CMOS基本放大器设计°òMOSFET¤j1. 2. 3.°q]-pP¤R °òMOSFET¤j IC MOSFET¤j8-22¤¤z ]¤Z °q]-pP¤RDiscrete MOSFET amplifiers°]-p1. 2. 3.]° IG=0A qe ]-pC IDM VGSA¤p¤]-pCRGq±`¤jb Mδ ≥∫Χβ ICs{í AG°]-p bIC]-p¤¤¤¤¨C8-23¤¤z ]¤Z IC MOSFET amplifiers°]-p ICq°]-p¤@¨°ò-ìhG 1. 2. ¤qAhqéAC§Y active loadC ¨qyCqy¤@¨G¤@Oe-±¨ìLF¤óA±N GSuFt¤@ O¨qyè (current mirror)C °òMOSqyè 1I REFIREF¨Mw VGS C1 W ′ (VGS Vt ) 2 = kn 2 L 13IO =VGS¨Mw IOC1 W ′ (VGS Vt )2 kn 2 L 22 VGS A -Y¤]b P°òOPs§@A Vt¤] PA k’¤]PAפ]PC Q1M Q2PIO I REF=(W / L)2 (W / L)1ο∞ι∞Η±±±ο∩ΤΧ8-24¤¤z ]¤Z qyèéXSIO IREFSlope=1/roFor Q1 and Q2 are matched.VGS -VtíVGSVOVO ≥VGS -Vt¤§q¤p°TIORoRo =VO V = ro 2 = A IO I ORo8-25¤¤z ]¤Z qyè]-pI D1 = I D1 =1 W ′ (VGS Vt ) 2 kn 2 L 1 VDD VGS R ID……
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