公开(公告)号：US08903023B1

公开(公告)日：2014-12-02

申请号：US13913379

申请日：2013-06-07

申请人： Beken Corporation

发明人： Weifeng Wang ,  Yiming Huang ,  Mingsheng Ao

IPC分类号： H03D3/00 ,  H04L27/14 ,  H04B1/16

CPC分类号： H04L27/142 ,  H04B1/16 ,  H04B1/30

摘要： A Bluetooth receiver comprises a RF front end configured to receive a Bluetooth signal including a preamble and 34-bit pseudo-number (PN); a DC estimator communicatively coupled to the RF front end; and a frame synchronizer communicatively coupled to the DC estimator. The DC estimator is configured to perform DC offset estimation by determining an average value of samples of the preamble and the frame synchronizer is configured to use the 34-bit PN for frame synchronization.

摘要翻译： 蓝牙接收机包括被配置为接收包括前同步码和34位伪号（PN）的蓝牙信号的RF前端; 通信地耦合到RF前端的DC估计器; 以及通信地耦合到DC估计器的帧同步器。 DC估计器被配置为通过确定前导码的采样的平均值来执行DC偏移估计，并且帧同步器被配置为使用用于帧同步的34位PN。

公开(公告)号：US08766685B1

公开(公告)日：2014-07-01

申请号：US13911099

申请日：2013-06-06

申请人： Beken Corporation

发明人： Yunfeng Zhao ,  Ronghui Kong ,  Dawei Guo

IPC分类号： H03L7/06 ,  H03L7/08

CPC分类号： H03L7/104

摘要： A PLL circuit comprises a phase frequency detector (PFD), a charge pump (CP), a low pass filter (LPF), a voltage controlled oscillator (VCO), a frequency divider (FD) and a reset module. The PFD receives a first and a second input signals, and outputs a first and a second adjustment parameters according to phase and frequency difference between the first and the second input signal. The CP is coupled to the PFD, generates a current according to the first and the second adjustment parameters. The LPF is coupled to the CP, and generates a voltage according to the current. The VCO is coupled to the LPF, and generates an oscillation frequency according to the voltage. The FD receives and divides the oscillation frequency, and generates the second input signal. The reset module generates a reset signal to feed to the FD, wherein the reset module receives the first signal.

摘要翻译： PLL电路包括相位频率检测器（PFD），电荷泵（CP），低通滤波器（LPF），压控振荡器（VCO），分频器（FD）和复位模块。 PFD接收第一和第二输入信号，并根据第一和第二输入信号之间的相位和频率差输出第一和第二调整参数。 CP耦合到PFD，根据第一和第二调整参数产生电流。 LPF耦合到CP，并根据电流产生电压。 VCO耦合到LPF，并根据电压产生振荡频率。 FD接收并分频振荡频率，并产生第二输入信号。 复位模块产生复位信号以馈送到FD，其中复位模块接收第一信号。

公开(公告)号：US08508293B2

公开(公告)日：2013-08-13

申请号：US13405632

申请日：2012-02-27

申请人： Jiazhou Liu ,  Dawei Guo ,  Yangeng Wang

发明人： Jiazhou Liu ,  Dawei Guo ,  Yangeng Wang

IPC分类号： H03K9/02

CPC分类号： H04L27/06 ,  H03D1/2272

摘要： An ASK demodulator comprises a rectification circuit which receives and rectifies an ASK signal to generate a rectified current; an active load circuit is coupled to the rectification circuit and receives the rectified current and present an impedance which is inversely proportional to at least a part of the rectified current when a frequency of a base band signal meets a preset condition; a comparator is coupled to the rectification circuit and the active load circuit and receives a reference voltage and a voltage generated based on, at least in part, the rectified current and the impedance, and compares the reference voltage and the generated voltage to generate a demodulated signal.

摘要翻译： ASK解调器包括整流电路，其接收并整流ASK信号以产生整流电流; 有源负载电路耦合到整流电路，并且当基带信号的频率满足预设条件时，接收整流电流并呈现与至少一部分整流电流成反比的阻抗; 比较器耦合到整流电路和有源负载电路，并且接收基准电压和至少部分地基于整流电流和阻抗产生的电压，并且比较参考电压和产生的电压以产生解调的 信号。

公开(公告)号：US08014742B1

公开(公告)日：2011-09-06

申请号：US13092946

申请日：2011-04-24

申请人： Ronghui Kong ,  Dawei Guo

发明人： Ronghui Kong ,  Dawei Guo

IPC分类号： H04B17/00

CPC分类号： H04B17/318 ,  H04B17/21

摘要： This disclosure discloses methods and apparatus for calibrating received signal strength indicators.

摘要翻译： 本公开公开了用于校准接收信号强度指示符的方法和装置。

公开(公告)号：US20240211603A1

公开(公告)日：2024-06-27

申请号：US18171587

申请日：2023-02-20

申请人： Beken Corporation

发明人： Zhifu LIU ,  Zhilei WANG ,  Pujie YANG

IPC分类号： G06F21/57 ,  G06F21/60

CPC分类号： G06F21/575 ,  G06F21/602 ,  G06F2221/034

摘要： A method for resisting fault injection attacks during secure boot is provided. The method may include: performing a secure check on a System-on-Chip (SoC), wherein one or more pre-determined values are written on one or more bits of a first register of the SoC during the secure check; reading one or more corresponding bits of a second register of the SoC; and comparing the values of the one or more bits of the second register with the values of the one or more corresponding bits of the first register. In response to a comparison result that the values of the one or more bits of the second register are the same as the values of the one or more corresponding bits of the first register, the SoC is booted.

