| 摘要 |
PURPOSE:To attain highly reliable remote control by providing a switch circuit changing over alternately a power circuit and a signal generating circuit and connecting them to a two-core cable. CONSTITUTION:A transistor (TR)6 is turned off by a signal from a signal control circuit 10 generated in response to the combustion state at a time t1, and a digital signal comprising combination of ''1'' and ''0'' is generated. This signal is transmitted to an operating circuit block B through lines 12 and 13 and a signal including the indication setting of a control circuit 19 is generated between lines 12 and 13. TRs 4, 3 are turned off by the indication of the circuit 10 at a time t2. Thus, a voltage of the lines 12, 13 is increased up to a charging voltage of a capacitor 2 and the said digital signal is generated again at a time t3. The indication setting signal by an operating device B is fetched to the circuit 10 during the periods t1-t2, t3-t4..., is subject to sample-and-hold to attain the indication of the operation of a fuel control circuit 11 or the setting of conditions. |
