公开(公告)号：US20100159837A1

公开(公告)日：2010-06-24

申请号：US12339726

申请日：2008-12-19

申请人： Paul Wilkinson Dent ,  Sven Mattisson

发明人： Paul Wilkinson Dent ,  Sven Mattisson

IPC分类号： H04B1/00 ,  H04K1/10

CPC分类号： H04B1/525

摘要： Circuits and methods are disclosed for reducing interference from transmitter leakage in a radio transceiver. An exemplary method for reducing interference from transmitter leakage in a radio transceiver comprises downconverting, filtering, and sampling a radio frequency signal comprising a desired signal and a transmitter leakage signal to obtain a sampled signal of interest. The method further comprises generating a sampled distortion signal estimate that estimates one or more distortion products of the transmitter leakage signal, such as a squared amplitude obtained from a square-law device or corresponding digital function. Further, the method comprises dividing the sampled distortion signal estimate and the sampled signal of interest into a plurality of frequency channels. Finally, for a selected number of frequency channels, the method comprises combining the sampled distortion signal estimate for a frequency channel with the corresponding sampled signal of interest for the same frequency channel to obtain interference-reduced signal samples for the frequency channel.

摘要翻译： 公开了用于减少无线电收发器中发射机泄漏的干扰的电路和方法。 用于减少无线电收发机中的发射机泄漏的干扰的示例性方法包括对包括期望信号和发射机泄漏信号的射频信号进行下变频，滤波和采样，以获得感兴趣的采样信号。 该方法还包括生成估计发射机泄漏信号的一个或多个失真产物的采样失真信号估计，例如从平方律装置获得的平方振幅或相应的数字功能。 此外，该方法包括将采样的失真信号估计和所获取的采样信号分成多个频率信道。 最后，对于选定数量的频道，该方法包括将用于频率信道的采样失真信号估计与相同频率信道的对应采样信号组合，以获得用于频率信道的干扰减小信号样本。

公开(公告)号：US20100112972A1

公开(公告)日：2010-05-06

申请号：US12685873

申请日：2010-01-12

申请人： Sven Mattisson

发明人： Sven Mattisson

IPC分类号： H04B1/26

CPC分类号： H03D7/1441 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0025 ,  H03D2200/0043

摘要： A method and system for increasing the compression point of a receiver by deriving a feedback signal from mixer output signals. The feedback signal prevents the receiver from going into compression on strong out-of-band or blocking signals, while enhancing the receiver gain at the desired frequency. The desired frequency coincides with the local oscillator (LO) signal and is therefore particularly applicable for, but not limited to, homodyne receivers where selectivity can be made quite narrowband. Since the selectivity is coupled to the LO, a tunable receiver may be achieved that enables selectivity over a wide range of input frequencies.

摘要翻译： 一种用于通过从混频器输出信号导出反馈信号来增加接收机的压缩点的方法和系统。 反馈信号防止接收机在强大的带外或阻塞信号上进行压缩，同时在所需频率下增强接收机增益。 期望的频率与本地振荡器（LO）信号一致，因此特别适用于但不限于可以使选择性相当窄带的零差接收机。 由于选择性耦合到LO，所以可以实现可调谐的接收器，其可以在宽范围的输入频率上实现选择性。

公开(公告)号：US20090325518A1

公开(公告)日：2009-12-31

申请号：US12147962

申请日：2008-06-27

申请人： Sven Mattisson ,  Paul Wilkinson Dent

发明人： Sven Mattisson ,  Paul Wilkinson Dent

IPC分类号： H03D7/16

CPC分类号： H04B1/109 ,  H04B1/30

摘要： Circuits and methods are disclosed for compensating for received signal distortion caused by non-linearities in the receiver circuitry. An exemplary receiver circuit includes a distortion waveform generator configured to approximate one or more non-linear response characteristics of a downconverter circuit used to downconvert the received radio frequency signal. The estimated distortion waveform thus produced is filtered, using a filter or filters substantially similar to those used for filtering an intermediate frequency signal that includes the desired signal and non-linear distortion products caused by strong interfering signals. The filtered estimated distortion waveform and the intermediate frequency are sampled, to obtain a sampled distortion signal and a sampled signal of interest. The sampled distortion signal is scaled, and subtracted from the sampled signal of interest to obtain reduced-interference signal samples. In some embodiments, the scaling factor is determined by correlating the sampled signal of interest with the sampled distortion signal.

