| 摘要 |
PURPOSE:To perform stable signal transmission without receiving any influence from the voltage rising time caused by the frequency of a power supply voltage by setting breaking time in corresponding to the power supply frequency. CONSTITUTION:The zero cross L0 of a voltage is detected and, when the voltage is L0, transmitting data are decided whether they are '1' and '0' signals. When the data are '0' signals, an 'ON' signal is continuously set to the gate of a triode AC switch. When the data are '1' signals, a transmission timer is started and the gate signal of the triode AC switch is set to 'OFF'. The time of the transmission timer is decided until signal time T comes and, when the time of the timer exceeds the signal time T, the gate signal of the triode AC switch is set to 'ON' and the timer is reset. Communication is performed by repeating the above-mentioned operations.
|
