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

2. 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.

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

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

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

6. Capacitive Sensor
(b) Find Vo(t).

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

8. Capacitive Sensor
(problem 10.) A B C D

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

10. 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)

11. Thank you.