公开(公告)号：US20040125239A1

公开(公告)日：2004-07-01

申请号：US10328140

申请日：2002-12-26

发明人： David Rahn ,  Stefan Fulga ,  Brian Robar ,  Walter Bax

IPC分类号： H04N005/50

CPC分类号： H03J5/0227 ,  H03J5/0236 ,  H03J7/065 ,  H03J7/22 ,  H03J7/285 ,  H04N5/50 ,  H04N21/43637 ,  H04N21/4384

摘要： Televisions, especially HDTV, require tremendous bandwidth, however a time interval to switch communication channels may result in the loss of several image frames or a large portion of a single image frame. Unfortunately, small glitches in television signals are not tolerable since this affects the quality of the entertainment. Thus, wireless television tuners are unacceptable to most users because of frequency of glitches occurring as a result of channel hopping. A novel wireless television tuner system is thus disclosed that switchesnullhopsnullbetween frequency channels for transmitting television data to the wireless television tuner. The novel tuner uses a fractional-N (FRAC-N) synthesizer with an improved settling time in order to reduce potential glitches occurring as a result of the channel hopping.

摘要翻译： 电视，特别是HDTV，需要巨大的带宽，然而，切换通信信道的时间间隔可能导致几个图像帧的丢失或单个图像帧的大部分。 不幸的是，电视信号中的小故障是不能容忍的，因为这会影响娱乐的质量。 因此，无线电视调谐器对于大多数用户是不可接受的，因为由于信道跳频而发生毛刺的频率。 因此，公开了一种新颖的无线电视调谐器系统，其用于将电视数据发送到无线电视调谐器的频率信道之间切换。 该小型调谐器使用具有改进的建立时间的分数N（FRAC-N）合成器，以便减少作为信道跳频的结果而发生的潜在毛刺。

公开(公告)号：US4932074A

公开(公告)日：1990-06-05

申请号：US176628

申请日：1988-04-01

申请人： Ben F. McCormick, II

发明人： Ben F. McCormick, II

IPC分类号： H03J7/28

CPC分类号： H03J7/285

摘要： A rapid scanning radio with multi-mode local oscillator control. In one embodiment a phase-locked loop is closed for tuning to all frequencies of interest, and each time the loop locks a DAC is loaded with successive digital values until a value corresponding to the steady-state VCO tuning voltage is found for the currently tuned channel. That digital value is stored for later recall as the tuning value for that channel. Once digital values are determined for all the tunable frequencies in the radio, the loop is opened for high-speed scanning under open-loop control of the DAC.

摘要翻译： 具有多模式本地振荡器控制的快速扫描无线电。 在一个实施例中，闭锁环路用于调谐到所有感兴趣的频率，并且每次循环锁定DAC时都加载连续的数字值，直到找到对应于当前调谐的稳态VCO调谐电压的值 渠道。 该数字值被存储以供以后调用作为该通道的调谐值。 一旦为无线电中的所有可调谐频率确定了数字值，则在DAC的开环控制下，环路打开以进行高速扫描。

公开(公告)号：US4527281A

公开(公告)日：1985-07-02

申请号：US544746

申请日：1983-10-24

申请人： Toshiyuki Imagawa ,  Kazuya Ohara

发明人： Toshiyuki Imagawa ,  Kazuya Ohara

IPC分类号： H03J5/24 ,  H03J7/18 ,  H03J7/28

CPC分类号： H03J7/18 ,  H03J5/246 ,  H03J7/285

摘要： The auto-scan changeover system for a two-band radio receiver employing first and second PLL frequency synthesizers comprises: first detecting circuit responsive to a tuning frequency scanning signal from the first or second PLL frequency synthesizer for detecting completion of a scanning operation of a broadcasting band by first or second auto-scanning circuit; first switching circuit responsive to a detection signal from the first detecting circuit for switching a power supply between first and second broadcasting band reception circuits so as to render one of the reception circuits operative for reception; second detecting circuit for detecting that the first switching circuit switched the power supply to the first or second broadcasting band reception circuit; and second switch responsive to a detection signal from the second detecting circuit for actuating first or second broadcasting band auto-scanning circuit.

