Ch10 Two-Port Networks 1s09

# Ch10 Two-Port Networks 1s09 - Two Two – Port Networks...

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Unformatted text preview: Two Two – Port Networks Port Networks Chapter 10 EEE 33 EEE 33 1 st st Semester 2005 Semester 2005-2006 2006 Department of Electrical and Electronics Engineering University of the Philippines - Diliman Department of Electrical and Electronics Engineering - 2 Definition of Two-Port Networks Two-port network + V 1 _ + V 2 _ I 1 I 2 Port 1 Port 2 s In general, we describe a two-port network as a network consisting of R, L, and C elements, op- amps, transformers, and dependent sources, but no independent sources. s Only two of the four variables are independent, and the specification of any two of them determines the remaining two. Department of Electrical and Electronics Engineering - 3 Examples of Two-Port Networks L - network Series Shunt Pi network Department of Electrical and Electronics Engineering - 4 Examples of Two-Port Networks T network Bridged T Lattice Twin T Department of Electrical and Electronics Engineering - 5 Two-Port Network Parameters r Permits us to describe its operation when it is connected to a larger network. r Important in modeling electronic devices and system components. Two-port network + V 1 _ + V 2 _ I 1 I 2 Port 1 Port 2 Parameters of the two-port completely describe its behavior in terms of the voltage and current at each port. Department of Electrical and Electronics Engineering - 6 Two-Port Parameters r Admittance Parameters (y jk ) r Impedance Parameters (z jk ) r Hybrid Parameters (h jk ) r Transmission Parameters (t jk ) Department of Electrical and Electronics Engineering - 7 Admittance Parameters • V 1 and V 2 are the independent variables • Express I 1 and I 2 in terms of V 1 and V 2 I 1 = y 11 V 1 + y 12 V 2 I 2 = y 21 V 1 + y 22 V 2 • The coefficients y jk are also called the short-circuit admittance parameters or the y-parameters • The coefficients y jk are dimensionally admittance Department of Electrical and Electronics Engineering - 8...
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Ch10 Two-Port Networks 1s09 - Two Two – Port Networks...

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