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51. 发明授权

US07903763B2 Bandwidth selection for FM applications 有权
标题翻译： FM应用的带宽选择
公开(公告)号：US07903763B2
公开(公告)日：2011-03-08
申请号：US11701164
申请日：2007-01-31
申请人： Jiri Andrle , Jan Ingerle , Petr Kopecky
发明人： Jiri Andrle , Jan Ingerle , Petr Kopecky
IPC分类号： H04L27/00
CPC分类号： H04B1/1027 , H03J5/242
摘要： A system and method to optimize the quality of a modulated signal. In one aspect, an AM demodulator is used in conjunction with proper bandwidth selection of an FM signal. For example, the AM demodulator can be used to generate an instantaneous absolute value of the FM signal. The average value of the FM signal over a period of time is subtracted from the instantaneous absolute value in order to determine a variance in amplitude in the FM signal. In another aspect, several filters may be tested and the one having the lowest variance in amplitude may be used in order to select the filter having the desirable bandwidth.
摘要翻译：一种优化调制信号质量的系统和方法。在一个方面，AM解调器与FM信号的适当带宽选择结合使用。例如，AM解调器可用于产生FM信号的瞬时绝对值。为了确定FM信号中的幅度方差，从瞬时绝对值中减去一段时间内的FM信号的平均值。在另一方面，可以测试几个滤波器，并且可以使用具有最小幅度变化的滤波器，以便选择具有期望带宽的滤波器。

52. 发明申请

US20090195366A1 HIGH PERFORMANCE RFID TRANSPONDER WITH FAST DOWNLINK 审中-公开
标题翻译：高性能RFID TRANSPONDER与快速下载
公开(公告)号：US20090195366A1
公开(公告)日：2009-08-06
申请号：US12253013
申请日：2008-10-16
申请人： Herbert Meier , Konstantin O. Aslanidis
发明人： Herbert Meier , Konstantin O. Aslanidis
IPC分类号： H04Q5/22
CPC分类号： H03J5/242 , G06K7/10297 , G06K19/0701 , G06K19/07749 , G06K19/07786 , H03J2200/06
摘要： A RFID transponder having a high quality factor antenna (LR), and a resonance capacitor (CR) coupled to the high quality factor antenna (LR) for providing a resonant circuit (LR, CR), wherein the RFID transponder is adapted to vary the quality factor of the resonant circuit (LR, CR) such that the quality factor is low during downlink data transmission when the RFID transponder receives data through the antenna (LR), and the quality factor is high during uplink data transmission, when the RFID transponder transmits data.
摘要翻译：具有高品质因数天线（LR）的RFID应答器和耦合到高品质因数天线（LR）的谐振电容器（CR），用于提供谐振电路（LR，CR），其中RFID应答器适于改变当RFID应答器通过天线（LR）接收数据时，下行链路数据传输期间的质量因子低，并且在上行链路数据传输期间品质因数高，当RFID应答器传输数据。

53. 发明授权

US06275113B1 High frequency tuning amplifier for buffer 失效
标题翻译：用于缓冲器的高频调谐放大器
公开(公告)号：US06275113B1
公开(公告)日：2001-08-14
申请号：US09575029
申请日：2000-05-19
申请人： Kazuhiro Nakano , Hiroki Noumi
发明人： Kazuhiro Nakano , Hiroki Noumi
IPC分类号： H03F3191
CPC分类号： H03J5/242 , H03F3/191 , H03F2200/111 , H03F2200/417
摘要： The high frequency tuning amplifier for buffer has a tuning circuit consisting of a serial circuit of the first and second inductors connected between the output of transistor amplifying stage and the power source, a first capacitor connected in parallel to the serial circuit of first and second inductors, a serial circuit of the second and third capacitors connected in parallel to the second inductor and a switching element to which a band switch voltage is supplied, connected between the connecting point of the second and third capacitors and the reference voltage point. The tuning circuit is tuned to the high band frequency when the switching element is turned ON and to the low band frequency when the switching element is turned OFF.
摘要翻译：用于缓冲器的高频调谐放大器具有由连接在晶体管放大级的输出与电源之间的第一和第二电感器的串联电路组成的调谐电路，与第一和第二电感器的串联电路并联连接的第一电容器与第二电感器并联连接的第二和第三电容器的串联电路和连接在第二和第三电容器的连接点与参考电压点之间的提供频带开关电压的开关元件。当开关元件接通时，调谐电路被调谐到高频带频率，当开关元件断开时调谐到低频带频率。