摘要翻译： 公开了用于补偿由接收机电路中的非线性引起的接收信号失真的电路和方法。 示例性接收器电路包括失真波形发生器，其被配置为近似用于下变频接收的射频信号的下变频器电路的一个或多个非线性响应特性。 使用与用于滤波包括由强干扰信号引起的期望信号和非线性失真产物的中频信号基本相似的滤波器或滤波器来滤波所产生的估计失真波形。 对经滤波的估计失真波形和中频进行采样，以获得采样的失真信号和感兴趣的采样信号。 采样的失真信号被缩放，并从感兴趣的采样信号中减去以获得减小干扰的信号样本。 在一些实施例中，通过将感兴趣的采样信号与采样的失真信号相关来确定缩放因子。

公开(公告)号：US07580683B2

公开(公告)日：2009-08-25

申请号：US11044287

申请日：2005-01-27

申请人： Karl Håkan Torbjörn Gärdenfors ,  Sven Mattisson ,  Jacobus Cornelis Haartsen

发明人： Karl Håkan Torbjörn Gärdenfors ,  Sven Mattisson ,  Jacobus Cornelis Haartsen

IPC分类号： H04B1/40

CPC分类号： H04B1/44 ,  H04B1/3833 ,  H04B1/408 ,  H04B1/715 ,  H04B15/00 ,  H04B2001/7152 ,  H04J3/10 ,  H04L5/1461 ,  H04L27/122

摘要： An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.

公开(公告)号：US20080008325A1

公开(公告)日：2008-01-10

申请号：US11482595

申请日：2006-07-08

申请人： Michael Holmstrom ,  Bengt Edholm ,  Sven Mattisson

发明人： Michael Holmstrom ,  Bengt Edholm ,  Sven Mattisson

IPC分类号： H04H5/00

CPC分类号： H04S1/00 ,  H04S7/00 ,  H04S7/30

摘要： A method and ASIC for canceling crosstalk between a first stereo channel and a second stereo channel, wherein a first signal is input to a first output amplifier for the first channel, and a second signal is input to a second output amplifier for the second channel, and an output load for each output amplifier is connected between each output amplifier and a reference amplifier. In one embodiment, the first and second signals are split prior to inputting the signals to the first and second output amplifiers, and a gain-adjusted portion of each signal is added to the other signal on the inputs of the output amplifiers. In another embodiment, the first and second input signals are again split into two paths each. While a first path of each signal is inputted to each signal's respective output amplifier, the second paths of the first and second signals are adding together. The resulting sum is adjusted by a gain function, biased by a suitable DC voltage, and input to the reference amplifier.

摘要翻译： 一种用于消除第一立体声通道和第二立体声通道之间的串扰的方法和ASIC，其中第一信号被输入到第一通道的第一输出放大器，第二信号被输入到用于第二通道的第二输出放大器， 并且每个输出放大器的输出负载连接在每个输出放大器和参考放大器之间。 在一个实施例中，在将信号输入到第一和第二输出放大器之前，第一和第二信号被分离，并且每个信号的增益调整部分被添加到输出放大器的输入端上的另一个信号。 在另一个实施例中，第一和第二输入信号又被分成两个路径。 当每个信号的第一路径被输入到每个信号的相应输出放大器时，第一和第二信号的第二路径被加在一起。 所得到的和通过增益函数调整，由适当的直流电压偏置，并输入到参考放大器。

公开(公告)号：US07269144B2

公开(公告)日：2007-09-11

申请号：US11271173

申请日：2005-11-11

申请人： Karl Håkan Torbjörn Gärdenfors ,  Sven Mattisson ,  Jacobus Cornelis Haartsen

发明人： Karl Håkan Torbjörn Gärdenfors ,  Sven Mattisson ,  Jacobus Cornelis Haartsen

IPC分类号： H04Q1/00

CPC分类号： H04B1/44 ,  H04B1/3833 ,  H04B1/408 ,  H04B1/715 ,  H04B15/00 ,  H04B2001/7152 ,  H04J3/10 ,  H04L5/1461 ,  H04L27/122

摘要： An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.

摘要翻译： 整个无线电收发器可以完全集成到一个IC芯片中。 为了在芯片上集成IF滤波器，使用具有低IF的外差架构。 单个直接调制的VCO用于传输期间的上转换和接收期间的下变频。 在VCO的振荡器槽中使用接合线作为谐振器。 在空中接口中使用TDD方案来消除串扰或泄漏。 高斯形二进制FSK调制方案用于提供许多其他实现优点。

公开(公告)号：US07263373B2

公开(公告)日：2007-08-28

申请号：US11129828

申请日：2005-05-16

申请人： Sven Mattisson

发明人： Sven Mattisson

IPC分类号： H04Q7/20

CPC分类号： H04M1/605 ,  H04M1/6016

摘要： A proximity detector for use in a mobile telephone having at least a microphone and a loudspeaker operatively connected to a signal processor is presented. The proximity detector includes data processing and control modules having a module for controlling the signal processor for activating the loudspeaker to reproduce an acoustic control signal. A correlator correlates a control signal received directly by the microphone and a control signal being reflected from a user of the telephone and then received by the microphone to determine the distance between the telephone and the user. A signal level controller controls the signal processor to vary the signal level of an audible signal reproduced by the loudspeaker depending on the determined distance between the telephone and the user.

