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Unformatted text preview: 1 ECSE 210: Circuit Analysis ECSE 210: Circuit Analysis Lecture#32: TwoPort Networks Moday, Apr 4, 2005 TwoPort Transmission Paramters Commonly referred to as the ABCDparameters . + Linear Network 1 V + 2 V 1 I 2 I Note the voltage polarities, and current directions. Using the principle of superposition we get: 2 2 1 I V V B A = 2 2 1 I V I D C = ABCD Paramters A, B, C and D are complex constants of proportionality with units of Ohms ( ), Siemens (S), or unitless. Common in Transmissionline models Two equations describe twoport operation. Once A, B, C and D are known, the input/output operation of the twoport network is completely defined. The transmission parameter matrix is: = 2 2 1 1 I V I V D C B A = = D C B A t t t t T 22 21 12 11 2 2 1 I V V B A = 2 2 1 I V I D C = ABCD  Paramters 2 1 I V B = 2 = V 2 1 2 = = V I V B 2 1 V V A = 2 = I 2 1 1 = = I V V A 2 1 I I D = 2 = V 2 1 2 = = V I I D 2 1 V I C = 2 = I 2 1 1 = = I V I C = 2 2 1 1 I V I V D C B A 2 2 1 I V V B A = 2 2 1 I V I D C = Equivalent Circuits + + 11 z 22 z...
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 Spring '10
 ANASHAMOUI

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