| 摘要 |
PROBLEM TO BE SOLVED: To obtain a sensor circuit by which the number of power-supply circuits and signal processing circuits is reduced by sequentially processing output signals of respective sensors inside a power-supply section and distributing them according to a changeover timing. SOLUTION: A power-supply line 52 is connected to sensors 1A to 1C one after another, and a power is supplied at a prescribed cycle from a power-supply circuit 7. Output signals of the sensors 1A to 1C are signal-processed sequentially by a changeover-signal processing circuit 2 via a multiplexer 10 by changeover signals S0 , S1 . A timing circuit 11 corresponds to the changed-over sensors together with the signals S0 , S1 , it outputs a latch trigger A after rise timings of the sensors 1A to 1C, and it outputs respective latch triggers B, C after the time T2 and the time T2 within respective lighting sections. And, whenever sensor output signals are output from the circuit 2, they are latched by latches 6A, 6B, 6C. As a result, the number of circuits 7, consequently the number of supply lines 52, can be reduced by one with reference to a plurality of sensor groups, the circuit 2 is sufficient in one piece, and the circuits 2, 7 are reduced. |
