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公开(公告)号：US06724247B2
公开(公告)日：2004-04-20
申请号：US10234180
申请日：2002-09-05
Applicant: Sven Mattisson , Jacobus C. Haartsen
Inventor： Sven Mattisson , Jacobus C. Haartsen
IPC: H03D300
Abstract: An FM demodulator compensates for DC offset by detecting the positive peak value of the frequency demodulated signal (D1, C2, R1) and the negative peak value of the frequency demodulated signal (D2, C3, R2). The mean of the positive and negative peak values is determined (C1, R3, R4) to produce an estimation of a DC offset value. This estimated DC offset value is then used to compensate for DC offset in the frequency demodulated signal. This circuit has the advantage of enabling the DC offset to be calculated without requiring complex digital signalling processing, and without requiring the input signal to have a zero mean. A signal strength signal RSSI may be used to disconnect the DC offset compensation circuitry during periods when the input signal strength is weak.
Abstract translation: FM解调器通过检测频率解调信号（D1，C2，R1）的正峰值和频率解调信号（D2，C3，R2）的负峰值来补偿DC偏移。 确定正和负峰值的平均值（C1，R3，R4）以产生DC偏移值的估计。 然后使用该估计的DC偏移值来补偿频率解调信号中的DC偏移。 该电路具有使得能够计算DC偏移而不需要复杂的数字信号处理，而不需要输入信号具有零均值的优点。 信号强度信号RSSI可以用于在输入信号强度较弱的时段断开DC偏移补偿电路。
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公开(公告)号：US06477148B1
公开(公告)日：2002-11-05
申请号：US09565223
申请日：2000-05-05
IPC: H04Q100
CPC classification number: H04B1/44 , H04B1/3833 , H04B1/408 , H04B1/715 , H04B15/00 , H04B2001/7152 , H04J3/10 , H04L5/1461 , H04L27/122
Abstract: 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.
Abstract translation: 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。
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公开(公告)号：US06188275B1
公开(公告)日：2001-02-13
申请号：US09274479
申请日：1999-03-23
Applicant: Sven Mattisson , Jacobus Haartsen
Inventor： Sven Mattisson , Jacobus Haartsen
IPC: H03D300
CPC classification number: H03D3/005 , H03J2200/28 , H04L27/16
Abstract: A demodulator circuit for demodulating a frequency modulated input signal includes a filter (12) for receiving an incoming input signal and for providing a filtered output signal, a detector (16) for receiving the filtered output signal, and for producing a demodulated output signal therefrom, a tuning circuit (18, 20) which is operable to introduce a test signal into the demodulator circuit in the absence of an incoming input signal, and to vary the frequency response characteristics of at least one of the filter and detector in response to the test signal.
Abstract translation: 用于解调频率调制输入信号的解调器电路包括用于接收输入输入信号并提供经滤波的输出信号的滤波器（12），用于接收滤波后的输出信号的检测器（16），以及用于产生经解调的输出信号 ，调谐电路（18,20），其可操作以在没有输入输入信号的情况下将测试信号引入所述解调器电路中，以及响应于所述滤波器和检测器中的至少一个的频率响应特性而改变 测试信号。
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公开(公告)号：US6009314A
公开(公告)日：1999-12-28
申请号：US972210
申请日：1997-11-17
Applicant: Christian Bjork , Martin Lantz , Sven Mattisson
Inventor： Christian Bjork , Martin Lantz , Sven Mattisson
CPC classification number: H01P1/15
Abstract: An antenna switch for selectively connecting an output differential signal pair of an output power amplifier to a single-ended signal of an antenna when transmitting and selectively connecting an input differential signal pair of a low noise input amplifier to the single-ended signal of the antenna when receiving. A first balun having a single ended-signal connected to an antenna connects a first and second output differential signal to a power output amplifier. A second balun having a single-ended signal connected to the antenna connects a first and second input differential signal to a low noise input amplifier. A first diode selectively shorts the first output differential signal to the second output differential signal of the first balun when receiving and a second diode selectively shorts the first input differential signal to the second input differential signal of the second balun when transmitting.
