公开(公告)号：US07454176B2

公开(公告)日：2008-11-18

申请号：US11360427

申请日：2006-02-24

申请人： Toshiya Uozumi ,  Ikuya Ono ,  Jiro Shinbo

发明人： Toshiya Uozumi ,  Ikuya Ono ,  Jiro Shinbo

IPC分类号： H04B1/40

CPC分类号： H04B1/40 ,  H04B1/006 ,  H04B1/0071 ,  H04B1/0082

摘要： The present invention provides a semiconductor integrated circuit for communication (RF IC) operable in a mode for receiving a received signal subjected to phase modulation and amplitude modulation and a mode for receiving a received signal subjected only to phase modulation. In the semiconductor integrated circuit for communication, a frequency band of a loop filter in a PLL circuit is switched and set so as to become large in a reception mode and become small in a transmission mode.

摘要翻译： 本发明提供一种用于通信（RF IC）的半导体集成电路，其可以用于接收经受相位调制和幅度调制的接收信号的模式和用于接收仅进行相位调制的接收信号的模式。 在用于通信的半导体集成电路中，PLL电路中的环路滤波器的频带被切换并设置成在接收模式下变大并且在传输模式下变小。

公开(公告)号：US07444167B2

公开(公告)日：2008-10-28

申请号：US11149230

申请日：2005-06-10

申请人： Sheng-Fuh Chang ,  Wen-Lin Chen ,  Cheng-Hua Tsai ,  Chin-Hung Chien ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

发明人： Sheng-Fuh Chang ,  Wen-Lin Chen ,  Cheng-Hua Tsai ,  Chin-Hung Chien ,  Hung-Cheng Chen ,  Shu-Fen Tang ,  Albert Chen

IPC分类号： H04Q7/32

CPC分类号： H04B1/0071 ,  H04B1/0082

摘要： The present invention discloses a dual-band RF transceiver. The transceiver comprises a first module, used as the RF front-end of the dual-band transceiver and used for receiving and transmitting a first RF signal and a second RF signal; a second module, electrically connected to the first module, used as the IF IQ modulator/demodulator of the dual-band RF transceiver; a third module, electrically connected to the first and the second modules, used as the tripe-band phase-locked frequency synthesizer of the dual-band RF transceiver and used for providing a first local oscillating signal and a second local oscillating signal to the first module, and a third local oscillating signal to the second module. The dual-band RF transceiver according to the present invention realizes the dual-band triple-mode operation of IEEE802.11 a/b/g by a single dual-band RF module, and therefore the circuit size, power dissipation, component count, and cost can be dramatically reduced.

摘要翻译： 本发明公开了一种双频RF收发器。 收发器包括用作双频带收发器的RF前端并用于接收和发送第一RF信号和第二RF信号的第一模块; 电连接到第一模块的第二模块，用作双频RF收发器的IF IQ调制器/解调器; 电连接到第一和第二模块的第三模块，用作双频带RF收发器的三频带锁相频率合成器，用于向第一和第二模块提供第一本地振荡信号和第二本地振荡信号 模块和第三本地振荡信号发送到第二模块。 根据本发明的双频RF收发器通过单个双频RF模块实现IEEE802.11a / b / g的双频三模操作，因此电路尺寸，功耗，组件数， 并且成本可以大大降低。

公开(公告)号：US07392026B2

公开(公告)日：2008-06-24

申请号：US11098490

申请日：2005-04-04

申请人： Mohammed S. Alam ,  Daniel L. Kaczman

发明人： Mohammed S. Alam ,  Daniel L. Kaczman

IPC分类号： H04B1/06

CPC分类号： H04B1/0082 ,  H04B1/0057 ,  H04B1/30

摘要： A multi-band high gain mixer and quadrature signal generator allows a receiver system to receive signals at multiple frequency bands without requiring significant hardware duplication. A single mixer directly receives any of three communication frequency bands such as Universal Mobile Telecommunication System (UMTS), Personal Communication Services (PCS), Digital Communication System (DCS), and Japan and US W-CDMA 800 bands without amplification. A Serial-Parallel Interface selectably forwards RF signals within the receiver's frequency channels to the mixer for demodulation into in-phase (I) and quadrature (Q) signals at a common IF output from the multi-mode receiver. Significant power and cost advantages are attained by elimination of duplicate mixers and amplifier stages.

