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    USING PROXIES TO ENABLE ON-DEVICE MACHINE LEARNING
    21.
    发明申请
    USING PROXIES TO ENABLE ON-DEVICE MACHINE LEARNING 审中-公开

    公开(公告)号：US20180025287A1

    公开(公告)日：2018-01-25

    申请号：US15275355

    申请日：2016-09-24

    Applicant: Apple Inc.

    Inventor： Binu K. Mathew ,  Julia C. Ng ,  Jared L. Zerbe

    IPC: G06N99/00 ,  G06N5/04

    CPC classification number: G06N20/00 ,  G06N5/04

    Abstract: Systems and methods are disclosed for a server generating a plurality of proxy prediction models for each of a plurality of applications for use by client devices. Providing a prediction model based on a data distribution that more closely matches the user private data of the actual user of the client device, as opposed to a generic model, can improve the accuracy of predictions and improve the benefits to the user of the client device. The plurality of prediction models are generated by a server and provided to a plurality of clients. For a particular application, a client device can use previously collected private user data to select one of the plurality of prediction models for the application as being a closest matching prediction model to use for a particular user.

    Downshift Techniques for Oscillator with Feedback Loop
    25.
    发明申请
    Downshift Techniques for Oscillator with Feedback Loop 审中-公开

    公开(公告)号：US20170324417A1

    公开(公告)日：2017-11-09

    申请号：US15146374

    申请日：2016-05-04

    Applicant: Apple Inc.

    Inventor： Brian S. Leibowitz ,  Jared L. Zerbe ,  Sanjay Pant

    IPC: H03L7/099 ,  H03L7/091 ,  H03L7/093 ,  H03L7/18

    CPC classification number: H03L7/093 ,  H03B1/00 ,  H03L7/08 ,  H03L7/085 ,  H03L7/099 ,  H03L2207/06

    Abstract: Techniques are disclosed relating to rapidly downshifting the output frequency of an oscillator. In some embodiments, the oscillator is configured to operate in a closed-loop mode in which negative feedback is used to maintain a particular output frequency (e.g., in a phase-locked loop (PLL)). In some embodiments, the negative feedback loop is configured to maintain the output of the oscillator at a particular frequency based on a reference clock signal and the output of the oscillator. The nature of a negative feedback loop may render rapid frequency changes difficult, e.g., because of corrections by the loop. Therefore, in some embodiments, the loop is configured to switch to an open-loop mode in which a control input to the oscillator is fixed. In some embodiments, the loop switches to open-loop mode in response to a trigger signal and control circuitry forces the oscillator to a new target frequency.

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