公开(公告)号：US20040266385A1

公开(公告)日：2004-12-30

申请号：US10634773

申请日：2003-08-06

发明人： Takeshi Uchitomi ,  Akira Okasaka ,  Robert Astle Henshaw

IPC分类号： H04B001/28 ,  H04B015/00 ,  H04B001/26

CPC分类号： H04B1/30 ,  H03D3/007 ,  H03D2200/0047 ,  H04B1/406

摘要： Receiving properties are greatly improved by varying and outputting an output voltage of I/Q signals, which correspond to an input level in a semiconductor integrated circuit device for baseband processing. When a portable terminals system reaches a training period after power is supplied thereto, a switch is turned on and another switch is turned off and a digital comparator compares an adjustment voltage outputted from an output-voltage adjustment circuit and a reference voltage of a baseband circuit to output comparison results thereof. A control circuit controls and adjusts, based on the comparison results, a voltage-controlled unit so that an adjustment voltage may become nearly equivalent to the reference voltage of the baseband circuit. Thereby the output level of the I signals (, Q signals) outputted from the RF processing unit is corrected, and the output levels of the I signals (, Q signals) are set to be equivalent to that of the reference voltage of the baseband circuit.

摘要翻译： 通过改变和输出与用于基带处理的半导体集成电路器件中的输入电平对应的I / Q信号的输出电压，大大提高了接收特性。 当便携式终端系统在供电之后到达训练期时，开关被接通，另一个开关被关闭，数字比较器将从输出电压调节电路输出的调节电压和基带电路的参考电压进行比较 输出比较结果。 控制电路基于比较结果控制和调整电压控制单元，使得调节电压可能变得几乎等于基带电路的参考电压。 由此，从RF处理单元输出的I信号（，Q信号）的输出电平被校正，I信号（，Q信号）的输出电平被设定为与基带电路的基准电压相同 。

公开(公告)号：US20040253936A1

公开(公告)日：2004-12-16

申请号：US10482506

申请日：2004-07-27

发明人： Martin Simon

IPC分类号： H04B001/26

CPC分类号： H03G3/3047 ,  H03F3/72 ,  H03F2203/7203 ,  H03G3/3042 ,  H04B1/0475

摘要： In a transmission arrangement with power regulation, feedback from an output of a modulator to a digital signal processor is effected via a transmission power detector and an analog/digital converter. The digital signal processor processes baseband signals to be transmitted, and is coupled to the modulator in a transmission path. It is therefore possible to influence the baseband signal amplitudes and/or to program the gain of mixers in the modulator, based on the detected transmission power.

摘要翻译： 在具有功率调节的传输装置中，通过传输功率检测器和模拟/数字转换器实现从调制器的输出到数字信号处理器的反馈。 数字信号处理器处理要发送的基带信号，并且在传输路径中耦合到调制器。 因此，可以基于检测到的发送功率来影响基带信号幅度和/或编码调制器中的混频器的增益。

公开(公告)号：US20040253935A1

公开(公告)日：2004-12-16

申请号：US10459934

申请日：2003-06-12

发明人： Cornell Drentea

IPC分类号： H04B001/26 ,  H04B015/00

CPC分类号： H04B1/28

摘要： An ultra-wideband receiver system includes an intelligent-preselector stage to up-convert received signals to signals within a first IF frequency-range with stepped first oscillation signals, a first down-converting stage to down-convert the signals within the first IF frequency-range to signals within a second IF frequency-range with a fixed second oscillation signal, and a second down-converting stage to down-convert the signals within the second IF frequency-range to signals within a third IF frequency-range with stepped third oscillation signals. The center frequency of the first IF frequency-range may be at least 30% to 35% higher than a highest frequency in the receive-frequency range to provide an image frequency far from (e.g., more than twice) the highest frequency in the receive-frequency range. The receiver may also include a synthesizer to generate the first, second and third oscillation signals with half-integer frequency dividers based on a master reference signal.

摘要翻译： 超宽带接收机系统包括智能预选器级，用于将接收到的信号上变频到具有阶梯式第一振荡信号的第一IF频率范围内的信号，第一下变频级以对第一IF频率内的信号进行下变频 在具有固定的第二振荡信号的第二IF频率范围内的信号，以及第二下变频级，以将第二IF频率范围内的信号下变频到具有阶梯形第三振荡信号的第三IF频率范围内的信号 振荡信号。 第一IF频率范围的中心频率可以比接收频率范围中的最高频率高出至少30％至35％，以提供远离（例如，两倍以上）接收中最高频率的图像频率 -频率范围。 接收机还可以包括合成器，用于基于主参考信号产生具有半整数分频​​器的第一，第二和第三振荡信号。