摘要翻译： 多频带高增益混频器和正交信号发生器允许接收机系统以多个频带接收信号，而不需要显着的硬件复制。 单个混频器直接接收诸如通用移动电信系统（UMTS），个人通信服务（PCS），数字通信系统（DCS），日本和美国的W-CDMA 800频带的三个通信频带中的任何一个，无需放大。 串行并行接口可选择地将接收机频率信道内的RF信号转发到混频器，以在多模接收机的公共IF输出端解调成同相（I）和正交（Q）信号。 通过消除重复的混频器和放大器级可以实现显着的功率和成本优势。

公开(公告)号：US20080125060A1

公开(公告)日：2008-05-29

申请号：US11428597

申请日：2006-07-05

申请人： Jyh-Fong Lin ,  Jung-Chang Liu ,  Peir-Weir Chen ,  Ying-Che Tseng ,  Did-Min Shih

发明人： Jyh-Fong Lin ,  Jung-Chang Liu ,  Peir-Weir Chen ,  Ying-Che Tseng ,  Did-Min Shih

IPC分类号： H04B1/00

CPC分类号： H04B1/0082

摘要： A wireless communication device. The wireless communication device comprises first and second programmable frequency dividers, a mixer, a modulator, a phase detector, and a variable controlled oscillator. The first programmable frequency divider divides the frequency of a reference signal by a factor N to generate a modulating signal. The second programmable frequency divider divides the reference signal by a factor M and outputs a frequency-divided signal. The facts N and M are positive integers. The mixer down-converting a transmission signal according the divided signal and outputs a translation-loop signal. The modulator modulates the modulating signal with baseband signals, and outputs a comparison signal. The phase detector detects a phase difference between the comparison signal and the translation-loop signal. The variable controlled oscillator modifies the transmission signals according to an output of the phase detector.

摘要翻译： 无线通信设备。 无线通信设备包括第一和第二可编程分频器，混频器，调制器，相位检测器和可变控制振荡器。 第一可编程分频器将参考信号的频率除以因子N以产生调制信号。 第二可编程分频器将参考信号除以因子M并输出分频信号。 事实N和M是正整数。 混频器根据分频信号对传输信号进行下变频转换，并输出平移环路信号。 调制器用基带信号调制调制信号，并输出比较信号。 相位检测器检测比较信号和平移环路信号之间的相位差。 可变控制振荡器根据相位检测器的输出修改发送信号。

公开(公告)号：US20080113641A1

公开(公告)日：2008-05-15

申请号：US11734435

申请日：2007-04-12

申请人： Chan-young Jeong ,  Chang-sik Yoo ,  Jin-soo Park ,  Heung-bae Lee ,  Young-eil Kim

发明人： Chan-young Jeong ,  Chang-sik Yoo ,  Jin-soo Park ,  Heung-bae Lee ,  Young-eil Kim

IPC分类号： H04B1/26 ,  H04B15/00

CPC分类号： H04B1/0082

摘要： A radio communication apparatus and a frequency generating method thereof the communication apparatus including a frequency generator to generate a plurality of local oscillator (LO) frequencies; and a mixer to convert a frequency of an input signal by mixing the input signal with at least two of the LO frequencies generated by the frequency generator. As the LO frequencies are generated using the single VCO to support the radio communication standard of the multiple bands, the circuit area can be reduced and the multimode and multiband can be supported with one chip.

