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1. 发明授权

US11592069B2 Yaw brake pad and method of producing the same 有权
公开(公告)号：US11592069B2
公开(公告)日：2023-02-28
申请号：US16623710
申请日：2018-04-09
申请人： FORDA ENERGY UK LIMITED , Pengfei Zhang
发明人： Pengfei Zhang
IPC分类号： F16D69/02 , C08L71/00 , B29B9/06 , B29C45/00 , B29K71/00 , B29K307/04 , B29K309/08 , B29K507/04 , B29K509/02 , B29L31/16 , F03D7/02
摘要： Provided are a yaw brake pad and a method of producing the same, which relate to the technical field of friction material. The yaw brake pad is prepared from, by weight, the following main ingredients: 70-75 parts of polyether ether ketone, 10-20 parts of carbon fiber, 3-5 parts of glass fiber and 3-5 of graphite. It alleviates the technical problem that the metal-based friction materials generally for producing current international and domestic yaw brake pads are likely to rust, harmful to dual discs, and produce screechy. It has not only significantly improved mechanical properties and high temperature tolerance, much lower hardness, less wear to dual discs, and lower noise, but also improved friction stability and adaptability to working conditions, and thus can effectively satisfy the demand of the wind driven generator for yaw braking at a low speed.

2. 发明授权

US11261322B2 Yaw brake lining and method of producing the same 有权
公开(公告)号：US11261322B2
公开(公告)日：2022-03-01
申请号：US16623711
申请日：2018-04-09
申请人： FORDA ENERGY UK LIMITED , Pengfei Zhang
发明人： Pengfei Zhang
IPC分类号： C08L67/02
摘要： Provided are a yaw brake lining and a method of producing the same, which relate to the technical field of macromolecular material. The yaw brake lining is mainly prepared from, by weight, the following ingredients: 40-50 parts of polyethylene terephthalate, 5-10 parts of polybutylene terephthalate, 5-10 parts of polytrimethylene terephthalate, 20-30 parts of glass fiber, 1-3 parts of anti-wear agent, 1-5 parts of lubricant, 1-3 parts of antioxidant and 1-3 parts of coupling agent. It achieves the technical effect that the brake disc is protected from damage due to its direct collision with the metal material during braking, and thus effectively guarantees the braking effect of the yaw brake.

3. 发明申请

US20130054363A1 METHOD AND SYSTEM FOR DELIVERING ADVERTISEMENTS IN A STORE 审中-公开
标题翻译：在商店中传送广告的方法和系统
公开(公告)号：US20130054363A1
公开(公告)日：2013-02-28
申请号：US13216258
申请日：2011-08-24
申请人： Sanal Sasankan , Pengfei Zhang
发明人： Sanal Sasankan , Pengfei Zhang
IPC分类号： G06Q30/00
CPC分类号： G06Q30/0259
摘要： A method of delivering promotional content to a navigation application in a mobile device is provided. Knowledge of user interest inferred from a query and expected future location is used to render an advertisement in the navigation application. The advertisement is selected based on a location associated with a query received at the mobile device. In one design, advertisements are selected and rendered in a product-navigation application in a mobile device, which is used to determine the location of a product-choice. The advertisement for a promoted product is preferably rendered such that it represents the actual physical location of the promoted product in the store.
摘要翻译：提供了一种将促销内容递送到移动设备中的导航应用的方法。使用从查询和期望的未来位置推断的用户兴趣的知识来在导航应用中呈现广告。基于与在移动设备处接收到的查询相关联的位置来选择广告。在一种设计中，在用于确定产品选择的位置的移动设备中的产品导航应用中选择和呈现广告。促销产品的广告优选地被渲染成使其表示商店中促销产品的实际物理位置。

