中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

12 records (took 0.013 seconds)

    Area-efficient high-accuracy bandgap voltage reference circuit
    1.
    发明授权
    Area-efficient high-accuracy bandgap voltage reference circuit 有权

    公开(公告)号：US10054968B2

    公开(公告)日：2018-08-21

    申请号：US15266947

    申请日：2016-09-15

    Applicant: Xilinx, Inc.

    Inventor： Umanath R. Kamath ,  John K. Jennings

    IPC: G05F1/10 ,  G05F3/02 ,  G05F1/46

    CPC classification number: G05F1/468 ,  G05F3/30

    Abstract: An integrated circuit includes a reference voltage circuit. The reference voltage circuit includes a bipolar junction transistor (BJT) configured to receive a first current during a first phase of a clock cycle to generate a first base-emitter junction voltage, and receive a second current during a second phase of the clock cycle to generate a second base-emitter junction voltage. The reference voltage circuit includes a switched capacitor circuit configured to provide a reference voltage associated with the first base-emitter junction voltage and the second base-emitter junction voltage.

    Programmable temperature coefficient analog second-order curvature compensated voltage reference
    2.
    发明授权
    Programmable temperature coefficient analog second-order curvature compensated voltage reference 有权

    公开(公告)号：US10290330B1

    公开(公告)日：2019-05-14

    申请号：US15832515

    申请日：2017-12-05

    Applicant: Xilinx, Inc.

    Inventor： Umanath R. Kamath ,  John K. Jennings ,  Edward Cullen ,  Ionut C. Cical ,  Darragh Walsh

    IPC: G11C5/14 ,  G05F3/24 ,  G01K7/01

    Abstract: An example voltage reference circuit includes: a reference circuit comprising a first circuit configured to generate a proportional-to-temperature current and corresponding first control voltage and a second circuit configured to generate a complementary-to-temperature current and corresponding second control voltage; a first current source coupled to a first load circuit, the first current source generating a sum current of the proportional-to-temperature current and the complementary-to-temperature current in response to the first and second control voltages, the first load circuit generating a zero temperature coefficient (Tempco) voltage from the sum current; and a second current source coupled to a second load circuit, the second current source generating the sum current of the proportional-to-temperature current and the complementary-to-temperature current in response to the first and second control voltages, the second load circuit generating a negative Tempco voltage from the sum current and the complementary-to-temperature current.

    Trim techniques for voltage reference circuits
    3.
    发明授权
    Trim techniques for voltage reference circuits 有权

    公开(公告)号：US10120399B1

    公开(公告)日：2018-11-06

    申请号：US15848357

    申请日：2017-12-20

    Applicant: Xilinx, Inc.

    Inventor： Umanath R. Kamath ,  Edward Cullen ,  John K. Jennings

    IPC: G05F1/46 ,  G06F1/20

    Abstract: An example method of trimming a voltage reference in an integrated circuit (IC) includes at a first temperature, sequencing through a first plurality of trim codes for a reference circuit of the voltage reference configured to generate a proportional-to-temperature current and a corresponding first control voltage, and a complementary-to-temperature current and a corresponding second control voltage. The method further includes measuring a voltage output of the voltage reference for each of the first plurality of trim codes to obtain first voltage output values. The method further includes at a second temperature, sequencing through a second plurality of trim codes for the reference circuit. The method further includes measuring the voltage output of the voltage reference for each of the second plurality of trim codes to obtain second voltage output values. The method further includes selecting a trim code for the reference circuit based on the first voltage output values and the second voltage output values.

    Bias current variation correction for complementary metal-oxide-semiconductor (CMOS) temperature sensor
    5.
    发明授权
    Bias current variation correction for complementary metal-oxide-semiconductor (CMOS) temperature sensor 有权

    公开(公告)号：US11181426B1

    公开(公告)日：2021-11-23

    申请号：US16268124

    申请日：2019-02-05

    Applicant: Xilinx, Inc.

    Inventor： Edward Cullen ,  Umanath R. Kamath ,  John K. Jennings ,  Diarmuid Collins ,  Ionut C. Cical

    IPC: G01K7/00 ,  G01K15/00 ,  G01K7/01 ,  G01K1/00

    Abstract: A temperature sensor includes a current source to produce a first bias current and a second bias current, a plurality of diodes, and temperature estimation circuitry. The plurality of diodes includes at least a first diode to receive the first bias current and a second diode to receive the second bias current. The temperature estimate circuitry measures a first voltage bias across the first diode resulting from the first bias current and a second voltage bias across the second diode resulting from the second bias current, and estimates a temperature of an environment of the temperature sensor based at least in part on the first voltage bias and the second voltage bias. The temperature sensor further includes error detection circuitry to measure at least one of the first or second bias currents and determine an amount of error in the temperature estimate based at least in part on the measurement.

    Dynamic element matching in an integrated circuit
    8.
    发明授权
    Dynamic element matching in an integrated circuit 有权

    公开(公告)号：US10545053B2

    公开(公告)日：2020-01-28

    申请号：US15616765

    申请日：2017-06-07

    Applicant: Xilinx, Inc.

    Inventor： Umanath R. Kamath ,  Padraig Kelly ,  John K. Jennings

    IPC: G01K7/00 ,  G01K7/01 ,  H03K19/003 ,  H03K19/0175 ,  G01K1/02

    Abstract: An example dynamic element matching (DEM) circuit includes: a plurality of bipolar junction transistors (BJTs), each of the plurality of BJTs having a base terminal and a collector terminal coupled to electrical ground; a plurality of pairs of force switches, each pair of force switches coupled to an emitter of a respective one of the plurality of BJTs; a plurality of pairs of sense switches, where each pair of sense switches is coupled to the emitter of a respective one of the plurality of BJTs, a first switch in each pair of sense switches is coupled to a first node, and a second switch in each pair of sense switches is coupled to a second node; a first current source coupled to a first switch in each pair of force switches; and a second current source coupled to a second switch in each pair of force switches.

    PROGRAMMABLE TEMPERATURE COEFFICIENT ANALOG SECOND-ORDER CURVATURE COMPENSATED VOLTAGE REFERENCE
    9.
    发明申请
    PROGRAMMABLE TEMPERATURE COEFFICIENT ANALOG SECOND-ORDER CURVATURE COMPENSATED VOLTAGE REFERENCE 审中-公开

    公开(公告)号：US20190172504A1

    公开(公告)日：2019-06-06

    申请号：US15832515

    申请日：2017-12-05

    Applicant: Xilinx, Inc.

    Inventor： Umanath R. Kamath ,  John K. Jennings ,  Edward Cullen ,  Ionut C. Cical ,  Darragh Walsh

    IPC: G11C5/14 ,  G01K7/01 ,  G05F3/24

    Abstract: An example voltage reference circuit includes: a reference circuit comprising a first circuit configured to generate a proportional-to-temperature current and corresponding first control voltage and a second circuit configured to generate a complementary-to-temperature current and corresponding second control voltage; a first current source coupled to a first load circuit, the first current source generating a sum current of the proportional-to-temperature current and the complementary-to-temperature current in response to the first and second control voltages, the first load circuit generating a zero temperature coefficient (Tempco) voltage from the sum current; and a second current source coupled to a second load circuit, the second current source generating the sum current of the proportional-to-temperature current and the complementary-to-temperature current in response to the first and second control voltages, the second load circuit generating a negative Tempco voltage from the sum current and the complementary-to-temperature current.

Patent Agency Ranking