ELECTRO WARRIORS
Gordon Moore said:
"The number of transistors that can be inexpensively placed on an IC will increase exponentially,doubling 
 every eighteen months"(Electronics Magazine ,1965)
"In size we are approaching the size of atoms which is a fundamental barrier"(2005)
"There are fundamental limits to Moore's law and the laws of physics will render it obsolete in about ten or fifteen
 years time"(2007)
Electronics has changed the way we live. It grows in stature everytime it shrinks in size, as they say. But it has never really shrunk, as far as the All-seeing eye can look into the intricacies and appreciate the ingenuities. To get a feel of this microscopic field, it is essential that the circuit designers be strong in their basics and make use of every opportunity, that comes their way, to learn.

We invite you to switch on your brain circuits and step into the world of electronics and test your skills against the best of minds.

Are you ready to join the army of Electrowarriors ?





Format
  • This is a circuit design and debug event.
  • Two members per team.
  • The event consists of a written prelims followed by finals.
  • Six teams will qualify for the finals.
  • The finals will involve hands on implementation of circuits.
  • We have posted a set of sample questions on the website. Try cracking those questions which will definitely help you to learn more.

        In case you want to know how close you were to the answers, mail us to the ID given in the 'Contact us' tab 

1.To begin with Digital circuit Design

 Implement the function using  2-level NOR  gate circuit:

 f =  wx’ + y’z’ + w’yz’

Hint : find SOP for f’ and proceed.

 

2. This question is a very interesting one.It requires some time to think over though.It may seem trivial at the first glance.Why is it that in analysis we always take the drop across the base-emitter(diode) junction to be 0.7V always,but there is no such fixed value in the gate-source voltage of a MOS.

 

3.Implement a full subtractor(FS) using 2 half subtractors.The FS takes in a 3-bit input.The two outputs are (as you know)difference and borrow.

 

4.Try to crack this question of two contrasting statements which we perhaps mostly wouldn’t have given a thought about.If there is a pole at some frequency,the transfer function “ blows up”(is infinity).Yet, we see that the value of |H(s)| at that frequency is 3-dB less(some finite value) than the DC-gain (say for LPF).Perhaps we are familiar with both these statements but only one can be true.Can u provide an explanation for this?

 

5.In negative feedback system,the closed loop gain(Af) is A/( 1+Aβ ).If the loop gain Aβ is large,then it follows that Af ≈1/ β.Similarly in the case of a positive fb where Af=A/(1-Aβ) we can approximate it to  Af ≈ -1/ β(if the loop gain is large).But we know that a positive feedback system is unstable(infinite gain) if loop gain is large.Where is the flaw in the argument.

  

 

     Contact:

     Henry Irudayaraj      +91 - 9840395349

     Mail to :  electrowarriors[at]kurukshetra[dot]org[dot]in

    Or post your queries @ Kurukshetra forum