公开(公告)号：US11894621B2

公开(公告)日：2024-02-06

申请号：US15845369

申请日：2017-12-18

Applicant: Silicon Laboratories Inc.

Inventor： Zoltan Vida ,  Attila L. Zolomy

IPC: H03H7/42 ,  H01P5/10 ,  H01Q5/307 ,  H01Q15/00 ,  H01Q5/50 ,  H01Q5/28 ,  H03H9/00 ,  H03H7/38

CPC classification number: H01Q5/307 ,  H01Q5/28 ,  H01Q5/50 ,  H01Q15/006 ,  H03H7/42 ,  H03D2200/0023 ,  H03H9/0004 ,  H03H2007/386

Abstract: An apparatus includes an RF apparatus, and a multi-band matching balun coupled to the RF apparatus. The multi-band matching balun includes at least one three-element frequency-dependent resonator (TEFDR) and at most three reactive elements.

公开(公告)号：US20230422053A1

公开(公告)日：2023-12-28

申请号：US17897721

申请日：2022-08-29

Applicant: Silicon Laboratories Inc.

Inventor： Thomas Edward Voor ,  Jeffrey L. Sonntag ,  Richard Hendricks

IPC: H04W24/02 ,  H04W24/08

CPC classification number: H04W24/02 ,  H04W24/08

Abstract: In one aspect, a method comprises: monitoring, via at least one computer system of a central entity, performance information of a plurality of wireless devices present in a network environment remotely coupled to the central entity; updating a monitoring database based on monitoring the performance information; and causing at least some of the plurality of wireless devices to be reconfigured from a first mode to a second mode based at least in part on the performance information.

公开(公告)号：US20230421192A1

公开(公告)日：2023-12-28

申请号：US17897652

申请日：2022-08-29

Applicant: Silicon Laboratories Inc.

Inventor： Hendricus De Ruijter ,  Thomas Edward Voor ,  Jeffrey L. Sonntag

IPC: H04B1/16 ,  H04B17/20

CPC classification number: H04B1/16 ,  H04B17/20

Abstract: In one aspect, a method comprises: initializing a front end circuit of a wireless device into a first mode in which a radio frequency (RF) signal processing path comprises a low noise amplifier (LNA) having an output coupled to an RF filter; and in response to an RF signal received in the front end circuit having a level greater than a first threshold, reconfiguring the front end circuit into a second mode in which the RF filter is coupled to an input of the LNA.

公开(公告)号：US11848806B2

公开(公告)日：2023-12-19

申请号：US18162141

申请日：2023-01-31

Applicant: Silicon Laboratories Inc.

Inventor： Frederic Pirot

IPC: H04L27/26 ,  H04B1/713

CPC classification number: H04L27/2607 ,  H04B1/713 ,  H04L27/2605 ,  H04L27/2614 ,  H04L27/2627 ,  H04L27/2628 ,  H04L27/2649 ,  H04L27/2655

Abstract: In one embodiment, an apparatus includes: a radio frequency (RF) front end circuit to receive and downconvert a RF signal to a second frequency signal, the RF signal comprising an orthogonal frequency division multiplexing (OFDM) transmission; a digitizer coupled to the RF front end circuit to digitize the second frequency signal to a digital signal; and a baseband processor coupled to the digitizer to process the digital signal. The baseband circuit comprises a first circuit having a first plurality of correlators having an irregular comb structure, each of the first plurality of correlators associated with a carrier frequency offset and to calculate a first correlation on a first portion of a preamble of the OFDM transmission.

公开(公告)号：US20230371067A1

公开(公告)日：2023-11-16

申请号：US17743042

申请日：2022-05-12

Applicant: Silicon Laboratories Inc.

Inventor： Terry L. Dickey ,  Yan Zhou ,  Wentao Li ,  Rangakrishnan Srinivasan

IPC: H04W74/08 ,  H04W74/04 ,  H04L5/00 ,  H04W4/80 ,  H04W4/23

CPC classification number: H04W74/0808 ,  H04W74/04 ,  H04L5/0053 ,  H04W4/80 ,  H04W4/23

Abstract: A wireless communication device has a receiver to listen to a sequence of channels. A controller responds to a preamble being detected on a first channel while the receiver is tuned to the first channel by causing the receiver to stay on the first channel and decode packet(s) associated with the preamble. The controller responds to detection of a first symbol of a first transmission protocol and the preamble not being detected to cause the receiver to stay on the first channel for a predetermined time waiting for a retry. The controller responds to detection of a second symbol of a second transmission protocol and the preamble not being detected to cause the receiver to switch to an advertising channel of the second transmission protocol. If no preambles, noise, or symbols are detected, the receiver switches to listening to a next channel in the sequence after a fixed time.

