III. Experimental Procedure

1. Analyze the circuit shown in the following figure;

           

       1. Complete/Fill in the following operation table with reference to the above shown circuit.       

INPUT			OUTPUT				Mathematical operation that can be performed, along with any limitations on input data. (If any)
CLEAR	CLK (Edge)	MODE	OP4	OP3	OP2	OP1

      

b.   Implementation of a general 3-bit shifter

1.  Design general 3-bit shifter that performs the following operations:

• No change in output data.

• Synchronous clear

• Synchronous set

• Shift right

• Shift left

• Parallel load

• Ring counter

• Johnson counter

                                 (This circuit should be designed before arriving in the lab and implemented in the lab for verification)

               HINT:  It is quite similar to the above circuit (in part a) but the input of D-FFs is the output of multiplexer.

                 

                2. The required components includes three 8 × 1 multiplexers and three D- FFs.

          3. Explain how the circuit can be used to implement the following shift registers:

                                i.      SISO

                               ii.      SIPO

                              iii.      PISO

                             iv.      PIPO                                                                   

IV. Other Pre-Lab Exercises

 

1. Study the following circuit and explain its working. What problem it solves? Study the functioning of Schmitt gates.

 

 

                 

Please make sure that you have shown the result of your implementation to the lab instructor (or TA) and obtained his/her signature. The two partner's in each group must obtain the signatures and attach with the lab/experiment report.