CHALLENGE OF THE WEEK-2 SOLUTION AND WINNERS

SOLUTION:

Consider the first block as shown with output  as 'x'.

Assuming the drop across each diode is considered to be 0.7. 

Case 1:

 A=0, B=0

Both the diodes conduct and hence the voltage at x=0.7 i.e., equivalent to logic '0'.

Case 2:

A=0, B=1 / A=1, B=0 (logic '1' represents +5V)

Only one diode conducts while other is reverse biased. So the voltage at x=0.7 ≈ logic '0'.

Case 3:

A=1, B=1

Both the diodes are reverse biased and hence they act as open connections resulting in voltage as x=5V ≈ logic '1'.

Hence the first block is found to be behaving as an logical AND gate. Therefore x=A^.B.

Similarly considering x and C to be input to next identical connection whose output is y, we find its operation to be  similar as first block i.e., y=x^.C=A^.B^.C.

The last gate in above diagram is a logical NOT gate, hence provides complimentary output, i.e.,

Hence we infer that, the above logic circuit is a 3-input-NAND gate.  

COTW - 2 RESULTS:

NAME                                   SECTION       POINTS

Aneesha J D'Souza               III Sem A        2                                                         

Anushree Shenoy                  III Sem A        2                                                         

Disha Ramesh Shet              III Sem A        2                                                         

Abhilash                                 III Sem A        1                                                                     

Anjana R                                III Sem A        1                                                                     

Deepa S                                 III Sem A        1         

Akshaya S Palan                   III Sem A        1                                                         

Pooja Poojary                        III Sem B         2

Priyanka Shetty                    III Sem B         2

Kshetha Rainal                     III Sem B         1                                                                     

Mefil D'Souza                       III Sem B         1                                                         

Mohith Prabhu M                 III Sem B         1

Pratheek P B                         III Sem B         1

Pallavi Bhatka S                   III Sem B         1                                                                     

Shwetha                                 III Sem C         2

Sukanya Pai                          III Sem C         2

Suraksha  Shetty                  III Sem C         2

Shreshta                                  III Sem C         1

Congratulation Winners