전자 회로 1 Lecture 8 (MOSFET-III)

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전자 회로 1 Lecture 8 (MOSFET-III) 2009. 05. 임한조 아주대학교 전자공학부 hanjolim@ajou.ac.kr 이 강의 노트는 전자공학부 곽노준 교수께서 08.03에 작성한 것으로 노트제공에 감사드림.

Single-stage MOS Amplifier - Biasing May, 2008 Nojun Kwak

The Common-Source (CS) Amp. May, 2008 Nojun Kwak

May, 2008 Nojun Kwak

The CS with a Source Resistance Source쪽에 저항이 있으면 T-model이 편함 May, 2008 Nojun Kwak

May, 2008 Nojun Kwak

The Common-Gate (CG) Amp. May, 2008 Nojun Kwak

Unity current gain (current follower) 좋은 주파수 특성 - Non-inverting Low input resistance Unity current gain (current follower) 좋은 주파수 특성 (high freq. response가 좋음) May, 2008 Nojun Kwak

The Common-Drain (Source Follower) May, 2008 Nojun Kwak

- Non-inverting high input resistance Low output resistance Unity voltage gain (voltage follower) May, 2008 Nojun Kwak

Summary: Single-stage MOS AMP. May, 2008 Nojun Kwak

May, 2008 Nojun Kwak

Internal Capacitance (MOSFET) May, 2008 Nojun Kwak

MOS Gate Capacitance May, 2008 Nojun Kwak

MOS Junction Capacitance Internal capacitance 크기: fF (10-15 F) to pF (10-12 F) (see Ex. 4.36) Cf.) Coupling cap. ~ 10-6 F May, 2008 Nojun Kwak

MOSFET High Frequency Model May, 2008 Nojun Kwak

MOS Internal Capacitances (high freq model) May, 2008 Nojun Kwak

High Freq. Small Signal Model May, 2008 Nojun Kwak

MOSFET Unity Gain Freq. (fT) * fT ~= 100MHz (old tech.) / several GHz (new tech.) May, 2008 Nojun Kwak

The CMOS Digital Logic Inverter May, 2008 Nojun Kwak

The depletion type MOSFET Inversion layer를 미리 만들어 놓음. NMOS인 경우: Gate 밑에 n형으로 살짝 doping Vt < 0: channel이 없어지는 voltage VGS = 0일 때도 VDS > 0이면 전류가 흐름 May, 2008 Nojun Kwak

전류-전압 특성 (depletion type MOS) May, 2008 Nojun Kwak

비교 (Depletion vs. Enhancement) May, 2008 Nojun Kwak