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公开(公告)号：US10542585B2
公开(公告)日：2020-01-21
申请号：US15716966
申请日：2017-09-27
Applicant: Silicon Laboratories Inc.
Inventor： DeWitt Clinton Seward , Preston Fick , Clay Daigle , Greg Hodgson , Lee Byrd
Abstract: A system and method for allowing legacy devices to be discovered on a DotDot network is disclosed. The system includes a gateway device to interface between DotDot devices and legacy devices. In some embodiments, the gateway device has a plurality of network interfaces to communicate with these legacy devices. The gateway device discovers the legacy devices that it can communicate with. The gateway device then presents information about these legacy devices in a Resource Directory. In some embodiments, the Resource Directory is maintained within the gateway device. In other embodiments, the gateway device utilizes a Resource Directory that exists on the DotDot network.
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公开(公告)号：US10511315B1
公开(公告)日：2019-12-17
申请号：US16138080
申请日：2018-09-21
Applicant: Silicon Laboratories Inc.
Inventor： Vivek Sarda
Abstract: An apparatus includes a control circuit configured to generate a frequency divider control signal approximating a fractional divide ratio. The apparatus includes a frequency divider configured to generate an output clock signal based on an input clock signal and an adjusted frequency divider control signal. The output clock signal is a frequency-divided version of the input clock signal. The apparatus includes a measurement circuit configured to provide digital time information corresponding to an edge of the output clock signal. The apparatus includes an adaptive adjustment circuit configured to generate the adjusted frequency divider control signal based on the frequency divider control signal and the digital time information.
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143.发明授权公开(公告)号：US10469112B2
公开(公告)日：2019-11-05
申请号：US15609337
申请日：2017-05-31
Applicant: Silicon Laboratories Inc.
Inventor： Abdulkerim L. Coban
Abstract: In one example, a method includes: at a beginning of a packet communication, setting a maximum gain setting for a plurality of gain components of a receiver; and during a preamble portion of the packet communication, reducing a gain setting for one or more of the plurality of gain components in response to at least one of a first signal output by a first component of the receiver being greater than a first threshold and a second signal output by a second component of the receiver being greater than a second threshold.
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公开(公告)号：US10468983B2
公开(公告)日：2019-11-05
申请号：US14933285
申请日：2015-11-05
Applicant: SILICON LABORATORIES INC.
Inventor： Mohamed Mostafa Elsayed , Kenneth W. Fernald , Matthew Powell
Abstract: An apparatus includes a slew rate regulation circuit, a plurality of switches and a controller circuit. The controller circuit controls the plurality of switches to decouple a first source supply voltage from a supply rail; control the plurality of switches to couple a second source supply voltage to the supply rail to replace the first source supply voltage with the second source supply voltage; and control the slew rate regulation circuit to regulate a slew rate of a voltage of the supply rail during a time interval in which the first source supply voltage is being replaced with the second source supply voltage.
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公开(公告)号：US10461964B1
公开(公告)日：2019-10-29
申请号：US16169757
申请日：2018-10-24
Applicant: Silicon Laboratories Inc.
Inventor： Alexander Cherkassky , Bruce P. Del Signore
IPC: H04L25/02
Abstract: A driver circuit includes two pull-up portions coupled respectively between VDD and first and second driver output nodes and two pull-down sections coupled respectively between ground and third and fourth driver output nodes. The driver circuit is configurable as an RS485 driver or a CAN driver. The active diodes in the pull-up sections are turned off when necessary to prevent unwanted reverse currents between the first and second output nodes and VDD. The active diodes in the pull-down sections are turned off when necessary to prevent unwanted reverse current between ground and the third and fourth output nodes.
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Patent Agency Ranking
公开(公告)号：US10461701B2
公开(公告)日：2019-10-29
申请号：US15875274
申请日：2018-01-19
Applicant: Silicon Laboratories Inc.
Inventor： Sherry X. Wu , Sriharsha Vasadi , Mustafa H. Koroglu , Rangakrishnan Srinivasan
Abstract: In one form, a signal generator system such as a power amplifier system includes an amplification stage, a lowpass filter, and a controller. The amplification stage includes a first amplifier having an input for receiving an input signal, a control input for receiving a first control signal, and an output. The lowpass filter has a first input coupled to the output of the first amplifier, and an output. The controller has a first input coupled to the output of the lowpass filter, and a first output coupled to the control input of the first amplifier, wherein the controller varies the first control signal to reduce a difference between the output of the lowpass filter and a first target voltage level.
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公开(公告)号：US10440570B2
公开(公告)日：2019-10-08
申请号：US15387004
申请日：2016-12-21
Applicant: Silicon Laboratories Inc.
Inventor： Jani K. Knaappila
Abstract: Systems and methods are provided that may be implemented to use angle of arrival (AoA) of a signal transmitted between two Bluetooth Low Energy (BLE) wireless devices to initially authenticate a connection between the two BLE devices. In one example, bonding or pairing with a first BLE device may be restricted to only those other BLE devices having an antenna currently positioned to transmit a signal to the first BLE device from an allowed direction and within a predefined permitted range of AoA relative to the first BLE device.
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公开(公告)号：US10404209B2
公开(公告)日：2019-09-03
申请号：US15259897
申请日：2016-09-08
Applicant: Silicon Laboratories Inc.
Inventor： Joseph D. Cali , Rajesh Thirugnanam , Rahul Shukla , Srisai R. Seethamraju
Abstract: A temperature compensated crystal oscillator (TCXO) includes a crystal oscillator and a temperature sensor to provide a sensed temperature. A delay circuit has a selectable delay to delay the frequency compensation based on the sensed temperature. The delay compensates for a difference between when the temperature sensor reflects a change in temperature and when a frequency of a signal supplied by the crystal oscillator is affected by the change in temperature. The delay may be static or dynamic with respect to the current temperature sensed by the temperature sensor.
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公开(公告)号：US10360104B2
公开(公告)日：2019-07-23
申请号：US15589217
申请日：2017-05-08
Applicant: Silicon Laboratories Inc.
Inventor： Thomas S. David
Abstract: A system and method of utilizing ECC memory to detect software errors and malicious activities is disclosed. In one embodiment, after a pool of memory is freed, every data word in that pool is modified to ensure that an ECC error will occur if any data word in that pool is read again. In another embodiment, the ECC memory controller is used to detect and prevent non-secure applications from accessing secure portions of memory.
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150.发明授权公开(公告)号：US10340894B1
公开(公告)日：2019-07-02
申请号：US15963316
申请日：2018-04-26
Applicant: SILICON LABORATORIES INC.
Inventor： Thomas S. David , Wasim Quddus
IPC: H03K3/012 , H03K3/3562 , H03K17/24 , H03K3/289
Abstract: A state retention circuit for retaining the state of a data storage element during a power reduction mode including a storage latch and a retention latch both powered by retention supply voltage that remains energized during a power reduction mode. The storage latch and the retention latch are both coupled to a retention node that is toggled from between first and second states before entering the power reduction mode so that the storage latch latches the state of the data storage element. The retention latch includes a retention transistor and a retention inverter powered by the retention supply voltage. The retention transistor is overpowered when the retention node is pulled to the second state in which the retention inverter quickly turns off the retention transistor. When the retention node is toggled back to the first state, the retention inverter keeps the retention transistor turned on during the power reduction mode.
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