So, write down the excitation values of D flip-flop for each combination of present state and next state values. We know that D flip-flop has single input D. Therefore, consider the following characteristic table of T flip-flop. Here, the given flip-flop is D flip-flop and the desired flip-flop is T flip-flop. D Flip-Flop to other Flip-Flop Conversionsįollowing are the three possible conversions of D flip-flop to other flip-flops. Similarly, you can do other two conversions. So, the overall circuit has single input, D and two outputs Q(t) & Q(t)'. This inverter produces an output, which is complement of input, D. This circuit consists of SR flip-flop and an inverter. The circuit diagram of D flip-flop is shown in the following figure. So, we got S = D & R = D' after simplifying. We can use 2 variable K-Maps for getting simplified expressions for these inputs.
D flip-flop inputįrom the above table, we can write the Boolean functions for each input as below. The following table shows the characteristic table of D flip-flop along with the excitation inputs of SR flip-flop. So, write down the excitation values of SR flip-flop for each combination of present state and next state values. We know that SR flip-flop has two inputs S & R. Therefore, consider the following characteristic table of D flip-flop. Here, the given flip-flop is SR flip-flop and the desired flip-flop is D flip-flop. SR Flip-Flop to other Flip-Flop Conversionsįollowing are the three possible conversions of SR flip-flop to other flip-flops. Follow the same process for remaining flipflop conversions. Now, let us convert few flip-flops into other. If necessary, use Kmaps for simplifying.ĭraw the circuit diagram of desired flip-flop according to the simplified expressions using given flip-flop and necessary logic gates. Get the simplified expressions for each excitation input.
The excitation table for all flip-flops is shown below. So, there will be total of twelve flip-flop conversions.įollow these steps for converting one flip-flop to the other.Ĭonsider the characteristic table of desired flip-flop.įill the excitation values (inputs) of given flip-flop for each combination of present state and next state. We can convert one flip-flop into the remaining three flip-flops by including some additional logic. In previous chapter, we discussed the four flip-flops, namely SR flip-flop, D flip-flop, JK flip-flop & T flip-flop.
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