公开(公告)号：US11805414B2

公开(公告)日：2023-10-31

申请号：US17704884

申请日：2022-03-25

Applicant: Silicon Laboratories Inc.

Inventor： Jani K. Knaappila

IPC: H04W12/06 ,  H04W12/08 ,  H04W76/14 ,  H04W4/80 ,  G06F21/31 ,  H04W12/50 ,  H04W12/64 ,  H04W4/02

CPC classification number: H04W12/06 ,  G06F21/31 ,  H04W4/80 ,  H04W12/08 ,  H04W12/50 ,  H04W12/64 ,  H04W76/14 ,  G06F2221/2111 ,  H04W4/023

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.

公开(公告)号：US11789708B2

公开(公告)日：2023-10-17

申请号：US17237538

申请日：2021-04-22

Applicant: Silicon Laboratories Inc.

Inventor： Hannu Mallat

IPC: G06F8/40 ,  H03M7/30 ,  G06F8/65

CPC classification number: G06F8/40 ,  G06F8/65 ,  H03M7/3059 ,  H03M7/3088

Abstract: A system and method for creating firmware patch files is disclosed. The method utilizes the Executable Linkable Format file that is created when the firmware image is created. By analyzing the ELF file, the patch creation software is able to identify functions and other data in the new firmware image. The patch creation software then compares these functions to corresponding functions in the old firmware image. The method then creates an edit sequence that may be used to transform the old firmware image into the new firmware image. The edit sequence is then converted into a series of opcodes, where each opcode is followed by at least one parameter. A patch program, disposed on a network device, is able to apply the patch file to update its firmware. This method creates a smaller patch file than other popular tools.

公开(公告)号：US20230318609A1

公开(公告)日：2023-10-05

申请号：US17709642

申请日：2022-03-31

Applicant: Silicon Laboratories Inc.

Inventor： Rangakrishnan Srinivasan ,  Zhongda Wang ,  Francesco Barale ,  Wenhuan Yu ,  Mustafa H. Koroglu ,  Yan Zhou ,  Terry L. Dickey

IPC: H03L7/107 ,  H03L7/099

CPC classification number: H03L7/1075 ,  H04B1/40 ,  H03L7/099

Abstract: A phase-locked loop (PLL) that provides a local oscillator signal for a radio. An oscillator of the PLL supplies an oscillator output signal. Control logic receives a request to change the oscillator output signal to a new frequency and responds to the request by setting a first capacitor circuit of the oscillator to a first capacitance that corresponds to a predetermined frequency of the oscillator output signal. The control logic also responds to the request by setting one or more other capacitor circuits of the oscillator according to temperature and according to a frequency difference between the predetermined frequency and the new frequency. After responding to the request by setting the first capacitor circuit and the one or more other capacitor circuits, the PLL locks to the new frequency using a signal from the PLL loop filter to adjust another capacitor circuit in the oscillator.

公开(公告)号：US20230308111A1

公开(公告)日：2023-09-28

申请号：US17701742

申请日：2022-03-23

Applicant: Silicon Laboratories Inc.

Inventor： John M. Khoury

IPC: H03M3/00 ,  H03F3/183 ,  H04R3/04 ,  H04R3/02

CPC classification number: H03M3/422 ,  H03M3/356 ,  H03M3/458 ,  H03F3/183 ,  H04R3/04 ,  H04R3/02 ,  H03F2200/03

Abstract: In one embodiment, an analog-to-digital converter includes: a sum circuit to receive an analog input signal and a feedback reference signal and generate a sum signal; a feedback circuit coupled to the sum circuit to provide the feedback reference signal to the sum circuit; a filter coupled to the sum circuit to receive the sum signal and generate a filtered signal; and a punctured quantizer coupled to the filter to receive the filtered signal and quantize the filtered signal to a digital output and to output the digital output and to provide the digital output to the feedback circuit.

公开(公告)号：US11770287B2

公开(公告)日：2023-09-26

申请号：US17138846

申请日：2020-12-30

Applicant: Silicon Laboratories Inc.

Inventor： Antonio Torrini ,  Hendricus de Ruijter ,  Yan Zhou ,  David Trager

IPC: H04L27/26 ,  H04L27/00

CPC classification number: H04L27/2657 ,  H04L27/0014 ,  H04L27/2675 ,  H04L2027/0026

Abstract: An apparatus includes a radio-frequency (RF) receiver for receiving an RF signal using a plurality of antennas. The RF receiver includes a demodulator to provide a switch signal to cause the RF receiver to use an antenna in the plurality of antennas. The RF receiver further includes a carrier frequency offset (CFO) correction circuit that uses an estimation of the carrier frequency offset and an estimation of phase differences to remove the carrier frequency offset.