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JK Flip-Flop

The JKFF simplifies the RSFF truth table but keeps two inputs (figure 7.22). The toggle state is useful in counting circuits. If the C pulse is too long this state is undefined and hence the JKFF can only be used with rigidly defined short clock pulses.

Figure 7.22:  The basic JK flip-flop constructed from an RS flip-flop and gates, and its schematic symbol and truth table.

Doug Gingrich
Tue Jul 13 16:55:15 EDT 1999