Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

http://www.ejwoo.com

5 장 , 6 장 강의노트

2013103830 임혜경 (2.4)2013103792 김유림 (2.4)2013103811 안수민 (2.4)2013103809 설다빈 (2.8)

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Frequency Response and System

ZL

+ V

L -

ZL

+ V

L -

R, L, C compo-nentsAnd

Sources.

ZT

+VT_

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Fourier analysis

• Fourier series : periodic function• Fourier transform : aperiodic

• x(t) = x( t + nT ), n = 1, 2, 3 …• T : period, 1/T : f (fundamental fre-

quency)• w=2πf : fundamental angular fre-

quency• nf : harmonics ( 고조파 )

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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R, L, C 를 포함하는 선형회로에 주기함수 x(t) 가 입력일때 출력은 ?

• C0 가 DC 입력 ▷ y0 는 DC 회로 해석• C0 가 정현파 ▷ y0 는 phasor 해석

x(t)

y(t)

R, L, C선형회로

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Low Pass Filter

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Low Pass FilterEx.

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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High Pass Filter

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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High Pass FilterEx.

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Band Pass Filter

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Band Stop Filter

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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RC 와 RL 회로

→First-order linear differential equa-tion

with constant coefficients

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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RC 와 RL 회로

→First-order linear differential equa-tion

with constant coefficients

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Zero input Response

→ Input

,C → Circuit Parame-ters→ state variable

→ initial condition

→Zero input response 는 Vt(t)=0 일때의 v(t)이다 .

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Zero input Response

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Zero input Response

증명 :

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Examplet=0 R1

R2 C+V(t)-

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

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Example(1) t < 0

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

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Example(2) t > 0

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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#Step response

1) t<0, v(t)=02) t>=0,

a. Homogeneous sol.b. Particular sol.

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

http://www.ejwoo.com 학생 작성 강의록

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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RC circuit sinusoidal re-sponse

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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RC circuit sinusoidal response

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Series RLC circuit

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Series RLC circuit

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Series RLC circuit

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Zero-in-put re-sponse

Series RLC circuit

Dept. of Biomed. Eng BME227: Basic Electronic Cir-cuit

Kyung Hee Univ.

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Step re-sponse

Series RLC circuit