4. 发明申请

US20100130149A1 INTEGRATED SQUELCH CIRCUIT WITH PROGRAMMABLE ENGAGEMENT THRESHOLD 有权
标题翻译：具有可编程接合阈值的集成式SQUELCH电路
公开(公告)号：US20100130149A1
公开(公告)日：2010-05-27
申请号：US12330473
申请日：2008-12-08
申请人： Pengfei Zhang , Caogang Yu
发明人： Pengfei Zhang , Caogang Yu
IPC分类号： H04B1/10
CPC分类号： H03G3/344
摘要： A method, system, and apparatus for squelching a signal in telecommunications systems. The apparatus includes a filter, two power detectors, a divider, two comparators, a logic gate, and a gain control block. The apparatus receives an input signal, and the power of the signal is detected. The input signal is also filtered to pass only the noise portion of the signal, and the power of the filtered signal is detected. A ratio between the filtered signal power and the input signal power is determined. A first comparator receives the filtered signal power and a second comparator receives the ratio of the filtered signal power and the input signal power. The logic gate receives the outputs from the first and second comparators. The gain control block receives as inputs the logic gate's output and the input signal to the apparatus. The gain control block may attenuate the input signal based on the logic gate's output. The gain control block generates the output signal of the apparatus.
摘要翻译：一种用于在电信系统中抑制信号的方法，系统和装置。该装置包括滤波器，两个功率检测器，分频器，两个比较器，逻辑门和增益控制块。该装置接收输入信号，并检测信号的功率。输入信号也被滤波以仅通过信号的噪声部分，并且检测滤波信号的功率。确定滤波后的信号功率与输入信号功率之间的比率。第一比较器接收滤波后的信号功率，第二比较器接收滤波后的信号功率与输入信号功率的比值。逻辑门接收来自第一和第二比较器的输出。增益控制块作为输入接收逻辑门的输出和到设备的输入信号。增益控制块可以基于逻辑门的输出衰减输入信号。增益控制块产生装置的输出信号。

5. 发明授权

US06606489B2 Differential to single-ended converter with large output swing 有权
标题翻译：差分到单端转换器，输出摆幅大
公开(公告)号：US06606489B2
公开(公告)日：2003-08-12
申请号：US09784735
申请日：2001-02-14
申请人： Behzad Razavi , Pengfei Zhang
发明人： Behzad Razavi , Pengfei Zhang
IPC分类号： H04B126
CPC分类号： H03F1/226 , H03F3/45381 , H03F2200/294 , H03F2200/372 , H03F2203/45701
摘要： A method and apparatus of converting differential signals to single-ended signals. The method includes receiving a differential signal comprising a first current and a second current and applying the second current to a first load to generate a first voltage. A third current is generated in response to the first voltage. The first current is summed with the third current and applied to a second load to generate the single-ended signal.
摘要翻译：将差分信号转换为单端信号的方法和装置。该方法包括接收包括第一电流和第二电流的差分信号，并将第二电流施加到第一负载以产生第一电压。响应于第一电压产生第三电流。第一个电流与第三个电流相加并施加到第二个负载以产生单端信号。

6. 发明授权

US07450919B1 I/Q mismatch correction using transmitter leakage and gain modulation 有权
标题翻译：使用发射机泄漏和增益调制的I / Q失配校正
公开(公告)号：US07450919B1
公开(公告)日：2008-11-11
申请号：US11349417
申请日：2006-02-07
申请人： Jesse E. Chen , Pengfei Zhang
发明人： Jesse E. Chen , Pengfei Zhang
IPC分类号： H04B1/10
CPC分类号： H04B1/30 , H04B1/525
摘要： A system and method are provided for compensating for an I/Q mismatch of a receiver in a mobile terminal. In general, the receiver and a transmitter of the mobile terminal are formed on a single substrate. A transmit signal is transmitted via the transmitter. Due to leakage through the substrate, the transmit signal is provided to one or more points in the receiver. One of these points is an input of the amplifier circuitry. A gain of the amplifier circuitry is modulated during reception of the transmit signal such that an amplified signal provided by the amplifier circuitry is offset from the carrier frequency of the transmit signal by a known frequency offset. The amplified signal is downconverted to provide a quadrature output signal. Processing circuitry processes frequency components of the quadrature output signal corresponding to the known frequency offset to determine the I/Q mismatch of the receiver.
摘要翻译：提供了一种用于补偿移动终端中接收机的I / Q失配的系统和方法。通常，移动终端的接收机和发射机形成在单个基板上。通过发送器发送发送信号。由于通过衬底的泄漏，发射信号被提供给接收器中的一个或多个点。这些点之一是放大器电路的输入。在接收发射信号期间调制放大器电路的增益，使得由放大器电路提供的放大信号通过已知的频率偏移偏离发射信号的载波频率。放大的信号被下变频以提供正交输出信号。处理电路处理与已知频率偏移相对应的正交输出信号的频率分量，以确定接收机的I / Q失配。

