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    Fine-grained clock resolution using low and high frequency clock sources in a low-power system
    1.
    发明授权
    Fine-grained clock resolution using low and high frequency clock sources in a low-power system 有权

    公开(公告)号：US10754370B2

    公开(公告)日：2020-08-25

    申请号：US16809466

    申请日：2020-03-04

    申请人： Silicon Laboratories Inc.

    发明人： Partha Sarathy Murali ,  Nagaraj Reddy Anakala

    IPC分类号： G06F1/08 ,  H03B5/20 ,  G06F1/06 ,  H03K3/03 ,  G06F1/14 ,  H03B5/32 ,  H03B5/02

    摘要： A periodic output generator has a first clock source coupled to a first counter and a second clock source with a frequency greater than the first clock source, the second clock source coupled to a second counter, the first clock source operating continuously, the second clock source enabled when the first clock source reaches a count C1. The second clock source generates an output when a count C2 is reached, and the counters are reset and the process repeats. In another example, a timestamp generator has a high speed clock and a real time clock operative on a low speed clock. The timestamp generator receives an external event, turns on the high speed clock generator and counts high speed clock cycles C until the arrival of the next time stamp, and computes an event timestamp as the next timestamp less c/f, less the startup time of the high speed clock.

    Ultra-low power mesh network
    2.
    发明授权
    Ultra-low power mesh network 有权

    公开(公告)号：US11310063B2

    公开(公告)日：2022-04-19

    申请号：US16918342

    申请日：2020-07-01

    申请人： Silicon Laboratories Inc.

    发明人： Partha Sarathy Murali ,  Ajay Mantha ,  Nagaraj Reddy Anakala ,  Subba Reddy Kallam ,  Venkat Mattela

    IPC分类号： H04L12/12 ,  H04W84/12 ,  H04W4/80 ,  H04W84/18

    摘要： A mesh receiver has a wakeup receiver for reception of a wakeup sequence formed by keyed RF or a sequence of wireless packets and gaps, a transmitter forming low speed RF wakeup sequence to other mesh stations, a mesh receiver for reception of high speed WLAN packets, the transmitter sending a wireless ACK packet in response to a wakeup sequence, the mesh receiver thereafter receiving wireless packets from a remote station, the mesh transmitter sending an ACK, the mesh station thereafter identifying a next hop station, and sending a wakeup sequence to that station, after receipt of an ACK, sending the data, the mesh receiver and mesh transmitter thereafter going to sleep.

    Ultra low power mesh network
    3.
    发明授权
    Ultra low power mesh network 有权

    公开(公告)号：US10742429B2

    公开(公告)日：2020-08-11

    申请号：US15811690

    申请日：2017-11-14

    申请人： Silicon Laboratories Inc.

    发明人： Partha Sarathy Murali ,  Ajay Mantha ,  Nagaraj Reddy Anakala ,  Subba Reddy Kallam ,  Venkat Mattela

    IPC分类号： H04L12/12 ,  H04W84/12 ,  H04W4/80 ,  H04W84/18

    摘要： A mesh receiver has a wakeup receiver for reception of a wakeup sequence formed by keyed RF or a sequence of wireless packets and gaps, a transmitter forming low speed RF wakeup sequence to other mesh stations, a mesh receiver for reception of high speed WLAN packets, the transmitter sending a wireless ACK packet in response to a wakeup sequence, the mesh receiver thereafter receiving wireless packets from a remote station, the mesh transmitter sending an ACK, the mesh station thereafter identifying a next hop station, and sending a wakeup sequence to that station, after receipt of an ACK, sending the data, the mesh receiver and mesh transmitter thereafter going to sleep.