1. Two-Port Networks-2 D.C. Kulshreshtha रविवार, 8 दिसम्बर 2019

2. an occasional experience.
Thought of the Day
You have the power
to make happiness
a way of life,
instead of
an occasional experience.
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

3. To be Discussed HYBRID, OR h-PARAMETERS .
Equivalent Circuit Using h-Parameters.
Conditions for Reciprocity and Symmetry.
TRANSMISSION, OR ABCD-PARAMETERS.
Equivalent Circuit.
Examples.
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

4. HYBRID, OR h-PARAMETERS
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

5. 1. Input impedance with output short-circuited
2. Reverse voltage gain with input open-circuited
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

6. 3. Forward current gain with output short-circuited
4. Output admittance with input open-circuited
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

7. Note that the four h-parameters have mixed dimensions .
This is the reason why these parameters are called hybrid parameters.
Using h-parameter equivalent circuit for a transistor proves beneficial in two ways.
Firstly, the measurement of these parameters for a transistor is quite easy.
Secondly, the analysis of the transistor amplifier becomes much simpler.
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

8. Equivalent Circuit Using h-Parameters
It is just the pictorial view of the defining equations.
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

9. Conditions for Reciprocity and Symmetry
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

10. TRANSMISSION, OR ABCD-PARAMETERS
Transmission Matrix
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

11. Reverse voltage gain with receiving end open-circuited,
2. Transfer impedance with
receiving end short-circuited,
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

12. 3. Transfer admittance with receiving end open-circuited,
4. Reverse current gain with receiving end short-circuited,
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

13. Equivalent Circuit
We have defined the sending end variables exclusively in terms of the receiving end variables.
For this reason, it becomes impossible to simultaneously satisfy both the defining equations.
Therefore, no equivalent circuit of the network can be made using the ABCD-parameters.
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

14. Conditions for Reciprocity and Symmetry
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

15. Example 1
Determine the z-parameters for the two-port network, and determine whether the network is (a) reciprocal, and (b) symmetrical.
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

16. Solution
We first determine the parameters z11 and z21, by open-circuiting port 2 and applying a known voltage source of, say, 10 V at port 1.
Thus, V1 = 10 V and I2 = 0.
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

17. रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

18. We solve for Ia1 and Ia3 :
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

19. रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

20. रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

21. We now determine the parameters z12 and z22.
By open-circuiting port 1 and applying a known voltage source of, say, 10 V at port 2.
We get V2 = 10 V and I1 = 0.
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

22. रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

23. रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

24. रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

25. रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

26. Example 2
For the two-port network shown in Fig. 6, determine h-parameters.
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

27. Solution For finding h11 and h21, we short-circuit the output port
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

28. Writing KCL equation for the node a,
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

29. Writing KVL for the input loop, we have
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

30. Writing KCL equation for the node b, we get
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

31. For finding h12 and h22, we open-circuit the input port,
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

32. From the output loop, we have
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2

33. Review HYBRID, OR h-PARAMETERS . TRANSMISSION, OR ABCD-PARAMETERS.
Equivalent Circuit Using h-Parameters.
Conditions for Reciprocity and Symmetry.
TRANSMISSION, OR ABCD-PARAMETERS.
Equivalent Circuit.
Examples.
रविवार, 8 दिसम्बर 2019
Two-Port Networks-2