7. 发明授权

US06807406B1 Variable gain mixer circuit 有权
标题翻译：可变增益混频器电路
公开(公告)号：US06807406B1
公开(公告)日：2004-10-19
申请号：US09690937
申请日：2000-10-17
申请人： Behzad Razavi , Pengfei Zhang
发明人： Behzad Razavi , Pengfei Zhang
IPC分类号： H04B126
CPC分类号： H03G1/0088 , H03G3/001 , H03G3/3036
摘要： In accordance with embodiments of the present invention, a receiver system is provided with a variable gain mixer circuit that is advantageous over current architectures used in wireless communication systems. The use of a variable gain mixer circuit simplifies the receiver architecture resulting in the elimination of additional circuit blocks and a reduction in complexity and cost. Moreover, one embodiment of the present invention includes a mixer circuit comprising a mixer core, a bias circuit coupled to the mixer core for providing a bias current, and a variable impedance network. The mixer core receives input signals and generates output currents that are coupled to the variable impedance network. Each of the output currents are selectively coupled to a voltage output node through a variable impedance. Variable gain is established by varying the impedance between the output currents of the mixer core and the voltage output node.
摘要翻译：根据本发明的实施例，接收机系统设置有可变增益混频器电路，其优于无线通信系统中使用的现有架构。使用可变增益混频器电路简化了接收器架构，从而消除了额外的电路块并降低了复杂性和成本。此外，本发明的一个实施例包括混频器电路，该混频器电路包括混频器核心，耦合到用于提供偏置电流的混频器核心的偏置电路以及可变阻抗网络。混频器核心接收输入信号并产生耦合到可变阻抗网络的输出电流。每个输出电流通过可变阻抗选择性地耦合到电压输出节点。通过改变混频器核心的输出电流和电压输出节点之间的阻抗来建立可变增益。

8. 发明授权

US06509777B2 Method and apparatus for reducing DC offset 有权
标题翻译：降低直流偏移的方法和装置
公开(公告)号：US06509777B2
公开(公告)日：2003-01-21
申请号：US09768841
申请日：2001-01-23
申请人： Behzad Razavi , Pengfei Zhang
发明人： Behzad Razavi , Pengfei Zhang
IPC分类号： H03L500
CPC分类号： H03D3/008 , H03F3/45753 , H03F2200/294 , H03F2200/372 , H04B1/30
摘要： Various circuits and methods provide for dc offset reduction that is effective under varying circuit and signal conditions. The offset signal is first sampled and stored, and then subtracted from the signal path via a programmable transconductance amplifier that is placed in a feedback loop during offset reduction. By designing the transconductance amplifier to have programmable gain, the offset reduction technique is capable of compensating for variations in the magnitude of the offset signal. In one embodiment, an amplifier is placed in the feedback path in series with the programmable transconductance amplifier to optimize the trade off between noise and accuracy of offset reduction.
摘要翻译：各种电路和方法提供在变化的电路和信号条件下有效的直流偏移减小。首先对偏移信号进行采样和存储，然后经由可编程跨导放大器从信号路径中减去，该放大器在偏移减小期间放置在反馈环路中。通过将跨导放大器设计为具有可编程增益，偏移降低技术能够补偿偏移信号幅度的变化。在一个实施例中，将放大器放置在与可编程跨导放大器串联的反馈路径中，以优化噪声和偏移减小精度之间的折衷。

