公开(公告)号：US06950479B2

公开(公告)日：2005-09-27

申请号：US09976862

申请日：2001-10-15

申请人： Sven Mattisson ,  Leif Wilhelmsson ,  Peter Markenlöv

发明人： Sven Mattisson ,  Leif Wilhelmsson ,  Peter Markenlöv

IPC分类号： H03F3/45 ,  H03K5/003 ,  H04L25/06 ,  H04L27/14 ,  H04L27/20 ,  H03L5/00 ,  H04J3/02 ,  H04L1/00

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：US06891423B2

公开(公告)日：2005-05-10

申请号：US10383370

申请日：2003-03-06

申请人： Christian Björk ,  Magnus Wiklund ,  Sven Mattisson

发明人： Christian Björk ,  Magnus Wiklund ,  Sven Mattisson

IPC分类号： H03D7/14 ,  G06G7/12

CPC分类号： H03D7/1441 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1483 ,  H03D7/165 ,  H03D2200/009

摘要： A quadrature switching mixer is provided for mixing a received RF signal and a local oscillator signal, while rejecting an image signal associated with the RF signal. Input signal components in quadrature, that is, I and Q input components derived from the received RF signal, are respectively coupled through first and second input paths to corresponding commuting switches in a configuration of switches. Each of the switches operates to multiply respective quadrature components of RF and local oscillator signals to provide quadrature output signal components. A unidirectional device, such as a buffer amplifier included in a signal splitter, is placed in each input path to prevent any portion of an output signal component from leaking backward through one of the input paths to the other input path, and thus to the other output signal component.

摘要翻译： 提供了正交开关混频器，用于混合接收的RF信号和本地振荡器信号，同时拒绝与RF信号相关联的图像信号。 正交的输入信号分量，即从接收的RF信号导出的I和Q输入分量分别通过第一和第二输入路径耦合到交换机的配置中的对应的通勤交换机。 每个开关操作以将RF和本地振荡器信号的相应正交分量相乘以提供正交输出信号分量。 诸如信号分离器中包括的缓冲放大器的单向设备被放置在每个输入路径中，以防止输出信号分量的任何部分通过输入路径中的一条向后泄漏到另一输入路径，从而向另一个 输出信号分量。

公开(公告)号：US06744294B1

公开(公告)日：2004-06-01

申请号：US09567015

申请日：2000-05-09

申请人： Lars Svensson ,  Sven Mattisson

发明人： Lars Svensson ,  Sven Mattisson

IPC分类号： H03K512

CPC分类号： H03F1/223 ,  H03F2200/114 ,  H03F2200/417 ,  H03K17/162 ,  H03K19/00361

摘要： A method and apparatus for minimizing harmonic content in a digital signal driver circuit are disclosed. A digital input signal applied to an input node generates a corresponding digital output in a circuit with two or more MOS devices in cascode connection with each other. The slew rate of one or more edge transitions associated with the output signal are controlled using one or more parasitic capacitances associated with the fabrication of two or more cascode connected MOS devices. The two or more cascode connected MOS devices may further each have gate electrodes connected to a fixed potential so as to minimize said harmonic content. A control signal may further be applied to each gate electrode to turn off a leakage current path between source and drain electrodes. Harmonics may further be controlled by limiting a conductance between gate electrodes and fixed potentials using an active or passive device.

摘要翻译： 公开了一种用于最小化数字信号驱动器电路中的谐波含量的方法和装置。 施加到输入节点的数字输入信号在具有彼此并联连接的两个或多个MOS器件的电路中产生相应的数字输出。 使用与两个或更多个共源共栅连接的MOS器件的制造相关联的一个或多个寄生电容来控制与输出信号相关联的一个或多个边沿跃迁的转换速率。 两个或更多个共源共栅连接的MOS器件还可以进一步具有连接到固定电位的栅电极，以使所述谐波含量最小化。 还可以将控制信号施加到每个栅电极以关闭源极和漏极之间的漏电流路径。 通过使用有源或无源器件限制栅电极和固定电位之间的电导可以进一步控制谐波。

