| 摘要 |
PURPOSE:To ensure the easy generation of the code signal for actuation of the control subject, by applying the output signal sent from the remote control receiver to the input part of the key matrix and then narrowing the duty of the strobe pulse of the key scan signal. CONSTITUTION:The signal is delivered from remote control transmitter 1 by the key operation of key matrix part 2. And the BCD code, for instance, is generated to transmission line 3 to be applied to remote control receiver 4. In case no signal is delivered from receiver 4, the code is delivered in the form of 0000. This output of receiver 4 is applied to input port 12 via diodes 16-19 plus 20-23. And 1 is generated to line B when logic 1 is delivered to either receiver 4. This output is applied to output port 13 via logic part 14, and the scan signal generated from port 13 is applied to matrix 11. Furthermore, the output of matrix 11 is applied to port 12. Thus the duty of the strobe pulse is narrowed to secure the steady code signal to control subject 15 which is delivered from port 13. |
