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by: Kaya Conroy


Kaya Conroy
GPA 3.85


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About this Document

Class Notes
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This 2 page Class Notes was uploaded by Kaya Conroy on Thursday October 22, 2015. The Class Notes belongs to RG ST 137 at University of California Santa Barbara taught by Staff in Fall. Since its upload, it has received 53 views. For similar materials see /class/227185/rg-st-137-university-of-california-santa-barbara in Religious Studies at University of California Santa Barbara.

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Date Created: 10/22/15
ECE137B HighFrequency Ampli er Crib Sheet Page 1 Basics Transistor mall ignal V r 41 Sim li cation of Emitter De eneration gt RE CommonEmitter Stage C models Hybridpi model C R 3 Dre K VJ 1c quotT model Makes commonbase analysis much easier Both these models are only approximate being quotgoodquot up to Additionally R b is o en an important parasitic not discussed much in 137B approximate only check notes for bounds on Validity c C7rJre RE g gmrere RB are Ft C41 C41 f9 Mrs Rare 1gtre RB ls1 vmvgm vavgnM 1 a1 MC C 1 ngLeq MAC CL 32 K333 ch C4 C7 CWCL 1m 7 9 gm ECE137B HighFrequency Ampli er Crib Sheet Page 2 EmitterFollower Stage 0 w B I E vvv C E i gmvbe General Solutions of Problems Nodal anal ls1 V V V V m m gm m a Mimi given that AW Rm r Ruq a1 CWP reRLeq 1117 Am C thransistor input resistance CL Keqlltransistor output resistance a2 Klltransistor input resistance RLeqllre gtltCC c cL ch 1m gm C i Know how to do this 1Write the nodal equations sum of the 2 Use Cramer s rule to solve currents0 at each circuit node and put Yll Y12 Y13 Im the resulting equations in matrix form the 3g Y22 3g 0 Y39s being various combinations of gm39s Y Y Y 0 lR s and sC39s 3 31 33 Yn Yll Y1 YM V1 Vm 1m X1 Y Y 0 V Y21 Yzz Y2 YZA V2 0 Y Y Y Y m Y 22 Y 24 v 0 Q Q2 Q Y Y Y Y Y 4 VW 0 Q Q2 E YEA X1 X2 X3 Y44 3 This comes out as 4 2 Km ksm cu sczs 2L h d sL Which is divided through to get ifpresent m is the number ofzeros minus the number of poles in the transfer function 1 als azs L and the poles and zeroes are found by factoring the numerator and denominator The separatedpole approximation if applicable makes this factoring easy VD m1b1sbas1L s Im I b 5 To nd the impulse response do a artialfraction expansion and then take the inverse LaPlace tmnsform 6 To nd the sinusiodal frequency response set S 1


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