摘要翻译： 一种无线电通信装置及其频率产生方法，该通信装置包括频率发生器以产生多个本地振荡器（LO）频率; 以及混频器，用于通过将输入信号与由频率发生器产生的至少两个LO频率进行混合来转换输入信号的频率。 由于使用单个VCO产生LO频率以支持多个频带的无线电通信标准，所以可以减少电路面积，并且可以通过一个芯片来支持多模和多频带。

公开(公告)号：US07356325B2

公开(公告)日：2008-04-08

申请号：US11173043

申请日：2005-07-01

申请人： Arya Reza Behzad ,  Hooman Darabi

发明人： Arya Reza Behzad ,  Hooman Darabi

IPC分类号： H04B1/26 ,  H04B1/28 ,  H04M1/00

CPC分类号： H04B1/0082

摘要： Local oscillation circuitry for use in an RF transceiver Integrated Circuit (IC) includes local oscillation generation circuitry operable to produce a local oscillation and local oscillation distribution circuitry. The local oscillation distribution circuitry includes a splitting circuit, a first distribution portion, and a second distribution portion. The splitting circuit receives the local oscillation and produces multiple copies of the local oscillation. The first distribution portion produces a first local oscillation corresponding to a first RF band and a second local oscillation corresponding to a second RF band based and to provide the first local oscillation and the second local oscillation to a first RF transceiver group. The second distribution portion produces a first local oscillation and a second local oscillation and provides the first local oscillation and the second local oscillation to the second RF transceiver group.

摘要翻译： 用于RF收发器的本地振荡电路集成电路（IC）包括可操作以产生本地振荡和本地振荡分配电路的本地振荡发生电路。 本地振荡分配电路包括分离电路，第一分配部分和第二分配部分。 分离电路接收本地振荡并产生本地振荡的多个副本。 第一分配部分产生对应于第一RF频带的第一本地振荡和对应于第二RF频带的第二本地振荡，并且向第一RF收发机组提供第一本地振荡和第二本地振荡。 第二分配部分产生第一本地振荡和第二本地振荡，并将第一本地振荡和第二本地振荡提供给第二RF收发器组。

公开(公告)号：US20070173286A1

公开(公告)日：2007-07-26

申请号：US11703421

申请日：2007-02-06

申请人： Keith Carter ,  Arya Behzad

发明人： Keith Carter ,  Arya Behzad

IPC分类号： H04B1/44 ,  H04M1/00

CPC分类号： H04B1/0082 ,  H04M2250/02 ,  H04M2250/06 ,  H04W88/00

摘要： A Radio Frequency (RF) transceiver Integrated Circuit (IC) includes a plurality -of RF transceivers, local oscillation generation circuitry that produces a local oscillation, and local oscillation distribution circuitry. The local oscillation distribution circuitry couples to the local oscillation generation circuitry and includes a plurality of local oscillation repeater circuits. Each local oscillation repeater circuit corresponds to a respective one of the plurality of RF transceivers (transmitter, receiver, or both) Each local oscillation repeater circuit includes a local oscillation repeater circuit input, a local oscillation repeater circuit interface driver output coupled to respective one of the plurality of RF transceivers, and a local oscillation repeater circuit output. Each local oscillation repeater circuit also includes a first driver having as an input the local oscillation repeater circuit input and as an output the local oscillator repeater circuit output and a second driver having as an input the local oscillation repeater circuit input and as an output the local oscillation repeater circuit interface driver output.

摘要翻译： 射频（RF）收发器集成电路（IC）包括多个RF收发器，产生本地振荡的本地振荡发生电路和本地振荡分配电路。 本地振荡分配电路耦合到本地振荡发生电路并且包括多个本地振荡中继器电路。 每个本地振荡中继器电路对应于多个RF收发器（发射机，接收机或两者）中的相应一个。每个本地振荡中继器电路包括本地振荡中继器电路输入，本地振荡中继器电路接口驱动器输出耦合到相应的一个 多个RF收发器和本地振荡中继器电路输出。 每个本地振荡中继器电路还包括第一驱动器，其具有作为本地振荡中继器电路输入的输入和作为本地振荡器中继器电路输出的输出，以及具有作为本地振荡中继器电路输入的输入的第二驱动器和作为输出的本地振荡器 振荡中继器电路接口驱动器输出。

