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1102 条记录 (耗时 0.028 秒)

    DYNAMIC TUNING OF AN RFID RECEIVER TO ACHIEVE SUBSTANTIALLY MAXIMUM RECEIVED SIGNAL STRENGTH
    3.
    发明公开
    DYNAMIC TUNING OF AN RFID RECEIVER TO ACHIEVE SUBSTANTIALLY MAXIMUM RECEIVED SIGNAL STRENGTH 审中-公开

    公开(公告)号：US20240265227A1

    公开(公告)日：2024-08-08

    申请号：US18641503

    申请日：2024-04-22

    申请人： RFMicron, Inc.

    发明人： Shahriar Rokhsaz

    IPC分类号： G06K19/07 ,  H03J3/20 ,  H04B5/77 ,  H04B17/318

    CPC分类号： G06K19/0726 ,  H03J3/20 ,  H04B5/77 ,  H04B17/318 ,  H03J2200/10

    摘要： A method includes receiving, by a radio frequency identification (RFID) receiver, an electromagnetic propagated radio frequency (RF) signal. The method further includes capturing, by a current field strength detector circuit, a first current response of the tuning circuit to received signal strength of the RF signal; varying, by a tuning circuit, the variable capacitor in a first tuning direction; capturing, by the current field strength detector circuit, a second current response of the tuning circuit to the received signal strength of the RF signal; and comparing, by the current field strength detector circuit, the captured first response to the captured second response. When the captured second response is weaker than the captured first response, the method further includes varying, by the tuning circuit, the variable capacitor in a second tuning direction, and adjusting the variable capacitor in the second tuning direction until a substantially maximum received signal strength is reached.

    Computing device for processing environmental sensed conditions
    4.
    发明授权
    Computing device for processing environmental sensed conditions 有权

    公开(公告)号：US11831351B2

    公开(公告)日：2023-11-28

    申请号：US17305128

    申请日：2021-06-30

    申请人： RFMicron, Inc.

    发明人： Shahriar Rokhsaz

    IPC分类号： H04B1/713 ,  H04B17/318 ,  H03J3/20 ,  H04B5/00 ,  H04W4/80

    CPC分类号： H04B1/713 ,  H03J3/20 ,  H04B5/0062 ,  H04B17/318 ,  H04W4/80 ,  H03J2200/10

    摘要： A passive wireless temperature sensor includes a radio frequency (RF) front end having a variable input impedance. The RF front end includes an antenna operable to receive an RF signal having a particular carrier frequency and a tuning circuit having a resonant frequency corresponding to the particular carrier frequency. The passive wireless temperature sensor further includes one or more temperature sensing elements coupled to the RF front end. When sensing a temperature, the one or more temperature sensing elements cause a change in the variable input impedance. The passive wireless temperature sensor further includes a processing module operably coupled to the RF front end operable to adjust the resonant frequency of the tuning circuit to compensate for the change in the variable input impedance and generate a coded value representative of the change. The coded value representative of the change corresponds to the sensed temperature.

    Frequency-agile clock multiplier
    6.
    发明申请
    Frequency-agile clock multiplier 审中-公开

    公开(公告)号：US20190222217A1

    公开(公告)日：2019-07-18

    申请号：US16247894

    申请日：2019-01-15

    申请人： Rambus Inc.

    发明人： Jared L. Zerbe ,  Brian S. Leibowitz ,  Masum Hossain

    IPC分类号： H03L7/16 ,  H03L7/24 ,  H03K5/14 ,  H03K3/03 ,  H03L7/06 ,  H03K5/00 ,  H03K5/13 ,  H03L7/099

    CPC分类号： H03L7/16 ,  H03J2200/10 ,  H03K3/0315 ,  H03K5/00006 ,  H03K5/13 ,  H03K5/14 ,  H03L7/06 ,  H03L7/0995 ,  H03L7/24

    摘要： In a first clock frequency multiplier, multiple injection-locked oscillators (ILOs) having spectrally-staggered lock ranges are operated in parallel to effect a collective input frequency range substantially wider than that of a solitary ILO. After each input frequency change, the ILO output clocks may be evaluated according to one or more qualifying criteria to select one of the ILOs as the final clock source. In a second clock frequency multiplier, a flexible-injection-rate injection-locked oscillator locks to super-harmonic, sub-harmonic or at-frequency injection pulses, seamlessly transitioning between the different injection pulse rates to enable a broad input frequency range. The frequency multiplication factor effected by the first and/or second clock frequency multipliers in response to an input clock is determined on the fly and then compared with a programmed (desired) multiplication factor to select between different frequency-divided instances of the frequency-multiplied clock.

    APPARATUS AND METHOD FOR CONTROLLING A TRANSITION OF A VARIABLE CAPACITOR
    8.
    发明申请
    APPARATUS AND METHOD FOR CONTROLLING A TRANSITION OF A VARIABLE CAPACITOR 审中-公开

    公开(公告)号：US20180323772A1

    公开(公告)日：2018-11-08

    申请号：US15589694

    申请日：2017-05-08

    申请人： Futurewei Technologies, Inc.

    发明人： Ping Shi

    IPC分类号： H03J3/20 ,  H01G7/00 ,  H03H7/38

    CPC分类号： H03J3/20 ,  H01G7/00 ,  H03H7/38 ,  H03J2200/10

    摘要： An apparatus and associated method are provided involving one or more registers configured to store a plurality of values including a first value corresponding with a first capacitance, and a second value corresponding with a second capacitance. Further included is a decoder configured to decode the values into corresponding capacitive settings. Also included is one or more capacitive elements in electrical communication with the decoder. Such one or more capacitive elements are configured to exhibit different capacitances, based on the capacitive settings. Also included is control circuitry in electrical communication with the decoder and the one or more registers. Such control circuitry is configured to control a transition of the capacitance of the one or more capacitive elements from the first capacitance to the second capacitance, by creating a plurality of additional values between the first value and the second value for being decoded by the decoder.

    SENSOR WITH TAIL OR TRANSMISSION LINE FOR VEHICLE LEAK TESTING
    10.
    发明申请
    SENSOR WITH TAIL OR TRANSMISSION LINE FOR VEHICLE LEAK TESTING 审中-公开

    公开(公告)号：US20180196977A1

    公开(公告)日：2018-07-12

    申请号：US15913459

    申请日：2018-03-06

    申请人： RFMicron, Inc.

    发明人： Shahriar Rokhsaz

    IPC分类号： G06K7/10 ,  H04B5/00 ,  H03J3/20 ,  G06K19/07

    CPC分类号： G06K7/10366 ,  G06K7/10316 ,  G06K7/10346 ,  G06K19/0716 ,  G06K19/0723 ,  H03J3/20 ,  H03J2200/10 ,  H04B5/0037

    摘要： A method begins by detecting a variance of one or more RF characteristics of a wireless sensor from a desired value of the one or more RF characteristics, due to exposure to an environmental condition. The tuning circuit is operably coupled to an antenna that includes a tail section that is located in a radio frequency (RF) limited area, and a head section that is located in a non-RF limited area. The method continues by adjusting the tuning circuit in response to the detecting of the variance. The method continues by generating a message regarding the adjusting of the tuning circuit, wherein a level of the adjusting of the tuning circuit is representative of the variance of the one or more RF characteristics sensed by the tail section. The method continues by transmitting the message to one or more of an RF reader and a computing device.