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Title:
START-UP AND SHUT-DOWN CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2017/202304
Kind Code:
A1
Abstract:
A start-up and shut-down circuit, comprising: a PMOS tube, a switch, a triode and an RC parallel circuit, wherein a source electrode of the PMOS tube is connected to an external power supply input end, and a drain electrode thereof serves as an internal power supply input end, with the internal power supply input end connected to a pre-powered-on interface of a CPU via a conversion loop, and the conversion loop converting a voltage of the internal power supply input end to a high-level voltage of the pre-powered-on interface of the CPU; the switch is connected to the source electrode of the PMOS tube and the external power supply input end; and a base electrode of the triode is connected to the pre-powered-on interface of the CPU and the RC parallel circuit, a collector electrode is connected to a gate electrode of the PMOS tube, and an emitter electrode is grounded. The present invention perfectly realizes a scheduled start-up function, and on the premise of reserving a soft shut-down function, hard start-up by means of touch is realized, which is applicable to terminal devices, such as a set-top box.

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Inventors:
HUANG, Linzhi (ZTE Plaza, Keji Road South Hi-Tech Industrial Park, Nanshan Distric, Shenzhen Guangdong 7, 518057, CN)
DAI, Dongfei (ZTE Plaza, Keji Road South Hi-Tech Industrial Park, Nanshan Distric, Shenzhen Guangdong 7, 518057, CN)
WANG, Xumao (ZTE Plaza, Keji Road South Hi-Tech Industrial Park, Nanshan Distric, Shenzhen Guangdong 7, 518057, CN)
ZHU, Jingyi (ZTE Plaza, Keji Road South Hi-Tech Industrial Park, Nanshan Distric, Shenzhen Guangdong 7, 518057, CN)
Application Number:
CN2017/085533
Publication Date:
November 30, 2017
Filing Date:
May 23, 2017
Export Citation:
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Assignee:
ZTE CORPORATION (ZTE Plaza, Keji Road South Hi-Tech Industrial Park, Nanshan Distric, Shenzhen Guangdong 7, 518057, CN)
International Classes:
H03K17/687
Foreign References:
CN203537358U2014-04-09
CN202798044U2013-03-13
CN1674438A2005-09-28
CN204928783U2015-12-30
CN201004620Y2008-01-09
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (Floor 16, Tower A Indo Building,A48 Zhichun Road, Haidian District, Beijing 8, 100098, CN)
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