EE2005-Tutorial01-Solution

# EE2005-Tutorial01-Solution - NATIONAL UNIVERSITY of...

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Unformatted text preview: NATIONAL UNIVERSITY of SINGAPORE Department of Electrical and Computer Engineering EE2005 – Electronics Homework 1 Solution Q1. The voltage gain       s o v v is given by o L L v s i i s o r R R a R r r v v + ⋅ ⋅ + =      ------- Eq. 1 where 100 = v a . (a) For r i = 10 R S , r o = 0.1 R L , substitute into Eq.1 L L L s s s s o R R R R R R v v 1 . 100 10 10 + ⋅ ⋅ + =       1 . 1 1 100 11 10 ⋅ ⋅ = 64 . 82 = V/V or 38.34 dB (b) For r i = R S , r o = 0.1 R L , substitute into Eq.1 L L L s s s s o R R R R R R v v 1 . 100 + ⋅ ⋅ + =       1 . 1 1 100 2 1 ⋅ ⋅ = 45 . 45 = V/V or 33.15 dB +- v o +- v i +- 100 v i Voltage Amplifier r o r i v s +- R s i i R L (c) For r i = R S , r o = 10 R L , substitute into Eq.1 L L L s s s s o R R R R R R v v 10 100 + ⋅ ⋅ + =       11 1 100 2 1 ⋅ ⋅ = 55 . 4 = V/V or 13.15 dB Q2. (a) S S ia ia ia v R r r v ⋅ + =--------(1) ia oa ib ib ib v r r r v 10 ⋅ + =--------(2)...
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## This note was uploaded on 10/24/2011 for the course ELECTRICAL ee2021 taught by Professor Tan during the Spring '11 term at National University of Singapore.

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EE2005-Tutorial01-Solution - NATIONAL UNIVERSITY of...

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