Further, according to the present aspect, since the forward voltage drop comparable with the forward voltage drop caused by the first diode can be generated between the first power supply and {HEAD ~ the first device} by {TAIL ~ the third diode}, the first predetermined voltage is properly supplied to the first device 
by
Further , according to the present aspect , since the forward voltage drop comparable with the forward voltage drop caused by the first diode can be generated between the first power supply and { HEAD ~ the first device } by { TAIL ~ the third diode } , the first predetermined voltage is properly supplied to the first device
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