专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

WO2012107286A1 COMPLEX INTERMEDIATE FREQUENCY BASED RECEIVER ARCHITECTURE 审中-公开
标题翻译：基于复杂中频的接收机架构
公开(公告)号：WO2012107286A1
公开(公告)日：2012-08-16
申请号：PCT/EP2012/051108
申请日：2012-01-25
申请人： Telefonaktiebolaget L M Ericsson (publ) , WILHELMSSON, Leif , SUNDSTRÖM, Lars , FENGHAO, Mu
发明人： WILHELMSSON, Leif , SUNDSTRÖM, Lars , FENGHAO, Mu
IPC分类号： H03D7/18
CPC分类号： H04W36/30 , H03D7/18 , H03D2200/0045 , H04B17/327 , H04B17/336
摘要： The disclosure relates to a Complex Intermediate Frequency (CIF)-based receiver adapted to process a received signal comprising a signal component at a desired frequency and a signal component as an image frequency. The CIF-based receiver determines the power of the received signal by calibrating the receiver to minimize the power of the signal component at the image frequency that interferes with the signal component at the desired frequency, introduces signal leakage from the image frequency to intentionally degrade the quality of the signal component at the desired frequency, and determines the power of the signal component at the image frequency based on the amount of degradation.
摘要翻译：本公开涉及一种适用于处理包含期望频率的信号分量和信号分量的接收信号作为图像频率的基于复数中频（CIF）的接收机。基于CIF的接收机通过校准接收机来确定接收信号的功率，以使图像频率处的信号分量的功率最小化，从而影响在期望频率处的信号分量，从而引起来自图像频率的信号泄漏以故意降级以期望频率的信号分量的质量，并且基于退化量确定图像频率处的信号分量的功率。

2. 发明授权

US08983471B2 Complex intermediate frequency based receiver architecture 有权
标题翻译：基于复杂中频接收机架构
公开(公告)号：US08983471B2
公开(公告)日：2015-03-17
申请号：US13983566
申请日：2012-01-25
申请人： Leif Wilhelmsson , Lars Sundstrom , Fenghao Mu
发明人： Leif Wilhelmsson , Lars Sundstrom , Fenghao Mu
IPC分类号： H04W36/30 , H03D7/18 , H04B17/00
CPC分类号： H04W36/30 , H03D7/18 , H03D2200/0045 , H04B17/327 , H04B17/336
摘要： The disclosure relates to a Complex Intermediate Frequency (CIF)-based receiver adapted to process a received signal comprising a signal component at a desired frequency and a signal component as an image frequency. The CIF-based receiver determines the power of the received signal by calibrating the receiver to minimize the power of the signal component at the image frequency that interferes with the signal component at the desired frequency, introduces signal leakage from the image frequency to intentionally degrade the quality of the signal component at the desired frequency, and determines the power of the signal component at the image frequency based on the amount of degradation.
摘要翻译：本公开涉及一种适用于处理包含期望频率的信号分量和信号分量的接收信号作为图像频率的基于复数中频（CIF）的接收机。基于CIF的接收机通过校准接收机来确定接收信号的功率，以使图像频率处的信号分量的功率最小化，以在期望的频率处干扰信号分量，引入来自图像频率的信号泄漏以故意降级以期望频率的信号分量的质量，并且基于退化量确定图像频率处的信号分量的功率。

