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公开(公告)号：US09831854B2
公开(公告)日：2017-11-28
申请号：US15345688
申请日：2016-11-08
Applicant: DENSO CORPORATION
Inventor： Yasuhiro NIshimura
CPC classification number: H03K5/01 , H02P31/00 , H02P2201/03 , H02P2205/01 , H02P2207/05
Abstract: A current is supplied from a power source voltage supply node of a power source voltage to an open-collector of a transistor through a current blocking circuit, connectors and a signal transmission line. A microcomputer regulates a resistance value of a pull-up resistor by switching over an on/off state of a switch circuit in accordance with the power source voltage detected by a power source voltage detection circuit. The microcomputer thus regulates a current blocking rate of the current blocking circuit.
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