Update : 15-07-2017

Dear Students,

Today's word : Perseverance
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Perseverance is failing 19 times and succeeding 20th time. 
-Julie Andrews
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Perseverance is the hard work you do after you get tired of doing the hard work you already did.  
-Newt Gingrich
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Due to a meeting , I had to leave you in the lab with matlab. I hope you all are now somewhat familiar with the environment.

In today's class I tried to explain the following points :

1. A network contains various electronic devices such as RLC and any of the many semiconductor devices.

2. Network analysis is the exercise where "for a given network" and an "input" we must be able to tell what the output will be. That is, if H is the system and x, y are input and output. We must find y given x and H.

3. For a system to be useful it must be Linear and Time invariant (LTI).

4. A system is linear when it obeys the principle of homogeneity and scaling.

5. Systems that have only R,L,C components plus dependent and independent voltage or current sources are always linear.

6. However we cannot build useful systems with only R,L and C. We must use semiconductor devices like BJT, FET, SCR, Diode etc.

7. Semiconductor devices are inherently NON-LINEAR.

8. When semiconductors are used in a network , we must use the model (such as h-parameter model).

9. Model is an abstract representation of a complex device and will be linear.

10. By converting a complex , non-linear system into a simpler linear system , we can apply network theorems (which are valid only for linear systems) to find the output for a given input.

More about it in the next lecture....

During the weekend, please revise your grasp on C-language and also collect  a summary on Matrix algebra.

We will begin our exercises next week.

HaPpY Weekend
HoD-ECE-SVIT