EE 330 Lect 34 Fall 2011

EE 330 Lect 34 Fall 2011 - EE 330 Lecture 34 Differential...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
EE 330 Lecture 34 Differential Amplifier Current Source Biasing Current Sources and Mirrors
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
B E C V DD V in R C V out R E V EE B E C V SS V DD V in R E V out B E C V DD V in R C V out V EE A V C E R - R R in R out πE r+ βR C R C R mC gR -1 m g B E C V BB V DD V in R C V out m mE g g +g r+βR -g R π r C R t E CQ V βR I    CQ C t IR V DQ C EB 2I R V DQ EB 2I V CQ t I V CQ E CQ E t I R +V DQ E DQ E EB 2I R 2I R +V t E CQ V I t CQ βV I DQ C EB 2I R V CQ C t V -1 m g DQ EB 2I V CQ t I V MOS BJT MOS MOS MOS BJT BJT BJT CE/CS CC/CD CB/CG CEwRE/CSwRS Basic Amplifier Gain Table Can use these equations only when circuit is EXACTLY like that shown above !! Review from Last Lecture
Background image of page 2
B E C V DD V in R C V out R E V EE B E C V SS V DD V in R E V out B E C V DD V in R C V out V EE B E C V BB V DD V in R C V out CE/CS CC/CD CB/CG CEwRE/ CSwRS Basic Amplifier Characteristics Summary Reasonably accurate but somewhat small gain (resistor ratio) High input impedance Moderate output impedance Used when more accurate gain is required Large noninverting gain Low input impedance Moderate (or high) output impedance Used more as current amplifier or, in conjunction with CD/CS to form two-stage cascode Large noninverting gain Low input impedance Moderate (or high) output impedance Used more as current amplifier or, in conjunction with CD/CS to form two-stage cascode Gain very close to +1 (little less) High input impedance for BJT (high for MOS) Low output impedance Widely used as a buffer Review from Last Lecture
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
High-gain BJT amplifier m V m C 0C -g A -g R gG B E C V DD V in R C V out V EE
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 01/31/2012.

Page1 / 19

EE 330 Lect 34 Fall 2011 - EE 330 Lecture 34 Differential...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online