公开(公告)号：US07538621B2

公开(公告)日：2009-05-26

申请号：US11486706

申请日：2006-07-14

Applicant: Vince Birleson ,  Albert Taddiken ,  Ken Clayton

Inventor： Vince Birleson ,  Albert Taddiken ,  Ken Clayton

IPC: H04N5/44 ,  H04L7/00 ,  H04L1/173 ,  H04B7/00 ,  H04B1/06 ,  H04N5/50

CPC classification number: H03J1/005 ,  H03D7/161 ,  H03J7/065 ,  H03J2200/14 ,  H04N5/4401 ,  H04N5/4446 ,  H04N5/455 ,  H04N5/50 ,  H04N5/52 ,  H04N5/60 ,  H04N21/4263

Abstract: A broadband integrated receiver for receiving input signals and outputting composite video and audio signals is disclosed. The receiver employs an up-conversion mixer and a down-conversion mixer in series to produce an intermediate signal. An intermediate filter between the mixers performs coarse channel selection. The down-conversion mixer may be an image rejection mixer to provide additional filtering.

Abstract translation: 公开了用于接收输入信号并输出​​复合视频和音频信号的宽带集成接收机。 接收机采用上变频混频器和下变频混频器串联产生中间信号。 混合器之间的中间滤波器执行粗通道选择。 下变频混频器可以是镜像抑制混频器以提供额外的滤波。

公开(公告)号：US07397312B2

公开(公告)日：2008-07-08

申请号：US11191434

申请日：2005-07-28

Applicant: John H. Guilford

Inventor： John H. Guilford

IPC: H03L7/00 ,  H04B7/00

CPC classification number: H03J7/065 ,  G01R23/173

Abstract: A spectrum analyzer corrects for internal frequency errors in a reference oscillator using a timing control signal. The reference oscillator provides a reference signal at a reference frequency. An error detection circuit determines an error in the reference frequency using the timing control signal and produces an error correction signal for use by a frequency conversion device in adjusting an output frequency thereof to compensate for the frequency error in the reference frequency.

Abstract translation: 频谱分析仪使用定时控制信号校正参考振荡器中的内部频率误差。 参考振荡器以参考频率提供参考信号。 误差检测电路使用定时控制信号来确定参考频率中的误差，并产生一个纠错信号供频率转换装置调整其输出频率以补偿参考频率中的频率误差。

公开(公告)号：US20070206661A1

公开(公告)日：2007-09-06

申请号：US11569190

申请日：2005-05-24

Applicant: Eiji Okada ,  Yasuteru Asakawa

Inventor： Eiji Okada ,  Yasuteru Asakawa

IPC: A61B1/00

CPC classification number: H03J7/065 ,  A61B1/00016 ,  A61B1/00036 ,  A61B1/041 ,  H03J2200/02

Abstract: A transmission/reception system includes a transmitter and a receiver. The transmitter includes a voltage converter for generating a voltage according to transmission data, a voltage-controlled oscillator for generating a signal of a frequency corresponding to the voltage generated by the voltage converter under non-feedback control, and a first antenna for emitting the signal generated by the voltage-controlled oscillator. The receiver includes a second antenna for receiving the signal emitted from the first antenna, a first amplifier for amplifying the signal received by the second antenna, an oscillator for generating a local oscillation signal, a mixer for mixing the signal amplified by the first amplifier with the local oscillation signal and converting the signal amplified by the first amplifier into an intermediate-frequency (IF) signal, a detector for detecting the IF signal, and a controller for changing a frequency of the local oscillation signal according to the frequency of the received signal, so that the IF signal has a predetermined frequency.

Abstract translation: 发送/接收系统包括发送器和接收器。 发射机包括用于根据传输数据产生电压的电压转换器，用于在非反馈控制下产生与电压转换器产生的电压相对应的频率的信号的压控振荡器和用于发射信号的第一天线 由压控振荡器产生。 接收机包括用于接收从第一天线发射的信号的第二天线，用于放大由第二天线接收的信号的第一放大器，用于产生本地振荡信号的振荡器，用于将由第一放大器放大的信号与 本地振荡信号并将由第一放大器放大的信号转换为中频（IF）信号，用于检测IF信号的检测器，以及用于根据接收到的频率改变本地振荡信号的频率的控制器 信号，使得IF信号具有预定频率。

公开(公告)号：US07212512B2

公开(公告)日：2007-05-01

申请号：US10113743

申请日：2002-04-02

Applicant: L. Victor Lucas ,  Carl F. Andren

Inventor： L. Victor Lucas ,  Carl F. Andren

IPC: H04Q7/24

CPC classification number: H03J7/065

Abstract: A wireless transceiver including an oscillator, a radio, a baseband processor and MAC device that performs apiori frequency offset correction. The radio converts between RF signals and baseband signals. The baseband processor includes a frequency correction loop, an inverter and a combiner. The frequency correction loop generates a frequency offset signal based on a frequency difference between an oscillator reference frequency and frequency of a received signal. The inverter inverts the frequency offset signal and the combiner adjusts frequency of a transmit signal by the inverted frequency offset signal. The MAC processes received packets, identifies packets received from an AP, provides packets to the baseband processor for transmission, and controls the baseband processor to adjust transmit signals to a frequency of the AP. The baseband processor may include a memory or filter to store or update frequency offset values.