公开(公告)号：US20070117532A1

公开(公告)日：2007-05-24

申请号：US11463634

申请日：2006-08-10

申请人： Bonkee Kim ,  Bo-Eun Kim

发明人： Bonkee Kim ,  Bo-Eun Kim

IPC分类号： H04H1/00 ,  H04B1/16

CPC分类号： H03J1/005 ,  H04B1/0064 ,  H04B1/0082 ,  H04B1/30 ,  H04H40/18 ,  H04H2201/11 ,  H04H2201/20

摘要： Provided is a terrestrial-digital multimedia broadcasting (T-DMB) and digital audio broadcasting (DAB) low intermediate frequency (IF) receiver. A T-DMB and DAB low IF receiver comprises a low noise amplifier (LNA), an image rejection down-conversion mixer, a low pass filter, an amplifier, a local oscillator, and a phase-locked loop. Particularly, the LNA, the image rejection down-conversion mixer, the low pass filter, the amplifier, the local oscillator, and the phase-locked loop are integrated in a monolithic semiconductor integrated circuit substrate. Using the T-DMB and DAB low IF receiver allows a removal of a conventional SAW filter and the T-DMB and DAB low IF receiver can be easily integrated in the monolithic semiconductor integrated circuit substrate, and manufactured at low costs.

摘要翻译： 提供了地面数字多媒体广播（T-DMB）和数字音频广播（DAB）低中频（IF）接收机。 T-DMB和DAB低中频接收机包括低噪声放大器（LNA），镜像抑制下变频混频器，低通滤波器，放大器，本地振荡器和锁相环。 特别地，LNA，图像抑制下变频混频器，低通滤波器，放大器，本地振荡器和锁相环集成在单片半导体集成电路基板中。 使用T-DMB和DAB低IF接收器可以去除传统的SAW滤波器，而T-DMB和DAB低IF接收器可以轻松集成在单片半导体集成电路基板中，并以低成本制造。

公开(公告)号：US07079596B1

公开(公告)日：2006-07-18

申请号：US09535303

申请日：2000-03-24

申请人： Yasuaki Namura

发明人： Yasuaki Namura

IPC分类号： H04L27/22

CPC分类号： H03D7/166 ,  H04B1/0082

摘要： A quadrature demodulator 408′ and a quadrature modulator 908′ convert a reception intermediate frequency signal 151 into reception baseband signals 157 and 158, and also convert transmission baseband signals 657 and 658 into a transmission intermediate frequency signal 651, respectively. While local oscillation signals having frequencies suitable for the respective bands are outputted from a commonly used local oscillator 111, such a local oscillation signal obtained by shifting a phase thereof π/2 by a phase shifter 412 is supplied to one mixer of quadrature mixers 109 and 609, and such a signal obtained by inverting, or not inverting the plurality of the local oscillation signal by an exclusive OR gate circuit 413 in response to a band switching signal 153 is supplied to the other mixer of quadrature mixers 110 and 610.

摘要翻译： 正交解调器408'和正交调制器908'将接收中频信号151转换为接收基带信号157和158，并且还将发送基带信号657和658分别转换为发送中频信号651。 虽然具有适合于各个频带的频率的本地振荡信号从常用的本地振荡器111输出，但是通过移相器412将其相位pi / 2移相而获得的本地振荡信号被提供给正交混频器109和 609，并且通过异或门电路413响应于频带切换信号153反相或不反相多个本地振荡信号而获得的信号被提供给正交混频器110和610的另一个混频器。

公开(公告)号：US20060094374A1

公开(公告)日：2006-05-04

申请号：US11301012

申请日：2005-12-12

申请人： John Olip

发明人： John Olip

IPC分类号： H04B1/40 ,  H04B7/00

CPC分类号： H03L7/185 ,  H03L2207/12 ,  H04B1/0075 ,  H04B1/0082

摘要： A phase locked loop (PLL) frequency synthesizer to produce a local oscillator signal for a transmitter for operation at a plurality of RF frequency bands that are disparate. The transmitter has an intermediate frequency that is a sizable fraction of the bandwidth of one or more of the RF bands. The transmitter includes at least one RF upconverter, each having a local oscillator input coupled to the frequency synthesizer.