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    Physically unclonable function with precharge through bit lines
    1.
    发明授权
    Physically unclonable function with precharge through bit lines 有权

    公开(公告)号：US11539536B2

    公开(公告)日：2022-12-27

    申请号：US16850606

    申请日：2020-04-16

    Applicant: Silicon Laboratories Inc.

    Inventor： Jeffrey L. Sonntag ,  Hatem M. Osman ,  Gang Yuan

    IPC: H04L9/32 ,  G11C7/12 ,  G11C7/10 ,  H03M1/66 ,  G11C11/412 ,  G11C5/14 ,  G11C11/419

    Abstract: A physically unclonable function (PUF) includes a bit cell that includes a latch and a switch to selectively couple the latch to a supply voltage node. A first transmission gate couples a first bit line to a first internal node of the latch and a second transmission gate couples a second bit line to a second internal node of the latch. A digital to analog converter (DAC) circuit is selectively coupled to the first internal node through the first bit line and the first transmission gate and to the second internal node through the second bit line and the second transmission gate, to thereby precharge the latch before the first bit cell is read. The latch regenerates responsive to the switch being closed to connect the latch to the supply voltage node. The first and second bit lines are used to read the regenerated value of the latch.

    LOW POWER BOOST CONVERTER STARTUP WITH SOFT START AND OUTPUT VOLTAGE OVERSHOOT LIMITING
    3.
    发明公开
    LOW POWER BOOST CONVERTER STARTUP WITH SOFT START AND OUTPUT VOLTAGE OVERSHOOT LIMITING 审中-公开

    公开(公告)号：US20230387800A1

    公开(公告)日：2023-11-30

    申请号：US17828993

    申请日：2022-05-31

    Applicant: Silicon Laboratories Inc.

    Inventor： Srikanth Govindarajulu ,  Hatem M. Osman ,  Michael D. Mulligan

    IPC: H02M3/158 ,  H02M1/36

    CPC classification number: H02M3/158 ,  H02M1/36

    Abstract: A method for operating a DC-DC converter circuit includes, in response to detecting a startup condition, charging an output capacitance coupled to an output node of the DC-DC converter circuit at a first rate in a first phase of a multi-phase startup mode of operation of the DC-DC converter circuit. The method includes, in response to an indication of an output voltage on the output node approaching an input voltage on an input node of the DC-DC converter circuit, controlling a current through an inductor using an oscillating signal in a second phase of the multi-phase startup mode of operation, thereby adjusting the output voltage to equal a target voltage level. The first rate may be the rate of charging an RC circuit including the output capacitance coupled to the output node.

    PHYSICALLY UNCLONABLE FUNCTION WITH PRECHARGE THROUGH BIT LINES
    4.
    发明申请
    PHYSICALLY UNCLONABLE FUNCTION WITH PRECHARGE THROUGH BIT LINES 有权

    公开(公告)号：US20210328817A1

    公开(公告)日：2021-10-21

    申请号：US16850606

    申请日：2020-04-16

    Applicant: Silicon Laboratories Inc.

    Inventor： Jeffrey L. Sonntag ,  Hatem M. Osman ,  Gang Yuan

    IPC: H04L9/32 ,  G11C7/12 ,  G11C7/10 ,  G11C11/419 ,  G11C11/412 ,  G11C5/14 ,  H03M1/66

    Abstract: A physically unclonable function (PUF) includes a bit cell that includes a latch and a switch to selectively couple the latch to a supply voltage node. A first transmission gate couples a first bit line to a first internal node of the latch and a second transmission gate couples a second bit line to a second internal node of the latch. A digital to analog converter (DAC) circuit is selectively coupled to the first internal node through the first bit line and the first transmission gate and to the second internal node through the second bit line and the second transmission gate, to thereby precharge the latch before the first bit cell is read. The latch regenerates responsive to the switch being closed to connect the latch to the supply voltage node. The first and second bit lines are used to read the regenerated value of the latch.

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