公开(公告)号：US20150126128A1

公开(公告)日：2015-05-07

申请号：US14575391

申请日：2014-12-18

Applicant: Silicon Laboratories Inc.

Inventor： John B. Youngblood ,  Guner Arslan ,  J.A. Bolton ,  Trenton J. Grale ,  Vitor Pereira ,  Jeffrey A. Tindle ,  David S. Trager ,  Yan Zhou

IPC: H04B15/00

CPC classification number: H04B15/00

Abstract: Die-to-die communication links for receiver integrated circuit dies within multi-die systems and related methods are disclosed for radio frequency (RF) receivers. The disclosed embodiments provide die-to-die communication links that allow for direct communication of operating parameters between receiver integrated circuit dies and other integrated circuit dies within a multi-die system so that the operation of receive path circuitry can be adjusted without requiring intervention from an external host processor integrated circuit. A variety of operating parameter information can be communicated through the die-to-die communication links so that the integrated circuit dies can quickly adjust to changing signal conditions without requiring intervention by the external host processor integrated circuit.

Abstract translation: 针对射频（RF）接收机公开了用于多芯片系统内的接收机集成电路管芯的模 - 模通信链路和相关方法。 所公开的实施例提供了允许在多管芯系统内的接收器集成电路管芯与其他集成电路管芯之间的操作参数的直接通信的管芯到管芯通信链路，使得可以调整接收路径电路的操作，而无需干预 外部主机处理器集成电路。 可以通过管芯到管芯通信链路传送各种操作参数信息，使得集成电路管芯可以快速地适应不断变化的信号条件，而不需要外部主机处理器集成电路的干预。

公开(公告)号：US20140049256A1

公开(公告)日：2014-02-20

申请号：US13729516

申请日：2012-12-28

Applicant: Silicon Laboratories Inc.

Inventor： Eric B. Smith ,  Riad Wahby ,  Yan Zhou

IPC: G01R33/028 ,  B81B3/00

CPC classification number: G01R33/0286 ,  B81B3/0032

Abstract: A method includes supplying a current to at least one conductive path integral with a MEMS device to thereby exert a Lorentz force on the MEMS device in the presence of a magnetic field. The method includes determining the magnetic field based on a control value in a control loop configured to maintain a constrained range of motion of the MEMS device. The control loop may be configured to maintain the MEMS device in a stationary position. The current may have a frequency equal to a resonant frequency of the MEMS device.

Abstract translation: 一种方法包括将电流提供给与MEMS器件集成的至少一个导电路径，从而在存在磁场的情况下在MEMS器件上施加洛伦兹力。 该方法包括基于被配置为保持MEMS器件的受限的运动范围的控制回路中的控制值来确定磁场。 控制回路可以被配置为将MEMS器件保持在静止位置。 电流可以具有等于MEMS器件的谐振频率的频率。

公开(公告)号：US20250088901A1

公开(公告)日：2025-03-13

申请号：US18243222

申请日：2023-09-07

Applicant: Silicon Laboratories Inc.

Inventor： Xushuai Qu ,  Guner Arslan ,  Robert Gorday ,  Yan Zhou ,  Yi Shen Yeh

IPC: H04W28/04 ,  H04L7/033

Abstract: A technique for reducing or eliminating effects of frequency and phase offset in a communications system includes implementing a demodulator having a Kalman filter based phase-locked loop for phase-shift keying or quadrature amplitude modulated signals. In an acquisition mode of operation, the Kalman filter based phase-locked loop continuously updates an error correction signal until an error between a received version of a predetermined signal transmitted using phase-shift keying or quadrature amplitude modulation and the predetermined signal is at or near zero. In a tracking mode of operation, the Kalman filter based phase-locked loop adjusts the error correction signal to maintain the error between the received signal and a predicted signal at or near zero.

公开(公告)号：US12219599B2

公开(公告)日：2025-02-04

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: H04L12/66 ,  H04L5/00 ,  H04M3/00 ,  H04M5/00 ,  H04W4/23 ,  H04W4/80 ,  H04W74/04 ,  H04W74/0808

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：US20240421770A1

公开(公告)日：2024-12-19

申请号：US18337278

申请日：2023-06-19

Applicant: Silicon Laboratories Inc.