54. 发明授权

US5722079A Two band 25 channel cordless telephone system 失效
标题翻译：双频25通道无绳电话系统
公开(公告)号：US5722079A
公开(公告)日：1998-02-24
申请号：US632342
申请日：1996-04-10
申请人： Manuel Apraez , Michael John Bonczek , Sung Hee Kim , Hung Chi Lai
发明人： Manuel Apraez , Michael John Bonczek , Sung Hee Kim , Hung Chi Lai
IPC分类号： H04M1/00 , H03J5/24 , H04B1/66 , H04M1/725 , H04M11/00
CPC分类号： H04M1/72502 , H03J5/242
摘要： A cordless telephone system divides the 25 channel bandwidth allocated by the Federal Communications Commission (FCC) into two bands in order to obtain improved noise performance. The front end is tuned to the center frequency of each band and the tuning of the receiver to specific channel frequencies is accomplished via a PLL.
摘要翻译：无绳电话系统将由联邦通信委员会（FCC）分配的25通道带宽划分为两个频段，以获得改进的噪声性能。前端被调谐到每个频带的中心频率，并且接收机对特定信道频率的调谐是通过PLL完成的。

55. 发明授权

US5640688A Tuner and splitter-modulator circuit having a common quartz crystal 失效
标题翻译：具有公共石英晶体的调谐器和分路器调制器电路
公开(公告)号：US5640688A
公开(公告)日：1997-06-17
申请号：US426294
申请日：1995-04-20
申请人： Leo Ruitenburg
发明人： Leo Ruitenburg
IPC分类号： H04N5/38 , H03J5/24 , H04N5/44 , H04B1/40
CPC分类号： H04N5/44 , H03J5/242
摘要： A circuit arrangement comprising a tuner and a splitter-modulator, the latter made up of a splitter and a modulator, the splitter having an RF signal input for receiving an RF input signal, an RF signal output for supplying an RF output signal, and a first line for applying the RF input signal to the tuner. A second line is provided for supplying an RF output signal from the modulator. The tuner is adapted to demodulate the RF input signal and the modulator is adapted to, convert a baseband signal into the RF output signal to be supplied by the modulator. Devices for generating reference oscillations for the tuner and the splitter-modulator have one quartz crystal which is common to the tuner and the splitter-modulator. This results in a reduction in the number of components, particularly for generating the oscillations.
摘要翻译：一种包括调谐器和分路器调制器的电路装置，后者由分路器和调制器组成，分离器具有用于接收RF输入信号的RF信号输入，用于提供RF输出信号的RF信号输出和用于将RF输入信号施加到调谐器的第一行。提供第二行用于从调制器提供RF输出信号。调谐器适于解调RF输入信号，并且调制器适于将基带信号转换成由调制器提供的RF输出信号。用于为调谐器和分路器调制器产生参考振荡的装置具有一个共用于调谐器和分路器调制器的石英晶体。这导致部件数量的减少，特别是用于产生振荡。

