Impedance of R/L/C18-2
Prof. Seewhy Lee
1. 교류회로의 임피던스와 위상차
2. 저항
3. 축전기
4. 인덕터
Agenda
1. 교류회로의 임피던스와
위상차
2. 저항
3. 축전기
4. 인덕터
Impedance & Phase Differ-ence
)sin(0 tV
)sin(0 tILoad
0
0
I
VZ Impedance
Large Impedance Small Current
Impedance of a Resis-tor
)sin(0 tV
R
)sin(0 tR
V
R
VI
)sin()sin( 00 tIt
R
V RZ
1
Ohm’s Law
Impedance of a Capacitor
)sin(0 tV
C
)sin(0 tCVVCq
)sin()cos( 00 tItCV CZ
1
)cos(0 tCVdt
dqI
Impedance of a Capacitor
)sin(0 tV
L
dt
dILtV )sin(0
)sin()cos( 00
tIt
L
V LZ
)cos(0 tL
VI
Capacitor vs. Inductor
CZC
1
Open for DC, Short for Infinte Freq.
LZL
Short for DC, Open for Infinte Freq.
Transduction of Sound & Image through Microphone & CCD
Modulation (Coding)
Oscillation Circuit
Transmission into Space
Receiving by Resonating Circuit
Demodulation (Decoding)
Transduction of Electrical Signal into Sound and Image
Telecommunication (1898-)
Thanks for your attention~!!
Prof. Seewhy Lee