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