Abstract translation: 一种天线开关，用于当将低噪声输入放大器的输入差分信号对和天线的单端信号进行发送和选择性连接时，有选择地将输出功率放大器的输出差分信号对与天线的单端信号相连接 收到时。 具有连接到天线的单端信号的第一平衡 - 不平衡变换器将第一和第二输出差分信号连接到功率输出放大器。 具有连接到天线的单端信号的第二平衡 - 不平衡变换器将第一和第二输入差分信号连接到低噪声输入放大器。 当接收时，第一二极管将第一输出差分信号选择性地短路到第一平衡 - 不平衡变换器的第二输出差分信号，并且当发送时第二二极管将第一输入差分信号选择性地短路到第二平衡 - 不平衡变换器的第二输入差分信号。
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公开(公告)号：US4460872A
公开(公告)日：1984-07-17
申请号：US327074
申请日：1981-12-03
Applicant: Sven Mattisson
Inventor： Sven Mattisson
CPC classification number: H03F3/4521 , H03F1/26 , H03F3/45071 , H03F2200/372 , H03F2203/45031 , H03F2203/45366 , H03F2203/45498
Abstract: A low noise amplifier circuit (FIGS. 4 and 5) is disclosed including plural differential amplifiers having their inputs and outputs connected to common input and output lines (50, 52; 54, 56). In the disclosure, each differential amplifier is comprised of a pair of bipolar junction transistors (40, 42; 58, 60; 64, 66) of the same type. Parallel connecting of the differential amplifiers in the disclosed fashion reduces the Johnson noise introduced by the base spreading resistances of the individual transistors. Since differential amplifiers, per se, are connected in parallel rather than their component transistors, thermal runaway is not a problem.
Abstract translation: 公开了一种低噪声放大器电路（图4和图5），其包括多个差分放大器，其输入和输出连接到公共输入和输出线（50,52; 54,56）。 在本公开中，每个差分放大器由相同类型的一对双极结型晶体管（40,42; 58,60,64,66）组成。 以所公开的方式平行连接差分放大器减少了由各个晶体管的基极扩展电阻引入的约翰逊噪声。 由于差分放大器本身并联而不是其组件晶体管，因此热失控不成问题。
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Patent Agency Ranking
公开(公告)号：US20140133377A1
公开(公告)日：2014-05-15
申请号：US14123433
申请日：2012-05-28
Applicant: Thomas Olsson , Anders Carlsson , Sven Mattisson , Lars Sundström
Inventor： Thomas Olsson , Anders Carlsson , Sven Mattisson , Lars Sundström
CPC classification number: H04W52/0225 , H04B17/309 , H04B17/318 , H04L1/20 , H04W52/0245 , Y02D70/1262 , Y02D70/146
Abstract: The present invention takes advantage of a phase correlation process at a receiver, for example the plurality of different clock phases that are provided for ascertaining the most favourable phase for burst reception in a digital signalling link, and uses this phase correlation information for a different purpose. For example, the plurality of different clock phases are used to provide an indication of the quality of the received signal. The quality of the received signal can then be used to adapt one or more parameters in the digital plurality of different clock phases signalling link, to save power when desired.
Abstract translation: 本发明利用接收机的相位相关处理，例如提供用于确定数字信令链路中用于突发接收的最有利相位的多个不同时钟相位，并且将该相位相关信息用于不同的目的 。 例如，多个不同的时钟相位用于提供接收信号的质量的指示。 然后，接收信号的质量可用于调整数字多个不同时钟相位信号链路中的一个或多个参数，以便在需要时节省功率。
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公开(公告)号：US08588712B2
公开(公告)日：2013-11-19
申请号：US13361163
申请日：2012-01-30
Applicant: Sven Mattisson , Magnus Nilsson
Inventor： Sven Mattisson , Magnus Nilsson
CPC classification number: H03C3/40
Abstract: A modulation circuit for use in a radiofrequency transmitter includes a local oscillator circuit configured to generate one or more local oscillator signals at a desired frequency and with a duty cycle at or about twenty-five percent, and a modulator configured to generate one or more modulated signals responsive to the one or more local oscillator signals and one or more baseband information signals. In at least one embodiment, the modulation circuit includes a modulator comprising a combined mixing and transconductance circuit that includes a transistor circuit for each baseband information signal serving as a modulation input to the modulator. Each transistor circuit comprises a first transistor driven by the baseband information signal and coupling a modulator output node to a corresponding transconductance element, and a second transistor driven by one of the one or more local oscillator signals and coupling the corresponding transconductance element to a signal ground node.
Abstract translation: 用于射频发射机的调制电路包括本地振荡器电路，其被配置为以期望的频率产生一个或多个本地振荡器信号，占空比为或约为百分之二十五，而调制器被配置为产生一个或多个调制 响应于一个或多个本地振荡器信号的信号和一个或多个基带信息信号。 在至少一个实施例中，调制电路包括一个调制器，该调制器包括组合的混合和跨导电路，其包括用作每个基带信息信号的晶体管电路，用作调制器的调制输入。 每个晶体管电路包括由基带信息信号驱动的第一晶体管，并将调制器输出节点耦合到对应的跨导元件，以及由一个或多个本地振荡器信号之一驱动的第二晶体管，并将相应的跨导元件耦合到信号地 节点。
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公开(公告)号：US20120314602A1
公开(公告)日：2012-12-13
申请号：US13522662
申请日：2011-01-20
Applicant: Jonas Persson , Sven Mattisson
Inventor： Jonas Persson , Sven Mattisson
IPC: H04W24/00
CPC classification number: H04B1/0475 , H04B1/302 , H04L25/061 , H04L27/2647 , H04L27/364 , H04L2027/0016
Abstract: A combination of a phase shifter, a measurement receiver, and an offset estimator enable the d.c. offset in the transmit path of a quadrature transmitter to be distinguished from the d.c. offset in the measurement receiver. The measurement receiver performs a first measurement on the transmit path output with a “normal” phase shift of 0 degrees and 90 degrees for in-phase (I) and quadrature (Q) components, and a second measurement with a “special” phase shift for the I and Q components. In one embodiment, the “special” phase shift for the I and Q components is 180 degrees and 270 degrees, respectively.
