| 摘要 |
PURPOSE:To obtain the voltage that is always driven toward the safety in terms of control between the two signal voltages, by connecting both outputs of the 1st rectifying circuit to which the 1st signal is supplied and the 2nd rectifying circuit to which the 2nd signal is supplied to the common output terminal. CONSTITUTION:The input signal voltages -E1 and -E2 supplied from different detectors are applied to the input terminal 1. Each input signal is applied to the 1st rectifying circuit comprising the resistances R11, R12 and R13, the diodes D11 and D12 plus operational amplifier OA1 as well as to the 2nd rectifying circuit comprising the resistances R21, R22 and R23, diodes D21 and D22 plus operational amplifier OA2, respectively. The output of the rectifying circuit is utilized for control through the common output terminal 3. The larger one of the voltages E1 and E2 emerges at the terminal 3. At the same time, the outputs e1 and e2 of the operational amplifier are applied to the comparator COM via the diodes D13 and D23, and an alarm is delivered when the difference between e1 and e2 exceeds the prescribed value. |