3. 发明授权

US08792581B2 RF clock generator with spurious tone cancellation 有权
标题翻译： RF时钟发生器，具有杂音消除
公开(公告)号：US08792581B2
公开(公告)日：2014-07-29
申请号：US12708345
申请日：2010-02-18
申请人： Fenghao Mu , Henrik Sjöland
发明人： Fenghao Mu , Henrik Sjöland
IPC分类号： H03K9/00 , H04L25/49
CPC分类号： H03B28/00 , H03F1/3247
摘要： A clock generator circuit may generate a target clock signal and may include a pattern generator to generate a pre-distorted version of a modulation signal from patterns stored by the pattern generator. An up-converter may up-convert the pre-distorted version of the modulation signal and a radio frequency lock oscillator signal to obtain an RF clock signal having a desired frequency tone. A tone detection circuit may receive the RF clock signal and detect a presence of unwanted tones. A controller may write the patterns corresponding to the pre-distorted version of the modulation signal to the pattern generator based on the detected unwanted tones in the RF clock signal.
摘要翻译：时钟发生器电路可以产生目标时钟信号，并且可以包括模式发生器，以从图案发生器存储的模式产生调制信号的预失真版本。上变频器可以上变频调制信号的预失真版本和射频锁定振荡器信号，以获得具有期望频率音调的RF时钟信号。音调检测电路可以接收RF时钟信号并检测不需要的音调的存在。控制器可以基于RF时钟信号中检测到的不需要的音调将与调制信号的预失真版本对应的模式写入模式发生器。

4. 发明申请

US20130183921A1 Complex Intermediate Frequency Mixer Stage and Calibration Thereof 有权
标题翻译：复杂的中频混频器及其校准
公开(公告)号：US20130183921A1
公开(公告)日：2013-07-18
申请号：US13823785
申请日：2011-09-16
申请人： Fenghao Mu , Lars Sundström , Leif Wilhelmsson
发明人： Fenghao Mu , Lars Sundström , Leif Wilhelmsson
IPC分类号： H04B1/06
CPC分类号： H04B1/06 , H03D7/166 , H03D7/18
摘要： The invention relates to a complex intermediate frequency (CIF) mixer stage, methods of operation thereof, and methods of calibration thereof. The CIF mixer stage comprises numerous individual mixers driven by IF clock signals to down-convert received IF signals into a set of signals at baseband frequency which are further combined to form a lower side band signal and an upper side band signal. The IF clock signals used have a predefined phase relationship among them, which involves tunable phase skews. By calibration of the conversion gains and the phases of the IF clock signals the gain and phase imbalance introduced in a preceding radio frequency mixer stage and/or the CIF mixer stage can be cancelled. Further, in-channel IQ leakage control can be applied to the lower side band signal and/or the upper side band signal. The CIF mixer stage can thus effectively suppress image interference and IQ leakage.
摘要翻译：本发明涉及复杂中频（CIF）混频器级，其操作方法及其校准方法。 CIF混频器级包括由IF时钟信号驱动的多个单独的混频器，以将接收到的IF信号降频转换成基带频率的一组信号，这些信号进一步组合以形成下边带信号和上边带信号。所使用的IF时钟信号之间具有预定的相位关系，这涉及可调节的相位偏差。通过校准转换增益和IF时钟信号的相位，可以取消在前一个射频混频器级和/或CIF混频器级中引入的增益和相位不平衡。此外，信道内IQ泄漏控制可以应用于下边带信号和/或上边带信号。因此，CIF混频器级可以有效地抑制图像干扰和IQ泄漏。

5. 发明授权

US08204467B2 Passive mixer mismatch tuning using self-tests to suppress IM2 有权
标题翻译：无源混频器不匹配调谐采用自检来抑制IM2
公开(公告)号：US08204467B2
公开(公告)日：2012-06-19
申请号：US12368785
申请日：2009-02-10
申请人： Fredrik Tillman , Fenghao Mu
发明人： Fredrik Tillman , Fenghao Mu
IPC分类号： H04B1/26
CPC分类号： H04B1/30 , H03D7/18 , H03D2200/0086
摘要： The second-order inter-modulation distortion, originating in a differential passive mixer core from imbalance between devices, is reduced by compensating for the mismatch or load, by means of tuning the differential output impedance at the mixer core, or the input impedance of a filter coupled to the output of the passive mixer. Compensating for the imbalance allows greater suppression of even-order harmonics in the differential structure, which reduces second-order intermodulation at the output of the mixers. The compensation is achieved by tunable resistive elements that are calibrated by a built-in self-test architecture. The calibration circuit is deactivated during receiver operation.
摘要翻译：通过调整混频器核心的差分输出阻抗或调制器的输入阻抗，通过补偿失配或负载来减少源自器件之间不平衡的差分无源混频器核心的二阶互调失真滤波器耦合到无源混频器的输出。补偿不平衡允许更大的抑制差分结构中的偶次谐波，这减少了混频器输出端的二阶互调。补偿通过可调电阻元件实现，该电阻元件由内置的自检架构校准。在接收机操作期间，校准电路被禁用。

