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    Circuit and method for generating a reference voltage with a voltage regulator and a sample and hold circuit
    2.
    发明授权
    Circuit and method for generating a reference voltage with a voltage regulator and a sample and hold circuit 有权

    公开(公告)号：US10719096B2

    公开(公告)日：2020-07-21

    申请号：US15248888

    申请日：2016-08-26

    Applicant: Texas Instruments Incorporated

    Inventor： James Murdock ,  Danielle Griffith ,  Per Torstein Roine

    IPC: G05F1/575 ,  G11C5/14 ,  G11C27/02

    Abstract: A reference generator provides a reference output voltage that is continuously available while providing certain efficiencies of a duty-cycled voltage regulator. The reference output voltage is generated by a sample-and-hold circuit that is coupled to a voltage regulator. On command, the sample-and-hold circuit samples a low dropout voltage regulator that may be referenced by a bandgap circuit. During hold periods of the sample-and-hold circuit, the voltage regulator, in particular the bandgap circuit, may be disabled in order to conserve power. A sample cycle by the sample-and-hold circuit may be triggered by a signal received from a configurable finite state machine. The reference generator is effectively duty cycled in a manner that conserves available battery power, while still providing a constant reference output that is always available. The reference generator is especially suited for low-power, battery operated applications.

    Circuit and method for generating a reference voltage with a voltage regulator and a sample and hold circuit
    3.
    发明授权
    Circuit and method for generating a reference voltage with a voltage regulator and a sample and hold circuit 有权

    公开(公告)号：US11416015B2

    公开(公告)日：2022-08-16

    申请号：US16918051

    申请日：2020-07-01

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： James Murdock ,  Danielle Griffith ,  Per Torstein Roine

    IPC: G05F1/575 ,  G11C5/14 ,  G11C27/02

    Abstract: A reference generator provides a reference output voltage that is continuously available while providing certain efficiencies of a duty-cycled voltage regulator. The reference output voltage is generated by a sample-and-hold circuit that is coupled to a voltage regulator. On command, the sample-and-hold circuit samples a low dropout voltage regulator that may be referenced by a bandgap circuit. During hold periods of the sample-and-hold circuit, the voltage regulator, in particular the bandgap circuit, may be disabled in order to conserve power. A sample cycle by the sample-and-hold circuit may be triggered by a signal received from a configurable finite state machine. The reference generator is effectively duty cycled in a manner that conserves available battery power, while still providing a constant reference output that is always available. The reference generator is especially suited for low-power, battery operated applications.

    Low Dropout Nanoamp Bandgap
    5.
    发明申请
    Low Dropout Nanoamp Bandgap 审中-公开

    公开(公告)号：US20180059697A1

    公开(公告)日：2018-03-01

    申请号：US15248888

    申请日：2016-08-26

    Applicant: Texas Instruments Incorporated

    Inventor： James Murdock ,  Danielle Griffith ,  Per Torstein Roine

    IPC: G05F1/575 ,  G11C27/02

    CPC classification number: G05F1/575 ,  G11C5/147 ,  G11C27/02

    Abstract: A reference generator provides a reference output voltage that is continuously available while providing certain efficiencies of a duty-cycled voltage regulator. The reference output voltage is generated by a sample-and-hold circuit that is coupled to a voltage regulator. On command, the sample-and-hold circuit samples a low dropout voltage regulator that may be referenced by a bandgap circuit. During hold periods of the sample-and-hold circuit, the voltage regulator, in particular the bandgap circuit, may be disabled in order to conserve power. A sample cycle by the sample-and-hold circuit may be triggered by a signal received from a configurable finite state machine. The reference generator is effectively duty cycled in a manner that conserves available battery power, while still providing a constant reference output that is always available. The reference generator is especially suited for low-power, battery operated applications.

    Voltage monitor using a capacitive digital-to-analog converter
    6.
    发明授权
    Voltage monitor using a capacitive digital-to-analog converter 有权

    公开(公告)号：US11852663B2

    公开(公告)日：2023-12-26

    申请号：US17824505

    申请日：2022-05-25

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Rajat Chauhan ,  Danielle Griffith ,  Per Torstein Roine ,  James Murdock ,  Bernhard Ruck

    IPC: G01R19/257 ,  H03M1/66 ,  G01R31/3835

    CPC classification number: G01R19/257 ,  G01R31/3835 ,  H03M1/66

    Abstract: One example relates to a monitoring circuit that includes a capacitive digital-to-analog converter that receives a binary code, a reference voltage, a monitored voltage, and a ground reference, the capacitive digital-to-analog converter outputting an analog signal based on the binary code, the reference voltage, the monitored voltage, and the ground reference. The monitoring circuit further includes a comparator including a first input coupled to receive the analog signal and a second input coupled to the reference voltage, the comparator comparing the analog signal to the reference voltage and outputting a comparator signal based on the comparison. The monitoring circuit yet further includes a binary code generator that generates the binary code based on the comparator signal, the binary code approximating a magnitude of the monitored voltage.

    Voltage monitor using a capacitive digital-to-analog converter
    7.
    发明授权
    Voltage monitor using a capacitive digital-to-analog converter 有权

    公开(公告)号：US11372032B2

    公开(公告)日：2022-06-28

    申请号：US15717219

    申请日：2017-09-27

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Rajat Chauhan ,  Danielle Griffith ,  Per Torstein Roine ,  James Murdock ,  Bernhard Ruck

    IPC: G01R19/257 ,  H03M1/66 ,  G01R31/3835

    Abstract: One example relates to a monitoring circuit that includes a capacitive digital-to-analog converter that receives a binary code, a reference voltage, a monitored voltage, and a ground reference, the capacitive digital-to-analog converter outputting an analog signal based on the binary code, the reference voltage, the monitored voltage, and the ground reference. The monitoring circuit further includes a comparator including a first input coupled to receive the analog signal and a second input coupled to the reference voltage, the comparator comparing the analog signal to the reference voltage and outputting a comparator signal based on the comparison. The monitoring circuit yet further includes a binary code generator that generates the binary code based on the comparator signal, the binary code approximating a magnitude of the monitored voltage.

    Set point adjuster for oscillator driver
    8.
    发明授权
    Set point adjuster for oscillator driver 有权

    公开(公告)号：US10069501B2

    公开(公告)日：2018-09-04

    申请号：US15070810

    申请日：2016-03-15

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Kunhee Cho ,  Danielle Griffith ,  James Murdock ,  Per Torstein Roine

    IPC: H03L7/099 ,  H03L5/00 ,  H03B5/00 ,  H03B1/00 ,  H03B5/08 ,  H03B5/32 ,  H04W84/18 ,  H03B5/36

    Abstract: A circuit includes an oscillator having a driver and a resonator. The driver receives a supply voltage at a supply input and provides a drive output to drive the resonator to generate an oscillator output signal. A power converter receives an input voltage and generates the supply voltage to the supply input of the driver. The power converter varies the supply voltage based on an adjust command supplied to a command input of the power converter. A detector monitors a voltage level of the oscillator output signal. A controller sets the adjust command to the power converter to control the supply voltage to the supply input of the driver such that the voltage level of the oscillator output signal is set at or above a predetermined threshold voltage.

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