| 摘要 |
PURPOSE:To control plural devices with simple constitution by using a D type FF to superpose serial data and a digital signal to be detected. CONSTITUTION:A D type FF401 containing set and reset terminals is provided together with AND circuits 402 and 403. The output of the circuit 402 is connected to the set terminal of the FF401, and at the same time the output of the circuit 403 is connected to the reset terminal R of the FF401. While the timing pulse ST is applied to the input terminal of the other side of the circuits 402 and 403 respectively. Then the digital signal J to be detected is applied to the other input terminal of the circuit 402, and the signal J is supplied to the other input terminal of the circuit 403 via an inverter 404. Thus the data signal to be applied to the FF401 is superposed on the digital signal to be detected synchronously with the timing pulse to obtain a serial signal Q. This signal Q is delivered. |