公开(公告)号：US06714530B1

公开(公告)日：2004-03-30

申请号：US09271552

申请日：1999-03-18

申请人： Jaap Haartsen ,  Sven Mattisson

发明人： Jaap Haartsen ,  Sven Mattisson

IPC分类号： H04B7212

CPC分类号： H04B7/26

摘要： A short-range radio transmitter of a communication device comprising a short-range radio and a long-range radio is controlled to delay packets which are scheduled to be transmitted at the same time as a long-range transmitter of the long-range radio commences or discontinues to transmit. A frequency synthesizer of the short-range radio is thereby not affected by a change in the power supply voltage which otherwise occurs at these moments due to transmission with high power by the long-range transmitter.

摘要翻译： 控制包括短距离无线电和远距离无线电的通信设备的短距离无线电发射机，以延迟与远程无线电的远距离发射机同时发射的分组。 或停止传输。 因此短距离无线电的频率合成器不受由于长距离发射机的高功率传输而在这些时刻发生的电源电压的变化的影响。

公开(公告)号：US06490706B2

公开(公告)日：2002-12-03

申请号：US09726908

申请日：2000-11-30

申请人： Sven Mattisson

发明人： Sven Mattisson

IPC分类号： G06F1750

CPC分类号： H03H11/42 ,  H03H11/08

摘要： The invention relates to a filter circuit and a method for making a filter circuit comprising at least one gyrator core section (GCi) having four inverters mutually connected in a loop configuration between a pair of input terminals (i—1; i—2) and a pair of output terminals (o—1; o—2). At least one common mode feedback section (CMIi, CMOi) is provided between the pair of input terminals and/or the pair of output terminals. The common mode feedback section comprises two series connections respectively formed by an inverter and a short-sectioned inverter connected antiparallelly between the input terminals or the output terminals. The inverters may be constituted by a MOS, CMOS or BiCMOS or bipolar transistor. According to the invention, the channel region dimensions of the transistors of the gyrator core section and/or the common mode feedback section are selected such that the relationship g*C≧gm*cm is fulfilled, where g is the effective conductive loading of the gyrator core section terminals, C is the effective capacitive loading of the gyrator core section terminals, gm is the effective gyration constant of the gyrator core section, and cm is the effective transcapacitance of the gyrator core section.

摘要翻译： 本发明涉及一种滤波器电路和滤波电路的制造方法，该滤波电路包括至少一个具有四个反相器的回转器铁心部分（GCi），该四个反相器以一对输入端（i-1; i-2）和 一对输出端子（o-1; o-2）。 在一对输入端子和/或一对输出端子之间提供至少一个共模反馈部分（CMIi，CMOi）。 共模反馈部包括分别由反相器和在输入端子或输出端子之间反并联连接的短路逆变器形成的两个串联连接。 反相器可以由MOS，CMOS或BiCMOS或双极晶体管构成。 根据本发明，选择回转器芯部分和/或共模反馈部分的晶体管的沟道区域尺寸，使得满足g * C> = gm * cm的关系，其中g是有效导电负载 回转器铁心部分端子C是回转器铁芯部分端子的有效电容负载，gm是回转器铁芯部分的有效回转常数，cm是回转器铁芯部分的有效转速。

公开(公告)号：US06259315B1

公开(公告)日：2001-07-10

申请号：US09274330

申请日：1999-03-23

申请人： Sven Mattisson ,  Jacobus Haartsen

发明人： Sven Mattisson ,  Jacobus Haartsen

IPC分类号： H03D300

CPC分类号： H03D3/003 ,  H03J3/08

摘要： A demodulator circuit for demodulating a frequency modulated input, which includes a detector (14) that is operable to produce a demodulated signal from an incoming frequency modulated signal. A tuning circuit (19) is connected to the detector and operable to vary the frequency response characteristics of the detector. An auxiliary detector (25, 26) is connected to receive a reference frequency signal and to provide an auxiliary tuning signal to the detector on the basis of detection of the reference frequency signal.

