The frequency division circuit plays an extremely important role in whether the speaker system can restore the electroacoustic signal with high quality. Especially in the mid- and high-frequency parts, the role of the frequency division circuit is more obvious. It is very convenient to use JK-FF to achieve 3-way frequency division in the figure, and synchronous counting frequency division can be achieved without adding any logic circuit. The 3-way frequency division of D-FF can also use AND gate to decode Q2 and Q1 to realize return to zero. The three-way frequency division circuit using the trigger is shown in the figure:
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