1. Dept. of Biomedical Engineering 2003200449 YOUNHO HONG

2. (1)Self inductance (2)Mutual inductance F x Vo Vs + Vo - Magnetic core

3. (3) Differential inductance (a) when core is at x=0 X=0 +D -D δ -δ-δ a b c d e f VcdVfe Vo

4. (b) When core is at x=+ δ (c) When core is at x=- δ Vcd Vfe Vo Vcd Vfe Vo

5. (problem 13.) (a) Skretch output signal of LVDT from 0ms to 10ms.

6. (b) Write the methods of finding y(t). Method 1 : Full wave Rectifier + LPF Method 2 : phase-sensitive demodulation V(t) Vo(t) FWR +LPF Vo(t)

7. (ploblem 14.) (a) θ=0. (b) θ=10. +LPF Vo(t)

8. (c) θ=45. (d) θ=90. To get rid of this effect, We need to multifly.

9. Piezoelectric cristal x q = kx chargedeflection Piezoelectric sensor has no dc response. (1) Vo(t) Vs(t) X(t)

10. (2) Vo(t) f |H| Fc=1/2 πRC k/c If you plan to use the piezoelectric sensor, for measuring pulse, The lowest freq of pulse signal is assumed to be 0.1Hz.