Inventor： Mustafa Koroglu ,  John Khoury ,  Yan Zhou ,  Ajmal Vadakkan Kayyil ,  Vitor Pereira

IPC: H03F1/02 ,  H03B5/12 ,  H03F3/45 ,  H04W52/02

Abstract: In one embodiment, an apparatus includes: a wake-up radio to issue a trigger signal in response to detection of a wake-up message in a radio frequency (RF) signal; and a second radio coupled to the wake-up radio, the second radio to wake up in response to receipt of the trigger signal. The wake-up radio may be coupled to the second radio without substantial loading, and may be configured with stacked circuits to reuse currents.

公开(公告)号：US12088335B2

公开(公告)日：2024-09-10

申请号：US18073028

申请日：2022-12-01

Applicant: Silicon Laboratories Inc.

Inventor： Qiang Li ,  Yan Zhou

IPC: H04B1/7103

CPC classification number: H04B1/7103

Abstract: Techniques for quickly and accurately determining whether a channel is being used for transmission of data using one of a plurality of communications protocols for low power signals using random data of a packet are disclosed. The techniques increase sensitivity and reduce the false alarm rate for a wide range of signal and noise levels. A noise detection technique uses an adaptive window size for fast noise detection that increases the rate of scanning channels during a signal identification period. In a BLE1M detection mode, detection of clusters of zero frequency deviation are used to reduce the false detection rate. Adaptive Zigbee symbol detection improves detection sensitivity beyond −97 dBm. The techniques use a chip-based differential to generate frequency deviation samples for Zigbee detection or data filtering frequency deviation samples generated using sample-based differentials based on an oversampled received signal to improve the signal-to-noise ratio.

公开(公告)号：US11973509B2

公开(公告)日：2024-04-30

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 ,  H04B1/40

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

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：US11784671B2

公开(公告)日：2023-10-10

申请号：US17138836

申请日：2020-12-30

Applicant: Silicon Laboratories Inc.

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

IPC: H04B1/16 ,  H04B1/10 ,  H04L27/26

CPC classification number: H04B1/16 ,  H04B1/10

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 estimates and removes a carrier frequency offset.

公开(公告)号：US11743852B2

公开(公告)日：2023-08-29

申请号：US17107281

申请日：2020-11-30

Applicant: Silicon Laboratories Inc.

Inventor： John M. Khoury ,  Yan Zhou ,  Michael A. Wu

IPC: H04W56/00 ,  H04W4/02

CPC classification number: H04W56/0035 ,  H04W56/005 ,  H04W4/023

Abstract: In at least one embodiment, a method for measuring a distance between a first communications device including a first local oscillator and a second communications device including a second local oscillator includes unwrapping N phase values to generate N unwrapped phase values. N is an integer greater than one. Each of the N phase values indicate an instantaneous phase of a received signal. The method includes averaging the N unwrapped phase values to generate an average phase value. The method includes wrapping the average phase value to generate a final phase measurement of the first local oscillator with respect to the second local oscillator.

公开(公告)号：US20220312271A1

公开(公告)日：2022-09-29

申请号：US17840107

申请日：2022-06-14

Applicant: Silicon Laboratories Inc.

Inventor： Guner Arslan ,  Yan Zhou ,  He Gou

IPC: H04W28/14 ,  H04W4/80 ,  H04L1/16 ,  H04W72/14 ,  H04W72/12

Abstract: A system and method for detecting the presence of a Bluetooth or Zigbee signal within a short period of time is disclosed. The signal identification circuit has two stages, a first stage that processes windows to determine whether noise is present, and a second stage that processes long windows to determine whether the signal is a particular lower-power network protocol. The signal identification circuit can be configured to detect Bluetooth at 1 Mbps, Bluetooth at 2 Mbps or Zigbee. The signal identification signal may be used to allow a lower-power network controller to coexist with a high duty cycle WiFi controller. The signal identification circuit may also be used for other functions, such as powering on a lower-power network controller, determining CCA, or determining which channel a packet is being transmitted on.