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Connecting the output feedback to the input in SR flip – flop.We can construct a T flip – flop by any of the following methods: It has one Toggle input (T) & one clock signal input (CLK). The logic symbol of T flip – flop is shown below. So, a T flip – flop is sometimes called as single input JK flip – flop. The T flip – flop is a single input device and hence by connecting J and K inputs together and giving them with single input called T, we can convert a JK flip – flop into T flip – flop. We can design the T flip – flop by making simple modifications to the JK flip – flop. Toggling means ‘Changing the next state output to complement of the present state output’. Then the flip – flop acts as a Toggle switch.

To avoid the occurrence of intermediate state (also known as the forbidden state) in SR flip – flop, we should provide only one input to the flip – flop called the Trigger input or Toggle input (T). T flip – flop is also known as “Toggle Flip – flop”. 2-Bit Parallel Load Register using T flip – flops.