Abstract translation: 一种无线收发器，包括执行apiopi频偏校正的振荡器，无线电，基带处理器和MAC设备。 无线电在RF信号和基带信号之间进行转换。 基带处理器包括频率校正回路，逆变器和组合器。 频率校正循环基于振荡器参考频率和接收信号的频率之间的频率差产生频率偏移信号。 逆变器反相频率偏移信号，组合器通过反相频率偏移信号调整发射信号的频率。 MAC处理接收到的分组，识别从AP接收的分组，向基带处理器提供分组以进行传输，并控制基带处理器将发射信号调整到AP的频率。 基带处理器可以包括用于存储或更新频率偏移值的存储器或滤波器。

公开(公告)号：US20070070255A1

公开(公告)日：2007-03-29

申请号：US10530305

申请日：2003-09-18

Applicant: Janardhana Bhat ,  Akbar Syed ,  Teck Leong

Inventor： Janardhana Bhat ,  Akbar Syed ,  Teck Leong

IPC: H04N5/50

CPC classification number: H04N5/50 ,  H03J1/0008 ,  H03J7/065 ,  H03J7/22 ,  H04N5/04 ,  H04N21/4263 ,  H04N21/4384

Abstract: Television systems comprising tuners (1), controllers (2) for controlling tuners (1), and stages (3) for receiving tuned signals from tuners (1) and for supplying control signals to controllers (2), use time-consuming automatic fine tuning signals while high speed tuning. By using lock signals (53) from phase-locked-loops (31) in stages (3) as control signals, an indication whether a channel is active or not can now be got much quicker due to lock signals being much faster available than automatic fine tuning signals. By using synchronization signals (54) from synchronization generators (4) as further control signals, a further indication is got. In a fast tuning mode, frequencies nearby active channels are detected, and in a fine tuning mode, channel frequencies are identified. According to the basic idea, lock signals originating from phase-locked-loops (31) in stages (3) can give first indications whether a channel is active or not, preferably and further advantageously in combination with second indications based upon synchronization signals (54).

Abstract translation: 包括调谐器（1），用于控制调谐器（1）的控制器（2）和用于从调谐器（1）接收调谐信号并用于向控制器（2）提供控制信号）的级（3）的电视系统使用耗时的自动罚款 调谐信号同时进行高速调谐。 通过在阶段（3）中使用来自锁相环（31）的锁定信号（53）作为控制信号，现在可以获得更快的指示，因为锁定信号的可用速度比自动 微调信号。 通过使用来自同步发生器（4）的同步信号（54）作为另外的控制信号，得到进一步的指示。 在快速调谐模式中，检测到有源通道附近的频率，并且在微调模式中，识别通道频率。 根据基本思想，在级（3）中锁定源自锁相环（31）的信号可以给出信道是否有效的第一指示，优选地并且进一步有利地结合基于同步信号的第二指示（54 ）。

公开(公告)号：US20060148421A1

公开(公告)日：2006-07-06

申请号：US11027984

申请日：2005-01-04

Applicant: Patrick Huang ,  Wen-Chang Lee ,  Sen-You Liu

Inventor： Patrick Huang ,  Wen-Chang Lee ,  Sen-You Liu

IPC: H04B1/40

CPC classification number: H04B1/40 ,  H03J7/065 ,  H03J2200/10

Abstract: A method and an apparatus for shifting a resonance frequency in response to an operating frequency are provided. The present invention retrieves a control signal, from a frequency synthesizer, indicative of a difference between the operating frequency and a predetermined frequency, decodes the control signal to generate a tuning signal by looking up a mapping table, and tunes the resonance frequency in response to the tuning signal.

Abstract translation: 提供了一种用于响应于工作频率移动谐振频率的方法和装置。 本发明从频率合成器检索指示操作频率和预定频率之间的差异的控制信号，通过查找映射表来解码控制信号以产生调谐信号，并且响应于 调谐信号。

公开(公告)号：US06684059B1

公开(公告)日：2004-01-27

申请号：US09407643

申请日：1999-09-28

Applicant: Karl E. Moerder

Inventor： Karl E. Moerder

IPC: H04B714

CPC classification number: H04N21/435 ,  G06F11/0757 ,  G06F11/1441 ,  H03J7/065 ,  H03L7/23 ,  H04B1/40 ,  H04B7/18582 ,  H04L7/0029 ,  H04L7/04 ,  H04L27/22 ,  H04L29/06 ,  H04L69/08 ,  H04L69/16 ,  H04L69/161 ,  H04L69/163 ,  H04L69/166 ,  H04L69/168 ,  H04N21/235 ,  H04N21/23614 ,  H04N21/2385 ,  H04N21/4348 ,  H04N21/4381 ,  H04N21/6143 ,  H04N21/64322 ,  H04W28/18

Abstract: A communication system extracts a received modulation frequency from baseband modulation. This frequency is used as a reference to control the output of a variable oscillator. The output of the variable oscillator may be used to generate a transmit upconversion frequency, and may also be used to perform a downconversion from IF to baseband during receive operations.

