Low-on-resistance high-flatness CMOS switching circuit with cold backup function

According to the low-on-resistance and high-flatness CMOS switching circuit with the cold backup function, the CMOS switching circuit comprises a CMOS switching module, a substrate potential control module and a switching control module, and through circuit design of all the modules, the switching c...

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Bibliographische Detailangaben
Hauptverfasser: WANG YING, CHEN YUQI, QU SHAOXIAN, CHU FEI, JIA LANCHAO, NING JINGYI, PENG LING, KONG YING, ZHANG XUEZI
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:According to the low-on-resistance and high-flatness CMOS switching circuit with the cold backup function, the CMOS switching circuit comprises a CMOS switching module, a substrate potential control module and a switching control module, and through circuit design of all the modules, the switching circuit has the advantages that output is high resistance after a power supply is switched off, and the flatness is high; an electric leakage path of an input port to a power supply, the ground or a post-stage circuit does not exist; the switching tube of the CMOS switching circuit adopts a structure that the substrate voltage follows the input voltage, so that the VBS voltage of the switching tube is reduced, the threshold voltage of the switching tube is reduced, and when the CMOS switch is switched on, the channel on-resistance is small and the on-resistance flatness is high; according to the invention, a power-off protection function is added on the basis of the CMOS switch, when the power supply voltage is cut