56. 发明授权

US5499394A Filter switching circuit 失效
标题翻译：滤波器开关电路
公开(公告)号：US5499394A
公开(公告)日：1996-03-12
申请号：US249642
申请日：1994-05-25
申请人： Gary F. Kaatz , John E. Becker
发明人： Gary F. Kaatz , John E. Becker
IPC分类号： H04B1/18 , H03G5/14 , H03J5/24 , H04B1/16
CPC分类号： H03J5/242 , H03G5/14
摘要： A filter switching circuit for switching between two or more filters. The filter switching circuit may be integrally formed upon an integrated circuit chip and may be advantageously utilized as a portion of a dual bandwidth receiver, such as employed in a radiotelephone, operable to receive both narrowband and wideband signals.
摘要翻译：一种用于在两个或更多个滤波器之间切换的滤波器切换电路。滤波器切换电路可以一体地形成在集成电路芯片上，并且可以有利地用作双带宽接收机的一部分，诸如在无线电话中使用的，可操作以接收窄带和宽带信号。

57. 发明授权

US5068918A Receiver for terrestrial AM and satellite FM-TV broadcasting signals 失效
标题翻译：接收器用于地面上和卫星FM电视广播信号
公开(公告)号：US5068918A
公开(公告)日：1991-11-26
申请号：US530687
申请日：1990-05-30
申请人： Paulus A. M. Verheijen , Ronald P. A. Schiltmans
发明人： Paulus A. M. Verheijen , Ronald P. A. Schiltmans
IPC分类号： H04N5/44 , H03D5/00 , H03D7/16 , H03J5/24 , H04B1/26 , H04N5/46 , H04N7/20
CPC分类号： H03D5/00 , H03D7/161 , H03J5/242 , H04N7/20 , H03D7/165 , H04N5/46
摘要： A receiver for terrestrial AM-HF-TV signals and satellite FM-HF-TV signals in first and second frequency ranges, respectively, of mutually predominantly equal widths, which succeed each other in frequency, includes, arranged one after the other, a HF-AM-FM section, a mixing circuit common for the AM and FM-TV signals and an IF device, oscillator mixing signals being applied from a tuning oscillator to that mixing circuit for a frequency conversion of the AM and FM-HF-TV signals into a first AM and an FM intermediate frequency signal, respectively, having a first AM and an FM intermediate frequency, of which at least the first AM intermediate frequency is located above the first frequency region. In order to enable a simple and cheap realization, in which a tuning oscillator having a comparatively narrow-band tuning range can be used, the first AM intermediate frequency is of the order of magnitude of twice the highest frequency of the first frequency range and the FM intermediate frequency is of the order of magnitude of one-half the lowest frequency of the second frequency range, the IF-device including an AM and a FM-IF section whose inputs are coupled to an output of the mixing circuit for a separate selection and processing of the first AM and the FM-intermediate frequency signals, respectively.

58. 发明授权

US4881272A Multi-band FM receiver for receiving FM broadcasting signals and TV broadcasting sound signals 失效
标题翻译：用于接收FM广播信号和电视广播声音信号的多频FM收音机
公开(公告)号：US4881272A
公开(公告)日：1989-11-14
申请号：US175031
申请日：1988-03-29
申请人： Toyokazu Eguchi
发明人： Toyokazu Eguchi
IPC分类号： H03L7/187 , H03J5/02 , H03J5/24 , H04B1/26
CPC分类号： H03J5/242 , H03J5/0281
摘要： A multi-band receiver for receiving broadcast signals divided by frequencies into an FM group and a TV group, the TV group including at least two different frequency ranges separated by a substantial frequency gap. The receiver includes a band selector for selecting a desired frequency group from the two group, a tuning controller for selecting a desired broadcast frequency within the desired group from a predetermined tuning band, an oscillator for separating signals of the desired frequency from the received broadcast signals and converting the separated signals into audio signals and a frequency adjuster responsive to the band selector and the tuning controller for automatically adjusting the oscillation frequency of the oscillator when the TV group has been selected for substantially removing the frequency gap from the predetermined tuning band.
摘要翻译：一种多频带接收机，用于接收由频率划分成FM组和TV组的广播信号，所述TV组包括由实质频率间隔分开的至少两个不同频率范围。该接收机包括一个频带选择器，用于从两组中选择所需的频率组，一个调谐控制器，用于从预定的调谐频带中选择所需组内的所需广播频率;振荡器，用于从所接收的广播信号中分离所需频率的信号以及响应于所述频带选择器和所述调谐控制器将分离的信号转换成音频信号的频率调节器，以及当已经选择所述TV组以从所述预定调谐频带基本上去除所述频率间隙时，自动调整所述振荡器的振荡频率。

