1. Two-Port Networks-1 D.C. Kulshreshtha मंगलवार, 23 जनवरी 2018

2. HAPPINESS is found in DOING;
Thought of the Day
HAPPINESS is found in DOING;
Not merely
in POSSESING.
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

3. To be Discussed Multi-Port Networks. Two-Port Network.
Six Possibilities of Characterization.
open-circuit, impedance, or z-paramters.
Equivalent Circuit Using z-parameters .
Conditions for Reciprocity and Symmetry.
Short-circuit, admittance, or y-paramters.
Equivalent Circuit Using y-Parameters.
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

4. Port
A port of a network consists of two terminals — one for the entry of current and other for its exit.
The currents in the two terminals of a port are equal.
‘Porte’ in French means ‘door’.
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

5. Two-Port Network
The port variables are port currents I1 and I2 and the port voltages V1 and V2.
Note the reference directions of currents and voltages.
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

6. Assume linear time-invariant elements.
May contain dependent sources but not independent sources.
We need two linear equations in port-variables to characterize such a two-port network.
Two can be taken as the independent variables and the remaining two as the dependent variables.
The choice is just a matter of convenience for a given applications.
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

7. Six Possibilities Open-circuit, impedance, or z-parameters.
Short-circuit, admittance, or y-parameters.
Hybrid, or h-parameters.
Inverse hybrid, or g-parameters.
Transmission, or ABCD-parameters.
Inverse transmission, or abcd-parameters
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

8. मंगलवार, 23 जनवरी 2018
Two-Port Network-1

9. OPEN-CIRCUIT, IMPEDANCE, OR z-PARAMTERS
Impedance Matrix
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

10. 1. Input driving point impedance,
2. Reverse transfer impedance,
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

11. 3. Forward transfer impedance,
4. Output driving point impedance,
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

12. Equivalent Circuit Using z-parameters
It is just a picturization of the defining equations.
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

13. Alternate way of drawing the equivalent circuit.
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

14. Conditions for Reciprocity
A network is said to be reciprocal, if
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

15. Condition for Symmetry
A two-port network is said to be symmetrical if its ports can be interchanged without changing the port voltages and currents.
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

16. SHORT-CIRCUIT, ADMITTANCE, OR y-PARAMTERS
Admittance Matrix
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

17. 1. Input driving point admittance,
2. Reverse transfer admittance ,
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

18. 3. Forward transfer admittance
4. Output driving point admittance
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

19. Equivalent Circuit Using y-Parameters
Picturizing the defining equations,
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

20. Alternatively,
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

21. Conditions for Reciprocity and Symmetry
मंगलवार, 23 जनवरी 2018
Two-Port Network-1

22. Review Multi-Port Networks. Two-Port Network.
Six Possibilities of Characterization.
open-circuit, impedance, or z-paramters.
Equivalent Circuit Using z-parameters .
Conditions for Reciprocity and Symmetry.
Short-circuit, admittance, or y-paramters.
Equivalent Circuit Using y-Parameters.
मंगलवार, 23 जनवरी 2018
Two-Port Network-1