9. 发明申请

US20100119055A1 SYSTEMS AND METHODS FOR HALF-DUPLEX SPEAKERPHONES AND OTHER TWO-WAY COMMUNICATION DEVICES 有权
标题翻译：双平面扬声器和其他双向通讯装置的系统和方法
公开(公告)号：US20100119055A1
公开(公告)日：2010-05-13
申请号：US12272298
申请日：2008-11-17
申请人： Pengfei Zhang , Caogang Yu
发明人： Pengfei Zhang , Caogang Yu
IPC分类号： H04M9/08 , H04M1/00
CPC分类号： H04M9/08
摘要： An apparatus to enable half-duplexing capabilities in a two-way communication device is disclosed. The apparatus estimates the signal power and background noise of a first input signal and a second input signal during approximately the same period. The apparatus further provides at least one control signal based on the result of one or more determinations. These determinations may include whether the estimated signal power of at least one of the first and second input signals exceeds a threshold value; whether the estimated signal power of the first input signal exceeds the sum of a first threshold value and the estimated background noise of the first input signal; and whether the estimated signal power of the second input signal exceeds the sum of a second threshold value and the estimated background noise of the second input signal. Other embodiments for use with two-way communication devices and related methods are also disclosed.
摘要翻译：公开了一种在双向通信设备中实现半双工能力的设备。该装置在大约相同的周期期间估计第一输入信号和第二输入信号的信号功率和背景噪声。该装置还基于一个或多个确定的结果进一步提供至少一个控制信号。这些确定可以包括第一和第二输入信号中的至少一个的估计信号功率是否超过阈值; 第一输入信号的估计信号功率是否超过第一阈值和第一输入信号的估计背景噪声之和; 以及第二输入信号的估计信号功率是否超过第二阈值和第二输入信号的估计背景噪声之和。还公开了用于双向通信设备和相关方法的其它实施例。

10. 发明授权

US07496340B1 I/Q mismatch calibration of direct conversion receivers using radio frequency noise 有权
标题翻译：使用射频噪声的直接转换接收机的I / Q失配校准
公开(公告)号：US07496340B1
公开(公告)日：2009-02-24
申请号：US11143042
申请日：2005-06-02
申请人： Jesse E. Chen , Patrick Vandenameele , Steven Thoen , Alex Zenkin , Pengfei Zhang , Peter Hanson , Dmitri Varsanofiev , Peter Cnudde
发明人： Jesse E. Chen , Patrick Vandenameele , Steven Thoen , Alex Zenkin , Pengfei Zhang , Peter Hanson , Dmitri Varsanofiev , Peter Cnudde
IPC分类号： H04B1/10
CPC分类号： H04B1/30
摘要： A system and method are provided for calibrating for an I/Q mismatch of a direct conversion receiver based on a random signal having a two-dimensional I versus Q trajectory, such as radio frequency (RF) noise. In general, the random signal is received and downconverted to a quadrature baseband signal having an in-phase component and a quadrature component. The variance of the in-phase component, the variance of the quadrature component, and the covariance of the in-phase component with the quadrature component are computed based on samples of the quadrature baseband signal. A correction matrix used to compensate for the I/Q mismatch of the receiver and/or I/Q mismatch including a gain mismatch and a phase mismatch of the receiver is then computed based on the variance of the in-phase component, the variance of the quadrature component, and the covariance of the in-phase component with the quadrature component.
摘要翻译：提供了一种系统和方法，用于基于具有二维I对Q轨迹（诸如射频（RF））噪声的随机信号来校准直接转换接收机的I / Q失配。通常，随机信号被接收并下变频到具有同相分量和正交分量的正交基带信号。基于正交基带信号的采样，计算同相分量的方差，正交分量的方差以及同相分量与正交分量的协方差。用于补偿接收机的I / Q失配和/或包括接收机的增益失配和相位失配的I / Q失配的校正矩阵然后基于同相分量的方差，正交分量和同相分量与正交分量的协方差。

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