摘要翻译： 提供了一种用于移动电话中的接近检测器，其具有至少一个可操作地连接到信号处理器的麦克风和扬声器。 接近检测器包括具有用于控制信号处理器以激活扬声器以再现声控信号的模块的数据处理和控制模块。 相关器将由麦克风直接接收的控制信号和从电话用户反射的控制信号相关联，然后由麦克风接收以确定电话和用户之间的距离。 信号电平控制器控制信号处理器，以根据确定的电话和用户之间的距离来改变扬声器再现的可听信号的信号电平。

公开(公告)号：US07102447B2

公开(公告)日：2006-09-05

申请号：US10837573

申请日：2004-05-04

申请人： Sven Mattisson ,  Hans Hagberg

发明人： Sven Mattisson ,  Hans Hagberg

IPC分类号： H01L7/00

CPC分类号： H03B5/04

摘要： Disclosed are methods and circuit configurations for reference frequency signal distribution circuitry that suppress unwanted spurious components introduced by way of RF signal leakage. The methods and circuitry may include relocating components of a buffer along a reference frequency signal path, thereby suppressing conductive and inductive components associated with RF leakage paths entering the circuitry. A filter also may be used after the buffer to suppress spurious components resulting from subsampling of unwanted tones in a phase frequency detector or intermodulation between the reference signal and interference tones in the signal-path of the buffer.

摘要翻译： 公开了用于抑制通过RF信号泄漏引入的不想要的杂散分量的参考频率信号分配电路的方法和电路配置。 方法和电路可以包括沿着参考频率信号路径重新定位缓冲器的部件，从而抑制与进入电路的RF泄漏路径相关联的导电和感应部件。 也可以在缓冲器之后使用滤波器来抑制由相位频率检测器中的不想要的音调的二次采样引起的杂散分量或者在缓冲器的信号路径中的参考信号和干扰音调之间的互调。

公开(公告)号：US07079590B2

公开(公告)日：2006-07-18

申请号：US11220034

申请日：2005-09-06

申请人： Sven Mattisson ,  Leif Wilhelmsson ,  Peter Markenlöv

发明人： Sven Mattisson ,  Leif Wilhelmsson ,  Peter Markenlöv

IPC分类号： H04L3/02 ,  H04L1/00 ,  H04J3/02 ,  H03L5/00

CPC分类号： H04L25/061 ,  H03F3/45986 ,  H03K5/003 ,  H04L25/062 ,  H04L27/142

摘要： A method of estimating a DC offset value of a signal includes estimating a DC offset value of a preamble part of the signal using a pair of diodes (D1, D2) and a resistor (R) connected in parallel. During receipt of the data part of the signal, the diode pair (D1, D2) is switched out of the circuit by a switch (SW). During reception of the data part, the DC level is estimated using a low pass filter (R,C).

摘要翻译： 估计信号的DC偏移值的方法包括：使用并联连接的一对二极管（D 1，D 2）和电阻器（R）来估计信号的前导码部分的DC偏移值。 在接收信号的数据部分期间，二极管对（D 1，D 2）通过开关（SW）从电路切换出来。 在接收数据部分期间，使用低通滤波器（R，C）来估计DC电平。

公开(公告)号：US20060049883A1

公开(公告)日：2006-03-09

申请号：US10526244

申请日：2003-08-14

申请人： Sven Mattisson

发明人： Sven Mattisson

IPC分类号： H03B5/32

CPC分类号： H03B5/364 ,  H03B5/36

摘要： A balanced crystal oscillator circuit comprising: a piezoelectric element Xtal (207; 215; 222,221; 313); a first oscillator subcircuit (202; 210; 218; 302) incorporating a transistor (204;212;220;304); and a second oscillator subcircuit (201;209;217;301) incorporating a transistor (203; 211; 219; 303); wherein the transistors each have different types of transistor terminals (C,B,E; D;G;S), and wherein the oscillator subcircuits are configured with at least three interconnections. Each interconnection comprise a pair of like type of transistor terminals; wherein a first of said interconnections constitutes a connection to a ground reference (gnd); a second of said interconnections is via a first resonator element (207;215;223;313); and a third of said interconnections is via a second resonator element (208;216;224;314); said first and second circuits are arranged to interact by means of said first and second resonator elements to form a balanced oscillator signal. A dual common base or a dual common collector configuration is preferred.

摘要翻译： 一种平衡晶体振荡器电路，包括：压电元件Xtal（207; 215; 222,221; 313）; 包括晶体管（204; 212; 220; 304）的第一振荡器子电路（202; 210; 218; 302） 以及并入有晶体管（203; 211; 219; 303）的第二振荡器子电路（201; 209; 217; 301） 其中所述晶体管各自具有不同类型的晶体管端子（C，B，E; D; G; S），并且其中所述振荡器子电路配置有至少三个互连。 每个互连包括一对类似的晶体管端子; 其中所述互连中的第一个构成与地面参考（gnd）的连接; 所述互连中的第二个是经由第一谐振器元件（207; 215; 223; 313）; 并且所述互连中的三分之一经由第二谐振器元件（208; 216; 224; 314）; 所述第一和第二电路被布置成通过所述第一和第二谐振器元件相互作用以形成平衡振荡器信号。 双重共用基底或双共同收集器配置是优选的。