公开(公告)号：US12022299B2

公开(公告)日：2024-06-25

申请号：US17647507

申请日：2022-01-10

申请人： Beken Corporation

发明人： Yiming Huang ,  Lianxue Liu ,  Weifeng Wang

IPC分类号： H04W16/14 ,  H04B1/713 ,  H04W72/0453 ,  H04W72/541 ,  H04B1/7136 ,  H04B1/715 ,  H04W4/80 ,  H04W84/12

CPC分类号： H04W16/14 ,  H04B1/713 ,  H04W72/0453 ,  H04W72/541 ,  H04B2001/71362 ,  H04B2001/7154 ,  H04W4/80 ,  H04W84/12

摘要： A Bluetooth receiver includes a memory; and one or more processors in communication with the memory, the one or more processors configured to perform operations including: dividing Bluetooth frequencies of the Bluetooth receiver into Bluetooth frequency classes based on a frequency relationship among Bluetooth channels of the Bluetooth receiver and non-overlapping Wi-Fi channels of an interfering Wi-Fi device operating in a Wi-Fi frequency range within the Bluetooth frequency range, each Bluetooth frequency class including one or more Bluetooth frequency groups; determining one or more working Bluetooth frequency groups of the Bluetooth frequency classes based on pre-determined requirements, and saving entire working Bluetooth frequencies within the one or more working Bluetooth frequency groups into a channel map table, which can be used for Adaptive Frequency Hopping (AFH) to reduce Wi-Fi interferences caused by the Wi-Fi device. The Bluetooth receiver may efficiently and quickly choose working Bluetooth frequency points.

公开(公告)号：US11664846B1

公开(公告)日：2023-05-30

申请号：US17646833

申请日：2022-01-03

申请人： Beken Corporation

发明人： Weifeng Wang ,  Yiming Huang

IPC分类号： H04B1/7143 ,  H04W4/80 ,  H04W72/0453 ,  H04L27/26 ,  H04W72/541 ,  H04W72/542 ,  H04B1/715

CPC分类号： H04B1/7143 ,  H04L27/2657 ,  H04W4/80 ,  H04W72/0453 ,  H04W72/541 ,  H04W72/542 ,  H04B2001/7154

摘要： A Bluetooth receiver includes a primary circuit path, which can create a first digital IF modulated signal to obtain a Bluetooth load signal at a current Bluetooth frequency point, and an auxiliary circuit path, in parallel with the primary circuit path, which can create a second digital IF modulated signal in a Bluetooth frequency range across multiple Bluetooth frequency points. A signal analysis module of the auxiliary circuit path may evaluate interference levels of the second digital IF modulated signal at the Bluetooth frequency points, by analyzing a Fourier Transformation (FT) spectrum of the second digital IF modulated signal, and to choose a number of working Bluetooth frequency points corresponding to relative low signal strengths in the FT spectrum. This way may efficiently and quickly choose qualified working Bluetooth frequency points for Adaptive Frequency Hopping (AFH) in a single current time slot, without consuming any additional time slots for detection.

公开(公告)号：US11297421B2

公开(公告)日：2022-04-05

申请号：US16843522

申请日：2020-04-08

申请人： Beken Corporation

发明人： Desheng Hu ,  Donghui Gao ,  Jiazhou Liu ,  Dawei Guo

IPC分类号： H04R3/00 ,  H03F3/45 ,  H03M1/66

摘要： A bias circuit includes a digital-to-analog converter configured to receive a digital input and output an analog signal; an integrator coupled to a first node that is coupled to the digital-to-analog converter and an amplifier, and coupled to a second node that is coupled to a positive input port of a first comparator and a negative input port of a second comparator; the digital signal processor coupled to an output port of the first comparator and an output port of the second comparator, and coupled to an input port of the digital-to-analog converter.

公开(公告)号：US11218127B2

公开(公告)日：2022-01-04

申请号：US16946100

申请日：2020-06-05

申请人： Beken Corporation

发明人： Donghui Gao ,  Desheng Hu ,  Jiazhou Liu

IPC分类号： H03G7/00 ,  H03F3/45 ,  H03M1/66 ,  H04R3/00

摘要： A power amplifier includes a digital-to-analog converter, a loop filter, a driver circuit, a first adjustable reference resistor and a second adjustable reference resistor. A circuit includes an overcurrent protection circuit and a power amplifier, wherein the overcurrent protection circuit is communicatively coupled to the power amplifier. The digital-to-analog converter is configured to receive a digital signal and to output an analog signal, the driver circuit communicatively coupled to the loop filter and at least one of a first output port and a second output port of the power amplifier.

公开(公告)号：US20210303254A1

公开(公告)日：2021-09-30

申请号：US15929516

申请日：2020-05-06

申请人： Beken Corporation

发明人： Weifeng Wang ,  Lulai Chen

IPC分类号： G06F3/16 ,  H04R3/12

摘要： A wireless speaker system includes a first transceiver and a second transceiver. The first transceiver acting as a master is configured to establish a first wireless link with a data source for receiving a plurality of data packets, and to establish a second wireless link with a second transceiver acting as a slave for transmitting a set of parameters to the second transceiver to enable the second transceiver to sniff the plurality of data packets from the data source via an enabled wireless link. The first transceiver is further configured to monitor the values of a first communication quality of the first wireless link and a second communication quality of the enabled wireless link, and to switch roles between the first transceiver and the second transceiver when the first communication quality is less than the second communication quality and the first communication quality decreases to a pre-determined threshold value.