Chapter 6 Building Block of IntegratedCircuit Amplifier FET
Chapter 6. Building Block of Integrated-Circuit Amplifier
FET와 BJT (b)
IC Biasing-Current Sources
Current Steering Circuits Current Source Current Sink
6. 2. Basic Gain Cell(Active Load) Ideal 일 경우
• FET, Common Gate Amplifier
6. 8 MOS Cascode Amplifier CG amplifier stage Characteristics ① consists of CS, CG amplifier stage ② CS amplifier stage - high input resistance - large transconductance CS amplifier stage ③ CG amplifier stage - superior high-frequency response. Figure 6. 36 (a) The MOS cascode amplifier. 15
Current Mirrors with Better Performance Cascode Current Mirror Q 1, Q 4는 diode connected Tr로서 constant voltage 제공, Q 2 , Q 3는 Cascode 회로 형성 매우 큰 출력 저항 ro 2를 약점: Q 2, Q 3 동작시키는데, 상대적으로 큰 전압 필요 배로 증가시킴. Vo의 전압이 최소 2 Vgs 필 요.
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