L13 Part 1 TwoStageAmp_1

L13 Part 1 TwoStageAmp_1 - EE 311 & EEO 311 Lect. 13 6.11...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
EE 311 & EEO 311 Lect. 13 6.11 Useful Transistor Pairings: Two - Stage Amplifier EE 353 Exp. 4 Zubair Rehman
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 Direct Coupled CE - CC V CC = 18 V Reference Sedra - Smith 5.5 Biasing in BJT Amplifier Circuit For Q1 Transform V CC B B DC Bias Circuit For Q1 1 1 11 || 12 12 11 12 * 1 1 1 1 1 1 1 1 + = + = + + = = + = 1 FE E E B E E BE B B B B CC B h I I I I R V I R V R R R R R R V V β
Background image of page 2
From 2N3904 Data Sheet At I C = 10 mA V BE = 0.72 V h FE = I C / I B β At I C = 10 mA: min h FE = 100 max h FE = 300 Keep R B * [I E1 / ( β+129] < 0.2 * R E1 I E1 e.q. R B * [I E1 / ( β+129] = 1 V R B = ( β+129 * (1 V / I E1 ) maxR B = [(h FE,min + 1) * 1 V] / I E1 = (101*1 V) / 10 mA ≈ 10 k Why use minimum value of h FE ? V B = 1 V + 0.72 V + 6 V = 7.72 V 1 1 1 E E BE E B B I R V I R V + + 1 + = β Divide V CC equally across R C1 , V CE E1 I C1 R C1 = V CE1 = I E1 R E = V CC
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 09/28/2011.

Page1 / 10

L13 Part 1 TwoStageAmp_1 - EE 311 & EEO 311 Lect. 13 6.11...

This preview shows document pages 1 - 4. Sign up to view the full document.

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