time scale is 0.02.

Phase-sensitive Demodulation Given x(t)c(t)=y(t), find x(t) LPF y(t) O(t)=? Filtered by Low Pass

Phase-sensitive Demodulation Given the sinusoid plot x(t)c(t).

Capacitive Sensor (problem 9.) (a)Find Cx(t) using x(t) and maximum,minimum Cx(t). chest

Capacitive Sensor (b) Find Vo(t).

Capacitive Sensor (c) Phase-sensitive demodulation LPF Vo(t) Vi(t)

Capacitive Sensor (problem 10.) A B C D

Capacitive Sensor Find Vi using x0,a,(P1-P2) and Vs. constant constant

Capacitive Sensor (b) Find Gain of IA with 0.1[V/mmHg] sensitivity, when Vs=1[v],Xo=100[um],a=2[um/mmHg]. (c) Phase-sensitive demodulation In order to make 0.1 sensitivity, Gain should be 10. + LPF Vo(t)

Thank you.