摘要翻译： 一种用于解调频率调制输入的解调器电路，其包括可操作以从输入频率调制信号产生解调信号的检测器（14）。 调谐电路（19）连接到检测器并可操作以改变检测器的频率响应特性。 辅助检测器（25,26）被连接以接收参考频率信号，并且在检测基准频率信号的基础上向检测器提供辅助调谐信号。

公开(公告)号：US4459554A

公开(公告)日：1984-07-10

申请号：US331984

申请日：1981-12-18

申请人： Sven Mattisson

发明人： Sven Mattisson

IPC分类号： H03F1/08 ,  H03F1/00

CPC分类号： H03F1/083 ,  H03F1/34 ,  H03F3/185 ,  H03F2203/45138 ,  H03F2203/45526

摘要： An equalization amplifier (30) is disclosed which includes two amplifier stages (32, 34) connected in cascade. The first amplifier stage (32) includes a low pass filter amplifier (40) having a pole frequency of F1 and a feed forward path (36) bypassing the low pass filter amplifier. The feed forward path provides the input signal to an adder circuit (42) where it is added to the output of the low pass filter amplifier. The effect of this addition is to provide the first amplifier with a zero frequency of F2, where F2 is greater than F1. The resulting sum signal is applied to the second amplifier stage (34) which also has a low pass filter characteristic. The second filter has a pole frequency of F3, where F3 is greater than F2. The equalization amplifier is particularly useful for providing RIAA equalization of phono cartridge output signals.

摘要翻译： 公开了一种均衡放大器（30），其包括串联连接的两个放大器级（32,34）。 第一放大器级（32）包括具有极点频率F1的低通滤波器放大器（40）和绕过低通滤波器放大器的前馈路径（36）。 前馈路径将输入信号提供给加法器电路（42），在加法器电路（42）中将其输入到低通滤波放大器的输出端。 该添加的效果是提供第一放大器具有F2的零频率，其中F2大于F1。 所得到的和信号被施加到也具有低通滤波器特性的第二放大器级（34）。 第二个滤波器的极点频率为F3，其中F3大于F2。 均衡放大器特别适用于提供唱机输出信号的RIAA均衡。

公开(公告)号：US08681894B2

公开(公告)日：2014-03-25

申请号：US12611677

申请日：2009-11-03

申请人： Fenghao Mu ,  Sven Mattisson

发明人： Fenghao Mu ,  Sven Mattisson

IPC分类号： H04L27/00

CPC分类号： H03F3/24 ,  H03F3/195 ,  H03F3/211 ,  H03F2200/336

摘要： A digital affine transformation modulator and power amplifier drives a transmitter antenna. The modulator performs an affine transformation on a signal, wherein the I, Q space is mapped to a plurality of sectors. A signal in a sector is expressed as the sum of two vectors, the angles of which define the sector boundaries. A digital power amplifier comprises a plurality of amplifier cells, each cell comprising at least two amplifier units. For a given signal, each amplifier unit selectively amplifies a clock signal having a phase corresponding to one of the boundary angles of the signal's affine transformed sector. A subset of the plurality of amplifier cells receiving each phase clock signal are enabled, based on the magnitude of the associated vector describing the signal in affine transform space. The modulation scheme exhibits higher efficiency than quadrature modulation, without the bandwidth expansion and group delay mismatch of polar modulation.

摘要翻译： 数字仿射变换调制器和功率放大器驱动发射机天线。 调制器对信号执行仿射变换，其中I，Q空间映射到多个扇区。 扇区中的信号被表示为两个矢量的和，它们的角度限定了扇区边界。 数字功率放大器包括多个放大器单元，每个单元包括至少两个放大器单元。 对于给定信号，每个放大器单元选择性地放大具有对应于信号仿射变换扇区的一个边界角的相位的时钟信号。 基于描述仿射变换空间中的信号的相关矢量的大小，启用接收每个相位时钟信号的多个放大器单元的子集。 调制方案表现出比正交调制更高的效率，没有频带扩展和极化调制的群延迟失配。

