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CS302 VU Assignment No. 3 Spring 2012 Solution

Question No: 1

For the positive Edge- Triggered J-K flip flop with preset and clear inputs as shown in figure (a) below. Determine the Q outputs for the inputs shown in timing diagram (b) if Q is initially low.

Solution:

According to the  J and K flip flop:

 

CLK

J

K

Qt+1

0

x

x

Qt

1

x

x

Qt

0

0

Qt

           ↑

0

1

0

1

0

1

1

1

Qt

 

 

 

 

According to the PRE and CLR:

 

PRE(input) CLR(input) Output
0 0 Invalid
0 1 1
1 0 0
1 1 Qt

 

Timing Diagram

Solution:


Counting numbers is one of the applications of flip-flops. Determine the output waveforms in relation to QA, QB and QC in the counter circuit given in figure below. Also show the binary sequence represented by these waveforms.

Solution:

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  • Usmanspecial

    IS this correct……………?