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.

公开(公告)号：US11764749B2

公开(公告)日：2023-09-19

申请号：US16724160

申请日：2019-12-20

Applicant: Silicon Laboratories Inc.

Inventor： Attila Zolomy ,  Pasi Rahikkala ,  Tuomas Hänninen

IPC: H01Q7/00 ,  H03H7/38 ,  H04B1/04 ,  H04B1/18

CPC classification number: H03H7/383 ,  H01Q7/005 ,  H04B1/0458 ,  H04B1/18

Abstract: An apparatus includes a module. The module includes a radio frequency (RF) circuit to transmit or receive RF signals, and a loop antenna to transmit or receive the RF signals. The module further comprises an impedance matching circuit coupled to the RF circuit and to the loop antenna. The impedance matching circuit comprises lumped reactive components.

公开(公告)号：US11757188B2

公开(公告)日：2023-09-12

申请号：US17705247

申请日：2022-03-25

Applicant: Silicon Laboratories Inc.

Inventor： Attila Zolomy ,  Pasi Rahikkala ,  Thomas E. Voor

IPC: H01Q1/50 ,  H01Q7/00 ,  H01Q9/14 ,  H01Q1/22 ,  H01Q23/00

CPC classification number: H01Q7/00 ,  H01Q1/2225 ,  H01Q1/50 ,  H01Q9/14 ,  H01Q23/00

Abstract: An apparatus includes a radio frequency (RF) circuit to transmit or receive RF signals. The apparatus further includes a loop antenna to transmit or receive the RF signals. The apparatus further includes an impedance matching circuit coupled to the RF circuit and to the loop antenna. The impedance matching circuit includes lumped reactive components.

公开(公告)号：US11750360B2

公开(公告)日：2023-09-05

申请号：US15868855

申请日：2018-01-11

Applicant: Silicon Laboratories Inc.

Inventor： Hendricus de Ruijter ,  Wentao Li ,  Lauri Mikael Hintsala

IPC: H04L7/04 ,  H04J3/06 ,  H04W52/02 ,  H04L69/22 ,  H04W4/80

CPC classification number: H04L7/042 ,  H04J3/0658 ,  H04L69/22 ,  H04W52/0229 ,  H04W4/80 ,  Y02D30/70

Abstract: An apparatus includes a radio frequency (RF) receiver to receive packets. The RF receiver includes first and second synchronization field detectors (SFDs). The first and second SFDs detect synchronization headers generated using first and second physical layer (PHY) modes, respectively.

公开(公告)号：US11750167B2

公开(公告)日：2023-09-05

申请号：US15823319

申请日：2017-11-27

Applicant: Silicon Laboratories Inc.

Inventor： Attila Zolomy ,  Christopher L. McCrank

IPC: H03H7/40 ,  H04B1/18 ,  H03H7/38 ,  H04B1/00 ,  H03F3/19 ,  H03F3/24 ,  H03F1/56 ,  H03F3/45

CPC classification number: H03H7/40 ,  H03F1/565 ,  H03F3/19 ,  H03F3/245 ,  H03F3/45475 ,  H03H7/38 ,  H04B1/18 ,  H03F2200/294 ,  H03F2200/451 ,  H03F2203/45731 ,  H03H2007/386 ,  H04B1/0092

Abstract: A radio-frequency (RF) apparatus includes a wideband receive (RX) impedance matching circuit to provide a received differential RF signal to RF receive circuitry. The wideband RX impedance matching circuit includes first and second inductors to receive the differential RF signal. The wideband RX impedance matching circuit further includes a third inductor coupled across an input o the RF receive circuitry. The third inductor performs the functionality of a capacitor having a negative capacitance value.