Transcription of Lecture 17: Common Source/Gate/Drain Amplifiers
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Lecture 17: Common Source/Gate/Drain Amplifiers
Department of EECSU niversity of California, BerkeleyEECS 105 Fall 2003, Lecture 17 Lecture 17: Common Source/Gate/Drain AmplifiersProf. NiknejadDepartment of EECSU niversity of California, BerkeleyEECS 105 Fall 2003, Lecture 17 Prof. A. NiknejadLecture Outline MOS Common Source Amp Current Source Active Load Common Gate Amp Common Drain AmpDepartment of EECSU niversity of California, BerkeleyEECS 105 Fall 2003, Lecture 17 Prof. A. NiknejadCommon-Source AmplifierIsolate DC levelDepartment of EECSU niversity of California, BerkeleyEECS 105 Fall 2003, Lecture 17 Prof. A. NiknejadLoad-Line Analysis to find QQDDDoutRDVVIR =110kslope=0V10kDI=5V10kDI=Department of EECSU niversity of California, BerkeleyEECS 105 Fall 2003, Lecture 17 Prof. A. NiknejadSmall-Signal AnalysisinR= Department of EECSU niversity of California, BerkeleyEECS 105 Fall 2003, Lecture 17 Prof. A. NiknejadsvsRinRoutRLRminGvinv+ Two-Port Parameters:Find Rin, Rout, GminR= mmGg=||outoDRrR=Generic Transconductance AmpDepartment of EECSU niversity of California, BerkeleyEECS 105 Fall 2003, Lecture 17 Prof.
Rout ≈roc ||[ro +gmroRS ]=roc ||[ro (1+gmRS)] Department of EECS University of California, Berkeley EECS 105Fall 2003, Lecture 17 Prof. A. Niknejad CG Two-Port Model Function: a current buffer • Low Input Impedance • High Output Impedance.
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