59. 发明授权

US4723306A Wide-band transmitter for short electromagnetic waves 失效
标题翻译：用于短电磁波的宽带发射机
公开(公告)号：US4723306A
公开(公告)日：1988-02-02
申请号：US865629
申请日：1986-05-22
申请人： Helmut Fuenfgelder , Dieter Ochsmann , Johann-Gerhard Zirwas
发明人： Helmut Fuenfgelder , Dieter Ochsmann , Johann-Gerhard Zirwas
IPC分类号： H03J5/24 , H04B1/04
CPC分类号： H04B1/0475 , H03J5/24 , H03J5/242
摘要： A wide band, transistorized power transmitter for the execution of radio traffic requires a filter arrangement consisting of a large number of sub-filters because of the insufficient linearity of the transmitter end stage between the output of the transmitter end stage and the transmitter output. Depending upon the adjusted transmitter frequency, in order to suppress undesired harmonics, one of the sub-filters is switched into the signal path. The relays normally used to switch on and off the sub-filter are unsuitable for carryout out frequency jump operation. By effecting a suitable sub-division of the sub-filters of the filter arrangement into two and more sub-filter groups, between which it is possible to carry out a rapid and non-abrasive switch-over by way of electronic power switches, it is possible without too high an expense to carry out a frequency jump interval which can be arbitrarily adjusted within the overall frequency range.
摘要翻译：用于执行无线电业务的宽带，晶体管功率发射机需要由大量子滤波器组成的滤波器装置，因为发射机端级的输出与发射机输出之间的发射机端级的线性不足。取决于经调整的发射机频率，为了抑制不需要的谐波，子滤波器之一被切换到信号路径。通常用于接通和关闭子滤波器的继电器不适合进行跳频操作。通过将过滤器装置的子过滤器适当地分割成两个或更多个子过滤器组，其间可以通过电子电源开关进行快速和非研磨性切换，可能没有太高的费用来执行可以在整个频率范围内任意调整的频率跳跃间隔。

60. 发明授权

US3863175A Oscillator device having remote radiation-free switch means 失效
标题翻译：具有远程无辐射开关装置的振荡器装置
公开(公告)号：US3863175A
公开(公告)日：1975-01-28
申请号：US34621273
申请日：1973-03-29
申请人： MAGNAVOX CO
发明人： KENT GEORGE A
IPC分类号： H03B5/12 , H03J5/24 , H03J9/00 , H03B19/00
CPC分类号： H03J9/00 , H03B5/1203 , H03B5/1231 , H03B5/124 , H03B5/1256 , H03B5/1265 , H03B2200/0008 , H03B2200/0048 , H03B2200/0062 , H03J5/242 , H03J5/246
摘要： A radio frequency device, e.g., an oscillator having multiple modes, e.g., oscillation rates, with means to select a particular mode from a remote selection station. This invention provides transistor operated selection means at the radio frequency site and connection by means of an ordinary non-shielded line to a remote manual selection station with the coupling between the transistor selection means and the remote selection station being free of rf energy and resultant radiation.
摘要翻译：射频设备，例如具有多个模式（例如振荡速率）的振荡器，具有从远程选择站选择特定模式的装置。本发明在射频现场提供晶体管操作的选择装置，并通过普通非屏蔽线连接到远程手动选择站，其中晶体管选择装置和远程选择站之间的耦合没有能量和合成辐射。

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