6. 发明授权

US07714759B1 Low power linear interpolation digital-to-analog conversion 有权
标题翻译：低功耗线性插值数模转换
公开(公告)号：US07714759B1
公开(公告)日：2010-05-11
申请号：US12254441
申请日：2008-10-20
申请人： Fenghao Mu
发明人： Fenghao Mu
IPC分类号： H03M1/78
CPC分类号： H04L27/206 , H03M1/661 , H03M1/785 , H03M1/808
摘要： A resistor network digital-to-analog converter (DAC) subdivides each sampling clock cycle of the DAC into a number of phases. For at least one bit input of the DAC associated with a desired input resistor weight, the input bit value is sampled at each phase. Each of those sampled values is then applied to a respective resistor branch, the parallel set of resistor branches forming the parallel equivalent of the desired input resistor weight for that bit input. Such application may be, for example, via a slew-rate controlled driver, to smooth transient edges in the generated analog output signal. The resulting analog signal experiences reduced reconstruction errors at a higher frequency while consuming less power than a comparable oversampling DAC. Shifting reconstruction errors to higher frequencies relaxes downstream filtering requirements, which simplifies analog signal filtering and allows, for example, the use of current-mode low pass filters.
摘要翻译：电阻网络数/模转换器（DAC）将DAC的每个采样时钟周期细分为多个阶段。对于与期望的输入电阻器加权相关联的DAC的至少一个位输入，在每个相位处对输入比特值进行采样。然后将这些采样值中的每一个施加到相应的电阻器分支，并联的电阻器分支组合形成用于该位输入的期望输入电阻器重量的并行等效值。这种应用可以是例如经由转换速率控制的驱动器，以平滑所产生的模拟输出信号中的瞬态边沿。所产生的模拟信号在较高频率下经历减少的重建误差，同时消耗比可比较的过采样DAC更少的功率。将重建误差转移到较高频率可以放松下游滤波要求，这简化了模拟信号滤波，并允许使用电流模式低通滤波器。

7. 发明申请

US20100066442A1 Method and Apparatus for Tunable Current-Mode Filtering 审中-公开
标题翻译：用于可调谐电流模式滤波的方法和装置
公开(公告)号：US20100066442A1
公开(公告)日：2010-03-18
申请号：US12210483
申请日：2008-09-15
申请人： Fenghao Mu
发明人： Fenghao Mu
IPC分类号： H03K5/00
CPC分类号： H03H11/1291
摘要： According to the teachings presented herein, a tunable current-mode filter is implemented using two or more tunable filter stages in cascade connection. For example, a number of tunable filter stages corresponding to a desired filter order are included in the filter in cascade connection. Use of the current-mode filter simplifies circuit design, particularly in communication transmitter applications, and avoids current-to-voltage conversions needed when voltage-mode filters are used in current-mode signal processing chains. A method and circuit to tune and calibrate the frequency response of the filter are disclosed as well.
摘要翻译：根据本文提出的教导，可调谐电流模式滤波器使用级联连接中的两个或多个可调滤波器级来实现。例如，对应于期望的滤波器顺序的多个可调滤波器级包括在级联中的滤波器中。电流模式滤波器的使用简化了电路设计，特别是在通信发射机应用中，避免了在电流模式信号处理链中使用电压模式滤波器时所需的电流 - 电压转换。还公开了调谐和校准滤波器的频率响应的方法和电路。

