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    T Flip-Flop

    Another type of flip-flop found in textbooks is the T (toggle) flip-flop. This flip-flop, shown in Fig. 1-22, is obtained from a JK type when inputs j and K are connected to provide a single input designated by T. The T flip-flop therefore has only two conditions. When T = 0 (J= K = 0) a clock transition does not change the state of the flip-flop. When T = 1( J= K = 1) a clock transition complements the state of the flip-flop. These conditions can be expressed by a characteristic equation:

    Q(t + 1) = Q(t) ? T

    Figure 1-22


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