公开(公告)号：US08351874B2

公开(公告)日：2013-01-08

申请号：US12099550

申请日：2008-04-08

申请人： Paul Wilkinson Dent ,  Sven Mattisson

发明人： Paul Wilkinson Dent ,  Sven Mattisson

IPC分类号： H03C1/52

CPC分类号： H04B1/0458

摘要： Methods and apparatus are disclosed for automatically adjusting antenna impedance match in a wireless transceiver employing phase-amplitude modulation. According to some embodiments of the invention, a wireless transceiver comprises a transmitter circuit and a receiver circuit connected to the antenna by a transmit/receive duplexer. An electronically adjustable matching network is located between the transmitter output and the antenna. To control the adjustable matching network, a directional coupler is located between the transmitter output and the matching network to separate transmit signals reflected from the antenna system, including the antenna, the matching network and the T/R duplexer. The reflected transmit signals are routed to the receiver circuit, which digitizes the reflected signal and determines an antenna reflection coefficient based on the digitized reflected signal and the modulation signal used to create the transmit signal. The complex antenna reflection coefficient is used to determine any adjustment needed to the antenna matching network.

摘要翻译： 公开了用于在采用相位幅度调制的无线收发器中自动调整天线阻抗匹配的方法和装置。 根据本发明的一些实施例，无线收发器包括发射机电路和通过发射/接收双工器连接到天线的接收机电路。 电子可调匹配网络位于发射机输出和天线之间。 为了控制可调匹配网络，定向耦合器位于发射机输出和匹配网络之间，以分离天线系统反射的发射信号，包括天线，匹配网络和T / R双工器。 反射的发射信号被路由到接收机电路，其对反射信号进行数字化，并且基于用于产生发射信号的数字化反射信号和调制信号确定天线反射系数。 复合天线反射系数用于确定天线匹配网络所需的任何调整。

公开(公告)号：US20120252374A1

公开(公告)日：2012-10-04

申请号：US13503168

申请日：2009-10-23

申请人： Sven Mattisson ,  Pietro Andreani ,  Daniele Mastantuono

发明人： Sven Mattisson ,  Pietro Andreani ,  Daniele Mastantuono

IPC分类号： H04B1/38 ,  H04B1/10

CPC分类号： H03D1/04 ,  H03D7/12 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D2200/0088

摘要： The present disclosure generally relates to the field of receiver structures in radio communication systems and more specifically to passive mixers in the receiver structure and to a technique for converting a first signal having a first frequency into a second signal having a second frequency by using a third signal having a third frequency. A passive mixer for converting a first signal having a first frequency into a second signal having a second frequency by using a third signal having a third frequency comprises a cancellation component 220 for generating a first cancellation signal for cancelling second order intermodulation components by superimposing the first signal weighted by a cancellation value on the third signal; and a mixing component 231 having a first terminal 232 for receiving the first signal, a second terminal 234 for outputting the second signal, and a third terminal 236 for receiving the first cancellation signal, wherein the mixing component 231 is adapted to provide the second signal as output at the second terminal 234 by mixing the first signal provided as input at the first terminal 232 and the first cancellation signal provided as input at the third terminal 236.

摘要翻译： 本公开通常涉及无线电通信系统中的接收机结构领域，更具体地涉及接收机结构中的无源混频器以及通过使用第三频率将具有第一频率的第一信号转换成具有第二频率的第二信号的技术 信号具有第三频率。 一种无源混频器，用于通过使用具有第三频率的第三信号将具有第一频率的第一信号转换为具有第二频率的第二信号包括消除部件220，用于产生用于通过将第一频率叠加的第二次互调分量 信号由第三信号的抵消值加权; 以及混合部件231，其具有用于接收第一信号的第一端子232，用于输出第二信号的第二端子234和用于接收第一抵消信号的第三端子236，其中混合部件231适于提供第二信号 作为第二端子234处的输出，通过混合在第一端子232处作为输入提供的第一信号和在第三端子236处作为输入提供的第一抵消信号。