摘要翻译： 采用第一和第二PLL频率合成器的双波段无线电接收机的自动扫描切换系统包括：响应来自第一或第二PLL频率合成器的调谐频率扫描信号的第一检测电路，用于检测广播的扫描操作的完成 通过第一或第二自动扫描电路; 第一开关电路响应于来自第一检测电路的检测信号，用于切换第一和第二广播频带接收电路之间的电源，以使接收电路中的一个可操作用于接收; 第二检测电路，用于检测第一开关电路将电源切换到第一或第二广播频带接收电路; 第二开关响应来自第二检测电路的检测信号，用于致动第一或第二广播频带自动扫描电路。

公开(公告)号：US4484356A

公开(公告)日：1984-11-20

申请号：US318547

申请日：1981-11-05

申请人： Michel Geesen ,  Jacques Mourant ,  Daniel P. Ludwig

发明人： Michel Geesen ,  Jacques Mourant ,  Daniel P. Ludwig

IPC分类号： G01R23/16 ,  H03D3/24 ,  H03G3/20 ,  H03J7/28 ,  H04B7/185 ,  H04B1/26 ,  H03L7/18 ,  H04B17/00

CPC分类号： G01R23/16 ,  H03D3/24 ,  H03G3/20 ,  H03J7/285 ,  H04B7/1851

摘要： Apparatus for acquiring and processing incoming radio signals received from a plurality of stations, the frequencies of which are contained in a predetermined frequency band.The received signals are mixed with a local oscillator frequency which is repeatedly scanning the input frequency band at a fast rate produced from a frequency synthesizer whose control input is modified step by step to cycle through a corresponding predetermined set of programming values. The sweep rate of the programming value of the frequency synthesizer is so high that the stabilization time for the frequency at its output is significant with respect to the dwell time of the control signal of each programming value.The varying frequency signals at the output of the mixer are applied to the inputs of band pass filtering channels, to derive the frequency range of the incoming signals for frequency selective circuitry arranged to demodulate the received signals. The invention is useful to the processing messsages transmitted by beacons by a satellite receiver.

摘要翻译： 用于获取和处理从多个站接收的输入无线电信号的装置，其频率包含在预定频带中。 接收的信号与本地振荡器频率混合，该本地振荡器频率以其控制输入逐步修改的频率合成器产生的快速重复扫描输入频带，以循环通过相应的预定编程值集合。 频率合成器的编程值的扫描速率非常高，使得其输出频率的稳定时间相对于每个编程值的控制信号的驻留时间是显着的。 在混频器的输出处的变化的频率信号被施加到带通滤波通道的输入，以导出布置成解调所接收信号的频率选择电路的输入信号的频率范围。 本发明对于由卫星接收机由信标传输的处理消息是有用的。

公开(公告)号：US4306309A

公开(公告)日：1981-12-15

申请号：US116485

申请日：1980-01-29

申请人： Hiroshi Yasuda

发明人： Hiroshi Yasuda

IPC分类号： H03J5/00 ,  H03J5/02 ,  H03J7/28 ,  H04B1/26 ,  H04B1/16

CPC分类号： H03J7/285 ,  H03J5/0281

摘要： In an electronic radio frequency tuner of the type having a source of digital signals representing radio frequencies to which the tuner is tuned and an addressable memory, a memory control circuit includes an addressing circuit having an operative state for selectively providing address-identifying signals which select respective addresses of the memory, a write-in control circuit for writing a digital signal into a selected address of the memory, a further memory for selectively memorizing one of the digital signals from the source and one of the address-identifying signals from the addressing circuit, and a switching circuit for selectively supplying one of the digital signals or one of the address-identifying signals to the further memory in accordance with the state of the addressing circuit.

摘要翻译： 在具有表示调谐器调谐到的无线电频率的数字信号源的类型的电子射频调谐器和可寻址存储器中，存储器控制电路包括具有用于选择性地提供地址识别信号的操作状态的寻址电路，所述寻址电路选择 存储器的相应地址，用于将数字信号写入存储器的选定地址的写入控制电路，用于有选择地存储来自源的数字信号之一和来自寻址的地址识别信号之一的另外的存储器 电路和切换电路，用于根据寻址电路的状态选择性地将数字信号中的一个或地址识别信号中的一个提供给另外的存储器。

公开(公告)号：US4264977A

公开(公告)日：1981-04-28

申请号：US070704

申请日：1979-08-29

申请人： Michael S. Deiss

发明人： Michael S. Deiss

IPC分类号： H03J7/26 ,  H03J7/28 ,  H04B1/16 ,  H04N5/44

CPC分类号： H03J7/26 ,  H03J7/285

摘要： A tuning system for a television receiver includes a phase locked loop (PLL) configuration and an automatic fine tuning (AFT) configuration which are selectively enabled to operate to tune the receiver to nonstandard as well as standard frequency RF carriers which may be provided by cable and master antenna systems. After the selection of a new channel, the operations of the PLL and AFT configurations are sequentially enabled by a mode control apparatus. During the operation of the AFT configuration, an offset detector determines when the frequency of the local oscillator signal is caused to be more than a predetermined offset from its value established during the previous operation of the PLL configuration. In response, the mode control unit reestablishes the operation of the PLL configuration. Channel selection apparatus causes a new channel to be selected after a predetermined number of alternate operating cycles of the two configurations.