8. 发明申请

US20080297259A1 Configurable, Variable Gain LNA for Multi-Band RF Receiver 有权
标题翻译：可配置，可变增益LNA多频RF接收机
公开(公告)号：US20080297259A1
公开(公告)日：2008-12-04
申请号：US11754696
申请日：2007-05-29
申请人： Fenghao Mu
发明人： Fenghao Mu
IPC分类号： H03F3/04
CPC分类号： H03F1/26 , H03F1/223 , H03F1/30 , H03F1/52 , H03F1/56 , H03F3/191 , H03F3/72 , H03F2200/111 , H03F2200/222 , H03F2200/372 , H03F2200/429 , H03F2200/447 , H03F2200/456 , H03F2200/489 , H03F2200/492 , H03F2203/7206 , H03F2203/7209 , H03G1/0088 , H03G3/3036 , H03G3/3052
摘要： A configurable LNA architecture for a multi-band RF receiver front end comprises a bank of LNAs, each optimized to a different frequency band, wherein each LNA has a configurable topology. Each LNA comprises a plurality of amplifier stages, each stage including an RF transistor having a different width. The transistor widths in adjacent amplifier stages may be binary weighted, or may be sized to achieve a constant gain step. By selectively enabling and disabling RF transistors, the effective transistor width of the LNA can be controlled with a fine granularity. A DAC generates a bias voltage with a small quantization step, additionally providing a fine granularity of gain control. The LNAs are protected by overvoltage protection circuits which shield transistors from a supply voltage in excess of their breakdown voltage. A source degeneration inductor presents a real resistance at inputs of the LNAs, without introducing thermal noise.
摘要翻译：用于多频带RF接收器前端的可配置LNA架构包括一组LNA，每组优化为不同的频带，其中每个LNA具有可配置的拓扑。每个LNA包括多个放大器级，每个级包括具有不同宽度的RF晶体管。相邻放大器级中的晶体管宽度可以是二进制加权的，或者可以被设计成实现恒定的增益步长。通过选择性地启用和禁用RF晶体管，可以以细粒度控制LNA的有效晶体管宽度。 DAC产生具有小量化步长的偏置电压，另外提供细微的增益控制粒度。 LNA由过电压保护电路保护，该电路将晶体管屏蔽超过其击穿电压的电源电压。源退化电感器在LNA的输入端呈现实际电阻，而不引入热噪声。

