Conversion of D flip flop
In the last article we have discussed about “how to convert JK flip flop into SR, D and T type of flip flop”. Today we are going to convert D flip flop. We can convert D flip flop into SR and JK flip flop by using suitable combinational circuit. Combinational circuits for this purpose can be designed easily by using conversion tables and K-Maps. Let us see how to convert D flip flop into different types of flip flop.
1) Conversion of D flip flop into SR flip flop:
For converting D flip flop to SR flip flop, we use S and R as external inputs and D is the actual input to the flip flop. S, R and Qn makes eight possible combinations, but S=R=1 is an invalid combination. So, the corresponding entries for Qn+1 and D are don’t cares. Then we have to express D in terms of S, R and Qn for the design of required flip flop.
The conversion table, K-Maps and logic diagram for the conversion of D flip flop into SR flip flop is shown below:
2) Conversion of D flip flop into JK flip flop:
In case of conversion of D flip flop to JK flip flop we have to use J and K as the external inputs and D as the input of actual flip flop. J,K and Qn makes eight possible combinations. Express D in terms of J, K and Qn.
The conversion table, K-Maps and logic diagram for the conversion of D flip flop into JK flip flop is shown below:
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