摘要翻译： 用于电视接收机的调谐系统包括锁相环（PLL）配置和自动微调（AFT）配置，其被选择性地能够操作以将接收机调谐到非标准以及可以由电缆提供的标准频率RF载波 和主天线系统。 在新频道的选择之后，PLL和AFT配置的操作由模式控制装置依次启用。 在AFT配置的操作期间，偏移检测器确定本地振荡器信号的频率何时比在PLL配置的先前操作期间建立的值的预定偏移大。 作为响应，模式控制单元重新建立PLL配置的操作。 信道选择装置在两个配置的预定数量的替代操作周期之后导致新的信道被选择。

公开(公告)号：US07346133B2

公开(公告)日：2008-03-18

申请号：US10772441

申请日：2004-02-06

申请人： James E. Tatem, Jr.

发明人： James E. Tatem, Jr.

IPC分类号： H04L27/06 ,  H03D3/24

CPC分类号： A61B17/320016 ,  A61B17/3207 ,  A61B2017/320741 ,  A61B2090/033 ,  H03J7/04 ,  H03J7/065 ,  H03J7/22 ,  H03J7/285 ,  H03L7/07 ,  H03L7/0805 ,  H03L7/12 ,  H04L7/033 ,  H04L7/04

摘要： Systems and methods for providing frequency compensation over a wide range of frequency drift are shown. The preferred embodiment utilizes a sweep mode function to provide frequency compensation over a range of frequency drift broader than the frequency drift accommodated by a phase lock loop, without increasing the noise characteristics of the phase lock loop. Accordingly, the preferred embodiment operates in a phase lock loop mode while frequency drift can be compensated for by the lock range of the phase lock loop circuitry. The preferred embodiment operates in sweep mode to step through a range of offset frequencies to position the phase lock loop mode where frequency drift can be compensated for by the lock range of phase lock loop circuitry. Additionally, a preferred embodiment of the present invention includes a drift mode in order to monitor frequency offset information, such as may be used in performing sweep mode functions and/or other control or management functions.

摘要翻译： 示出了在宽频率漂移范围内提供频率补偿的系统和方法。 优选实施例利用扫描模式功能来在比锁相环容纳的频率漂移更宽的频率范围内提供频率补偿，而不增加锁相环的噪声特性。 因此，优选实施例在锁相环模式下工作，同时可以通过锁相环电路的锁定范围补偿频率漂移。 优选实施例以扫描模式操作以跨越偏移频率的范围来定位锁相环模式，其中通过锁相环电路的锁定范围可以补偿频率漂移。 此外，本发明的优选实施例包括漂移模式以便监视频率偏移信息，诸如可用于执行扫描模式功能和/或其他控制或管理功能。

公开(公告)号：US06823031B1

公开(公告)日：2004-11-23

申请号：US09488313

申请日：2000-01-20

申请人： James E. Tatem, Jr.

发明人： James E. Tatem, Jr.

IPC分类号： H03D324

CPC分类号： A61B17/320016 ,  A61B17/3207 ,  A61B2017/320741 ,  A61B2090/033 ,  H03J7/04 ,  H03J7/065 ,  H03J7/22 ,  H03J7/285 ,  H03L7/07 ,  H03L7/0805 ,  H03L7/12 ,  H04L7/033 ,  H04L7/04

摘要： Systems and methods for providing frequency compensation over a wide range of frequency drift are shown. The preferred embodiment utilizes a sweep mode function to provide frequency compensation over a range of frequency drift broader than the frequency drift accommodated by a phase lock loop, without increasing the noise characteristics of the phase lock loop. Accordingly, the preferred embodiment operates in a phase lock loop mode while frequency drift can be compensated for by the lock range of the phase lock loop circuitry. The preferred embodiment operates in sweep mode to step through a range of offset frequencies to position the phase lock loop mode where frequency drift can be compensated for by the lock range of phase lock loop circuitry. Additionally, a preferred embodiment of the present invention includes a drift mode in order to monitor frequency offset information, such as may be used in performing sweep mode functions and/or other control or management functions.