Abstract translation: 移相器，测量接收器和偏移估计器的组合使得直流 在正交发射机的发射路径中的偏移量与d.c.进行区分。 在测量接收器中偏移。 测量接收机对于同相（I）和正交（Q）分量以0度和90度的正常相移对发射路径输出执行第一测量，并且对于I和 Q组件。 在一个实施例中，I和Q分量的特殊相移分别为180度和270度。
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公开(公告)号：US08185067B2
公开(公告)日：2012-05-22
申请号：US13015157
申请日：2011-01-27
Applicant: Sven Mattisson , Magnus Nilsson
Inventor： Sven Mattisson , Magnus Nilsson
CPC classification number: H03C3/40
Abstract: A modulation circuit for use in a radiofrequency transmitter includes a local oscillator circuit configured to generate one or more local oscillator signals at a desired frequency and with a duty cycle at or about twenty-five percent, and a modulator configured to generate one or more modulated signals responsive to the one or more local oscillator signals and one or more baseband information signals. In at least one embodiment, the modulation circuit includes a modulator comprising a combined mixing and transconductance circuit that includes a transistor circuit for each baseband information signal serving as a modulation input to the modulator. Each transistor circuit comprises a first transistor driven by the baseband information signal and coupling a modulator output node to a corresponding transconductance element, and a second transistor driven by one of the one or more local oscillator signals and coupling the corresponding transconductance element to a signal ground node.
Abstract translation: 用于射频发射机的调制电路包括本地振荡器电路，其被配置为以期望的频率产生一个或多个本地振荡器信号，占空比为或约为百分之二十五，而调制器被配置为产生一个或多个调制 响应于一个或多个本地振荡器信号的信号和一个或多个基带信息信号。 在至少一个实施例中，调制电路包括一个调制器，该调制器包括组合的混合和跨导电路，其包括用作每个基带信息信号的晶体管电路，用作调制器的调制输入。 每个晶体管电路包括由基带信息信号驱动的第一晶体管和将调制器输出节点耦合到对应的跨导元件，以及由一个或多个本地振荡器信号之一驱动的第二晶体管，并将相应的跨导元件耦合到信号地 节点。
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公开(公告)号：US20120051464A1
公开(公告)日：2012-03-01
申请号：US12869816
申请日：2010-08-27
Applicant: Matthias Kamuf , Bengt Lindoff , Sven Mattisson , Fredrik Nordström
Inventor： Matthias Kamuf , Bengt Lindoff , Sven Mattisson , Fredrik Nordström
CPC classification number: H04L27/2647 , H04L25/03292 , H04L25/03318 , H04L2025/03414
Abstract: Decoding a received Orthogonal Frequency Division Multiplex (OFDM) signal that occupies a first set of subcarriers in a radio frequency spectrum includes ascertaining an interference model that represents interference occurring in the first set of subcarriers caused by a transmitted OFDM signal that occupies a second set of subcarriers in the radio frequency spectrum. A set of scaled soft values is produced that represents information conveyed by the received OFDM signal over the first set of subcarriers, wherein each scaled soft value in the set of scaled soft values corresponds to a respective one of the subcarriers in the first set of subcarriers, and wherein a scaling amount applied to each of the scaled soft values is based on a corresponding level of interference in said respective one of the subcarriers as indicated by the interference model. A decoding process is performed that generates detected data from the scaled soft values.
Abstract translation: 解码在无线电频谱中占用第一组子载波的接收的正交频分多路复用（OFDM）信号包括确定干扰模型，其表示由发送的OFDM信号引起的第一组子载波中所发生的干扰，所述OFDM信号占用第二组 无线电频谱中的子载波。 产生一组缩放的软值，其表示在第一组子载波上由接收的OFDM信号传送的信息，其中该缩放的软值集合中的每个缩放的软值对应于第一组子载波中的相应的一个子载波 ，并且其中应用于每个所述缩放的软值的缩放量基于由所述干扰模型指示的所述相应一个子载波中的相应的干扰电平。 执行从缩放的软值生成检测数据的解码处理。
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