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    Salivary biosensors and biofuel cells
    21.
    发明授权
    Salivary biosensors and biofuel cells 有权

    公开(公告)号：US10595759B2

    公开(公告)日：2020-03-24

    申请号：US15112816

    申请日：2015-01-21

    Applicant: The Regents of the University of California

    Inventor： Joseph Wang ,  Patrick Mercier

    IPC: A61B5/1486 ,  A61C19/04 ,  A61B5/00 ,  A61B5/145 ,  H01M8/16 ,  G01N27/327 ,  A61B10/00

    Abstract: Methods, systems, and devices are disclosed mouth-based biosensors and biofuel cells. In one aspect, an electrochemical sensor device for detecting analytes in saliva includes a substrate including an electrically insulative material, a first electrode disposed on the substrate at a first location, in which the first electrode includes a surface including a chemical agent (e.g., a catalyst or a reactant) corresponding to an analyte in saliva; and a second electrode disposed on the substrate at a second location separated from the first electrode by a spacing region, the first and second electrodes capable of sustaining a redox reaction involving the chemical agent and the analyte to produce an electrical signal, such that, when the device is present in the mouth of a user and electrically coupled to an electrical circuit, the device is operable to detect the analyte in the user's saliva.

    SUCCESSIVE APPROXIMATION DIGITAL VOLTAGE REGULATION METHODS, DEVICES AND SYSTEMS
    23.
    发明申请
    SUCCESSIVE APPROXIMATION DIGITAL VOLTAGE REGULATION METHODS, DEVICES AND SYSTEMS 审中-公开

    公开(公告)号：US20180226981A1

    公开(公告)日：2018-08-09

    申请号：US15888661

    申请日：2018-02-05

    Applicant: The Regents of the University of California

    Inventor： Loai Galal Bahgat Salem ,  Patrick Mercier

    IPC: H03M1/06 ,  G05F1/59

    CPC classification number: H03M1/0617 ,  G05F1/59 ,  H03M1/462 ,  H03M1/808

    Abstract: A low power voltage regulator includes a weighted transistor array having a plurality of transistor switches with a total conductance of G, corresponding to bits from a MSB to LSB. A transistor switch corresponding to the MSB has a conductance of G/2 and remaining bits have a consecutive descending conductance of G/2N to the LSB, and search time takes a low number of cycles by starting with the MSB. A redundant LSB transistor switch has the same G/2N conductance of the LSB. The redundant LSB is used to correct steady-state errors, and a proportional derivative controller compensates output voltage. The compensation in a method eliminates an output pole of the voltage regulator to provide a stable voltage regulator operation irrespective of load current, load capacitance, or sampling frequency. Voltage can be regulated via the additional LSB below the resolution limit via pulse width modulation.

    Self-powered biosensors
    26.
    发明授权
    Self-powered biosensors 有权

    公开(公告)号：US11633134B2

    公开(公告)日：2023-04-25

    申请号：US16785507

    申请日：2020-02-07

    Applicant: The Regents of the University of California

    Inventor： Joseph Wang ,  Patrick Mercier ,  Ali Fazli Yeknami ,  Somayeh Imani

    IPC: A61B5/00 ,  A61B5/1486 ,  H01M8/04858 ,  G01N27/327 ,  H01M8/16 ,  A61B5/145

    Abstract: Disclosed are self-powering biofuel cell and sensor devices, systems and techniques. In some aspects, a self-powered biosensing system includes an electronic circuit; an anode including an enzymatic layer electrically coupled to a power supply voltage terminal of the electronic circuit and configured to interact with an analyte in a fluid, such as glucose or lactate; and a cathode electrically coupled to a ground voltage terminal of the electronic circuit, where the electronic circuit is operable to control and use the electrical energy generated at the anode and cathode for powering the biosensing system and detecting a concentration of the analyte in the fluid.

    Near zero power fully integrated digital conversion, sensors and sensing methods
    27.
    发明授权
    Near zero power fully integrated digital conversion, sensors and sensing methods 有权

    公开(公告)号：US11444633B2

    公开(公告)日：2022-09-13

    申请号：US17285289

    申请日：2019-10-14

    Applicant: The Regents of the University of California

    Inventor： Hui Wang ,  Patrick Mercier

    IPC: H03M1/38 ,  G01K7/00 ,  H03M1/56

    Abstract: A charging to digital converter sensor in a CMOS integrated circuit digitizes a sensed property by comparing charging time between two paths and adjusting the charging rate of one of the two paths by increasing or decreasing the amount of capacitance in that path, until both of the two paths have the same charging time to reach respective constant with sensed property and proportional with sensed property reference voltages or currents. Sub nanowatt operation is achieved with preferred circuits. A method directly digitizes, on-chip, a charging time comparison of two ramp voltages that are compared to respective constant with sensed property and proportional with sensed property reference voltages or currents.

    LOW POWER MAGNETIC FIELD BODY AREA NETWORK WITH QUENCHING AND QUICK START
    28.
    发明申请
    LOW POWER MAGNETIC FIELD BODY AREA NETWORK WITH QUENCHING AND QUICK START 有权

    公开(公告)号：US20220095920A1

    公开(公告)日：2022-03-31

    申请号：US17429495

    申请日：2020-02-14

    Applicant: The Regents of the University of California

    Inventor： Patrick Mercier ,  Jiwoong Park

    IPC: A61B5/00 ,  H04B13/00

    Abstract: A transmitter for a magnetic body area network includes a power oscillator that directly uses a body coil as a resonant element. Shunt transistor circuitry is between the power oscillator and the body coil, the shunt transistor circuitry selectively shunts current from the body coil in response to a data signal provided to the transmitter. Power injection circuitry is synchronized to the power oscillator to selectively inject power into the body coil in response to the data signal. A tuning capacitor array is disposed to tune frequency in the body coil. A frequency-locked-loop responds to a frequency in the body coil and tunes the tuning capacitor array to lock to a carrier frequency. Very high Q coils can be used while achieving high data transmission rates of 5 mbps to 10 mbps. Transmitters and methods are applicable to on-off-key modulation, frequency-shift modulation and amplitude-shift modulation.

    Successive approximation digital voltage regulation methods, devices and systems
    30.
    发明授权
    Successive approximation digital voltage regulation methods, devices and systems 有权

    公开(公告)号：US10224944B2

    公开(公告)日：2019-03-05

    申请号：US15888661

    申请日：2018-02-05

    Applicant: The Regents of the University of California

    Inventor： Loai Galal Bahgat Salem ,  Patrick Mercier

    IPC: H03M1/22 ,  H03M1/06 ,  G05F1/59 ,  H03M1/46 ,  H03M1/80

    Abstract: A low power voltage regulator includes a weighted transistor array having a plurality of transistor switches with a total conductance of G, corresponding to bits from a MSB to LSB. A transistor switch corresponding to the MSB has a conductance of G/2 and remaining bits have a consecutive descending conductance of G/2N to the LSB, and search time takes a low number of cycles by starting with the MSB. A redundant LSB transistor switch has the same G/2N conductance of the LSB. The redundant LSB is used to correct steady-state errors, and a proportional derivative controller compensates output voltage. The compensation in a method eliminates an output pole of the voltage regulator to provide a stable voltage regulator operation irrespective of load current, load capacitance, or sampling frequency. Voltage can be regulated via the additional LSB below the resolution limit via pulse width modulation.

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