公开(公告)号：US20040155685A1

公开(公告)日：2004-08-12

申请号：US10772441

申请日：2004-02-06

申请人： Harris Broadband Wireless Access, Inc.

发明人： James E. Tatem JR.

IPC分类号： H03L007/06

CPC分类号： A61B17/320016 ,  A61B17/3207 ,  A61B2017/320741 ,  A61B2090/033 ,  H03J7/04 ,  H03J7/065 ,  H03J7/22 ,  H03J7/285 ,  H03L7/07 ,  H03L7/0805 ,  H03L7/12 ,  H04L7/033 ,  H04L7/04

摘要： Systems and methods for providing frequency compensation over a wide range of frequency drift are shown. The preferred embodiment utilizes a sweep mode function to provide frequency compensation over a range of frequency drift broader than the frequency drift accommodated by a phase lock loop, without increasing the noise characteristics of the phase lock loop. Accordingly, the preferred embodiment operates in a phase lock loop mode while frequency drift can be compensated for by the lock range of the phase lock loop circuitry. The preferred embodiment operates in sweep mode to step through a range of offset frequencies to position the phase lock loop mode where frequency drift can be compensated for by the lock range of phase lock loop circuitry. Additionally, a preferred embodiment of the present invention includes a drift mode in order to monitor frequency offset information, such as may be used in performing sweep mode functions and/or other control or management functions.

摘要翻译： 示出了在宽频率漂移范围内提供频率补偿的系统和方法。 优选实施例利用扫描模式功能来在比锁相环容纳的频率漂移更宽的频率范围内提供频率补偿，而不增加锁相环的噪声特性。 因此，优选实施例在锁相环模式下工作，同时可以通过锁相环电路的锁定范围补偿频率漂移。 优选实施例以扫描模式操作以跨越偏移频率的范围来定位锁相环模式，其中通过锁相环电路的锁定范围可以补偿频率漂移。 此外，本发明的优选实施例包括漂移模式以便监视频率偏移信息，诸如可用于执行扫描模式功能和/或其他控制或管理功能。

公开(公告)号：US5710994A

公开(公告)日：1998-01-20

申请号：US697781

申请日：1996-08-29

申请人： Shinichi Shiota

发明人： Shinichi Shiota

IPC分类号： H03J1/00 ,  H03J5/02 ,  H03J7/28 ,  H04B1/18

CPC分类号： H03J1/0075 ,  H03J1/0091 ,  H03J5/0281 ,  H03J7/285

摘要： A synthesizer type receiver where frequency conversion of a received signal is performed by the use of a signal formed in a PLL, and the signal frequency is changed by changing the frequency division ratio of a variable frequency divider in the PLL to thereby change the received frequency. The receiver comprises a detector for detecting reception of a broadcast wave signal; a memory where data areas correspond respectively to a plurality of station selector keys; and a control unit having a data table with a data section relative to frequencies of broadcasting stations receivable in divided areas of the whole area where the receiver is to be used. In a preset mode, the reception frequency band is scanned by changing the frequency of the signal through change of the frequency division ratio, and when the reception frequency at the time of detection of the broadcast wave signal by the detector during the scan is included in the frequency data stored in any preselected divided area, the data relative to the reception frequency is stored in the data area of the memory, and the broadcasting station being currently received is preset in the station selector key corresponding to the data stored area in accordance with the storage.

摘要翻译： 通过使用在PLL中形成的信号来执行接收信号的频率转换的合成器型接收机，并且通过改变PLL中的可变分频器的分频比来改变信号频率，从而改变接收频率 。 接收机包括用于检测广播波信号的接收的检测器; 数据区分别对应于多个站选择键的存储器; 以及具有数据表的控制单元，该数据表具有相对于在接收机将被使用的整个区域的分割区域中可接收的广播站的频率的数据部分。 在预设模式中，通过改变分频比来改变信号的频率来扫描接收频带，并且当扫描期间由检测器检测广播波信号时的接收频率包括在 存储在任何预先选择的划分区域中的频率数据，相对于接收频率的数据被存储在存储器的数据区域中，并且当前接收到的广播站根据与数据存储区域对应的站选择器键预设 存储。