鼠标单击按钮开关, 输出交替变化
输出信号的变化周期是输入的两倍.
https://cc.xiaogd.net/?startCircuitLink=https://book.xiaogd.net/cyjsjdmw-examples/assets/circuit/cyjsjdmw-ch08-10-d-flip-flop-with-feedback.txt
原图
https://cc.xiaogd.net/?startCircuitLink=https://book.xiaogd.net/cyjsjdmw-examples/assets/circuit/cyjsjdmw-ch08-11-d-flip-flop-with-feedback-sample.txt