9. 发明授权

US09548155B2 Transformer filter arrangement 有权
标题翻译：变压器过滤装置
公开(公告)号：US09548155B2
公开(公告)日：2017-01-17
申请号：US14233063
申请日：2012-07-10
申请人： Stefan Andersson , Fenghao Mu , Johan Wernehag
发明人： Stefan Andersson , Fenghao Mu , Johan Wernehag
IPC分类号： H01F29/02 , H01F27/42 , H01F27/34 , H03H7/01 , H03H7/09 , H03H7/38 , H03H7/42 , H01F27/28 , H03H1/00
CPC分类号： H01F29/02 , H01F27/2804 , H01F27/343 , H01F27/42 , H03H7/0115 , H03H7/09 , H03H7/38 , H03H7/42 , H03H7/427 , H03H2001/0078 , H03H2007/013
摘要： A transformer filter arrangement (30) for passing signals at a fundamental frequency and suppressing signals at one or more interfering frequencies is disclosed. It comprises a transformer (100) having a first winding (110) and a second winding (120), wherein the first winding (110) has a first end (112a) and a second end (122b) and the second winding (120) has a first end (122a) and a second end (122b). It further comprises one or more capacitors (130a-e). For each capacitor (130a-c) of a first set of at least one capacitor of the one or more capacitors (130a-e), the capacitor (130a-c) is connected between a pair of taps (a1, a2; b1, b2; c1, c2) of the first winding (110), wherein each tap (a1, a2, b1, b2, c1, c2) of the pair of taps (a1, a2; b1, b2; c1, c2) is located between the first end (112a) and the second end (112b) of the first winding (110), and the capacitor (130a-c), together with an inductive sub segment (140a-c) of the first winding (110), which is connected in parallel with the capacitor (130a-c) between the pair of taps (a1, a2; b1, b2; c1, c2), forms a parallel LC circuit which is tuned to resonate at one of said interfering frequencies for suppressing signals at said one of the interfering frequencies. A corresponding integrated circuit, a corresponding radio receiver circuit, a corresponding radio transmitter circuit, and a corresponding radio communication apparatus are also disclosed.
摘要翻译：公开了一种用于以基本频率传递信号并以一个或多个干扰频率抑制信号的变压器滤波器装置（30）。它包括具有第一绕组（110）和第二绕组（120）的变压器（100），其中第一绕组（110）具有第一端（112a）和第二端（122b）和第二绕组（120）具有第一端（122a）和第二端（122b）。它还包括一个或多个电容器（130a-e）。对于一个或多个电容器（130a-e）中的至少一个电容器的第一组的每个电容器（130a-c），电容器（130a-c）连接在一对抽头（a1，a2; b1，（a1，a2; b1，b2; c1，c2）的每个抽头（a1，a2，b1，b2，c1，c2）位于第一绕组（110）的b2; c1，c2）在第一绕组（110）的第一端（112a）和第二端（112b）之间，以及电容器（130a-c）与第一绕组（110）的感应子段（140a-c）其与所述一对抽头（a1，a2; b1，b2; c1，c2）之间的电容器（130a-c）并联连接，形成并联LC电路，其被调谐为以所述干扰频率之一谐振以抑制在所述一个干扰频率处的信号。还公开了相应的集成电路，相应的无线电接收器电路，相应的无线电发射机电路和相应的无线电通信装置。

10. 发明授权

US09509273B2 Transformer filter arrangement 有权
标题翻译：变压器过滤装置
公开(公告)号：US09509273B2
公开(公告)日：2016-11-29
申请号：US14233497
申请日：2012-06-28
申请人： Stefan Andersson , Fenghao Mu , Johan Wernehag
发明人： Stefan Andersson , Fenghao Mu , Johan Wernehag
IPC分类号： H03H7/09 , H01F27/42 , H03H7/01 , H01F27/29 , H03H7/38 , H03H7/42 , H01F27/28 , H03H1/00
CPC分类号： H03H7/09 , H01F27/2804 , H01F27/29 , H01F27/42 , H01P1/212 , H03H7/0115 , H03H7/1758 , H03H7/1775 , H03H7/1791 , H03H7/38 , H03H7/42 , H03H7/425 , H03H7/427 , H03H2001/0078
摘要： A transformer filter arrangement including a transformer having a first winding and a second winding is provided. Both of the first and the second windings are located between an outer border and an inner border, which is inside the outer border. The transformer filter arrangement further includes at least one reactive sub circuit, each including at least one inductor. The first winding of the transformer is divided into a plurality of winding segments. At least a first one of the at least one reactive sub circuit being connected in series with the winding segments of the first winding between two such winding segments, and having at least one of the at least one inductor located inside said inner border.
摘要翻译：提供了包括具有第一绕组和第二绕组的变压器的变压器滤波器装置。第一和第二绕组都位于外边界和外边界之间的外边界和内边界之间。变压器滤波器装置还包括至少一个无功辅助电路，每个电路包括至少一个电感器。变压器的第一绕组被分成多个绕组段。所述至少一个电抗子电路中的至少一个与所述第一绕组的绕组段串联连接在所述两个所述绕组段之间，并且所述至少一个电感器中的至少一个位于所述内部边界的内部。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式