Two-switch switched-capacitor converters

    公开(公告)号:US10075067B2

    公开(公告)日:2018-09-11

    申请号:US14659216

    申请日:2015-03-16

    CPC classification number: H02M3/07 H02M2003/072

    Abstract: Various examples are provided for two-switch switched-capacitor (SC) converters. In one example, a SC converter includes first and second switches connected in series, a first gain-extension network coupled to the first switch and a second gain-extension network coupled to the second switch, which can be operated to boost a voltage applied across the first and second switches. The gain-extension networks can include a diode and a capacitor. In another example, the gain-extension networks can include a switch and a capacitor, which can be operated to buck a voltage applied across the gain-extension networks. In another example, a SC converter includes first and second diodes connected in series, a first gain-extension network coupled to the first diode and a second gain-extension network coupled to the second diode. The gain-extension networks can include a switch and a capacitor, which can be operated to buck a voltage applied across the gain-extension networks.

    BLOCK COPOLYMERS OF CYCLIC ESTERS AND PROCESSES FOR PREPARING SAME

    公开(公告)号:US20180251593A1

    公开(公告)日:2018-09-06

    申请号:US15756131

    申请日:2017-06-29

    Abstract: Novel processes of preparing block polyester copolymers while precisely controlling the stereoconfiguration (e.g., tacticity), chemical composition and/or length of each unit (block) are provided. Block polyester copolymers featuring desirable combinations of two or more blocks featuring different stereoconfiguration (e.g., tacticity), chemical composition and/or length, including triblock, tetrablock and higher block copolymers are also provided. A novel family of organometallic magnesium complexes and uses thereof in preparing polyesters and block polyester copolymers are also provided.

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