公开(公告)号：US06643518B1

公开(公告)日：2003-11-04

申请号：US09456658

申请日：1999-12-09

Applicant: Mikko Weckström

Inventor： Mikko Weckström

IPC: H04B1500

CPC classification number: H04L7/06 ,  H03J7/065 ,  H04J3/0685 ,  H04L7/033

Abstract: For synchronous transmission between two telecommunications units, the devices must always be synchronized. Typically, a reference signal is required for synchronization. The reference signal can be transmitted from one unit to another embedded in the data signal. If the data is transmitted via a transmission network modulated in the way required by the network, the reference signal is not always received by the receiver together with the data signal. The problem is solved by this invention by converting the reference signal before its transmission into the transmission network for the frequency band used for transmission in the transmission network.

Abstract translation: 对于两个电信单元之间的同步传输，设备必须始终同步。 通常，同步需要参考信号。 参考信号可以从一个单元发送到嵌入在数据信号中的另一个单元。 如果通过以网络所要求的方式调制的传输网络传输数据，则接收机并不总是接收参考信号与数据信号。 本发明通过将传输前的参考信号转换成传输网络中用于传输的频带的传输网络来解决问题。

公开(公告)号：US20030185158A1

公开(公告)日：2003-10-02

申请号：US10113743

申请日：2002-04-02

Inventor： L. Victor Lucas ,  Carl F. Andren

IPC: H04J001/16

CPC classification number: H03J7/065

Abstract: A wireless transceiver including an oscillator, a radio, a baseband processor and MAC device that performs apiori frequency offset correction. The radio converts between RF signals and baseband signals. The baseband processor includes a frequency correction loop, an inverter and a combiner. The frequency correction loop generates a frequency offset signal based on a frequency difference between an oscillator reference frequency and frequency of a received signal. The inverter inverts the frequency offset signal and the combiner adjusts frequency of a transmit signal by the inverted frequency offset signal. The MAC processes received packets, identifies packets received from an AP, provides packets to the baseband processor for transmission, and controls the baseband processor to adjust transmit signals to a frequency of the AP. The baseband processor may include a memory or filter to store or update frequency offset values.

Abstract translation: 一种无线收发器，包括执行apiopi频偏校正的振荡器，无线电，基带处理器和MAC设备。 无线电在RF信号和基带信号之间进行转换。 基带处理器包括频率校正回路，逆变器和组合器。 频率校正循环基于振荡器参考频率和接收信号的频率之间的频率差产生频率偏移信号。 逆变器反相频率偏移信号，组合器通过反相频率偏移信号调整发射信号的频率。 MAC处理接收到的分组，识别从AP接收的分组，向基带处理器提供分组以进行传输，并控制基带处理器将发射信号调整到AP的频率。 基带处理器可以包括用于存储或更新频率偏移值的存储器或滤波器。

公开(公告)号：US20030176173A1

公开(公告)日：2003-09-18

申请号：US10097314

申请日：2002-03-14

Inventor： Nikolaus Klemmer

IPC: H04B001/18

CPC classification number: H03L7/1976 ,  H03J7/065

Abstract: An Automatic Frequency Control (AFC) circuit for a mobile terminal employs a fractional-N Phase Locked Loop (PLL) to directly reduce errors in the synthesized frequency, such as due to component tolerances, temperature drift, and the like. The frequency error is detected by the average speed of rotation of the I,Q constellation. A corresponding offset is added to the tuning frequency selection word prior to encoding, such as in a nullnull modulator, to generate an effective non-integer PLL frequency division factor over a specified duration. The nullnull modulator may include dithering the different integer values by a pseudo-random number to minimize noise in the output frequency spectrum introduced by the fractional-N division. Component and parameter selection allow a high degree of resolution in frequency control of the fractional-N PLL. By directly controlling for the frequency error, a DAC and XTAL oscillator tuning circuit may be eliminated from the AFC circuit.

Abstract translation: 用于移动终端的自动频率控制（AFC）电路采用分数N锁相环（PLL）来直接减少合成频率中的误差，例如由于部件公差，温度漂移等原因。 频率误差由I，Q星座的平均旋转速度检测。 在编码之前，例如在DELTASIGMA调制器中，将相应的偏移量加到调谐频率选择字上，以在指定的持续时间内产生有效的非整数PLL频率分频因子。 DELTASIGMA调制器可以包括通过伪随机数来抖动不同的整数值以最小化由分数N分频引入的输出频谱中的噪声。 分量和参数选择允许分数N PLL的频率控制中的高度分辨率。 通过直接控制频率误差，可以从AFC电路中消除DAC和XTAL振荡器调谐电路。