公开(公告)号：US20040235445A1

公开(公告)日：2004-11-25

申请号：US10442260

申请日：2003-05-21

发明人： Ramon A. Gomez

IPC分类号： H04B001/26 ,  H04B015/00

CPC分类号： H04B1/30

摘要： A radio frequency (RF) tuner includes a programmable tracking filter bank receiving an RF input and outputting a filtered RF signal. A mixer stage receives the filtered RF signal and outputs a first quadrature component of the filtered RF signal and a second quadrature component of the filtered RF signal. Two variable gain amplifiers receive the first and second quadrature components and output amplitude-controlled I and Q components of the filtered RF signal. In one embodiment, the programmable tracking filter bank includes a plurality of tank circuits each connected to the RF input through an impedance. Each tank circuit include an inductor and a capacitor connected in parallel thereby forming an LC network, and a plurality of switched capacitors in parallel with the LC network and switched in and out of the tank circuit by programmable switches. In another embodiment, the programmable tracking filter bank includes a plurality of peaked low-pass circuits each connected to the RF input through an impedance. Each peaked low-pass circuit includes a capacitor connected to ground, and a plurality of switched capacitors in parallel with the capacitor and switched in and out of the peaked low-pass circuit by programmable switches.

摘要翻译： 射频（RF）调谐器包括接收RF输入并输出滤波后的RF信号的可编程跟踪滤波器组。 混频器级接收经过滤波的RF信号并输出​​经滤波的RF信号的第一正交分量和滤波的RF信号的第二正交分量。 两个可变增益放大器接收第一和第二正交分量，并输出滤波后的RF信号的幅度受控的I和Q分量。 在一个实施例中，可编程跟踪滤波器组包括通过阻抗连接到RF输入的多个振荡电路。 每个储能电路包括并联连接的电感器和电容器，从而形成LC网络，以及与LC网络并联的多个开关电容器，并通过可编程开关将其引入和流出储能电路。 在另一个实施例中，可编程跟踪滤波器组包括多个峰值低通电路，每个电路通过阻抗连接到RF输入端。 每个峰值低通电路包括连接到地的电容器和与电容器并联的多个开关电容器，并且通过可编程开关将峰值的低通电路切换进出。

公开(公告)号：US20040229584A1

公开(公告)日：2004-11-18

申请号：US10435959

申请日：2003-05-12

发明人： Georg Fischer ,  Kai-Uwe Ritter

IPC分类号： H04B001/26

CPC分类号： H04B1/30 ,  H03D3/008

摘要： In a telecommunications transmitter and receiver two IQ-mixers of the same type are operated in 180 degrees phase shift. In both the transmitter and receiver, an input signal is coupled to each IQ-mixer and the output signal of the mixers are combined so as to cancel unwanted error components in each individual output signal. In the transmitter, residual carrier signals are cancelled, and in the receiver, DC-offsets are cancelled. In both, the wanted signals are added, doubling the amplitude of the resultant output signal leading to four times more output power and improved dynamic range.

摘要翻译： 在电信发射机和接收机中，相同类型的两个IQ混合器以180度相移操作。 在发送器和接收器中，输入信号耦合到每个IQ混频器，并且混合器的输出信号被组合以便消除每个单独的输出信号中的不期望的误差分量。 在发射机中，残留载波信号被取消，在接收机中取消直流偏置。 在两者中，所需的信号被加入，使输出信号的幅度加倍，导致输出功率的四倍和动态范围的改善。

公开(公告)号：US20040219901A1

公开(公告)日：2004-11-04

申请号：US10850804

申请日：2004-05-21

发明人： Aravind Loke

IPC分类号： H04B001/26

CPC分类号： H04W88/06 ,  H04W36/18

摘要： A wireless communications device includes an antenna that receives a first signal at a first frequency and a second signal at a second frequency and converts the first and second signals into a composite signal. A first oscillator outputs a first oscillator signal at a first frequency and a second oscillator outputs a second oscillator signal at a second frequency. A demodulator receives the composite signal and the first and second oscillator signals. The oscillator signals are selected so that the demodulator generates a low frequency signal with components of the first and second signals occupying a common frequency band. The wireless communications device allows executing a nullSoft Handoffnull even when the first and second frequencies are different.

摘要翻译： 无线通信设备包括天线，其以第一频率接收第一信号，并以第二频率接收第二信号，并将第一和第二信号转换为复合信号。 第一振荡器以第一频率输出第一振荡器信号，而第二振荡器以第二频率输出第二振荡器信号。 解调器接收复合信号和第一和第二振荡器信号。 选择振荡器信号，使得解调器产生具有第一和第二信号的分量占据公共频带的低频信号。 即使第一和第二频率不同，无线通信设备允许执行“软切换”。

公开(公告)号：US20040209590A1

公开(公告)日：2004-10-21

申请号：US10417881

申请日：2003-04-16

发明人： Tim Forrester ,  Allen Tran

IPC分类号： H04B001/26

CPC分类号： H04B1/406 ,  H04B1/48 ,  H04B1/52

摘要： A wireless communication device comprises a plurality of receive signal paths, each of the receive signal paths is configured to receive signals in a certain frequency bandwidth. The communication device also comprises an amplifier coupled with each of the plurality of receive signal paths. The amplifier is configured to amplify the receive signals associated with each of the plurality of receive signal paths.

摘要翻译： 无线通信设备包括多个接收信号路径，每个接收信号路径被配置为以特定频率带宽接收信号。 通信设备还包括与多个接收信号路径中的每一个耦合的放大器。 放大器被配置为放大与多个接收信号路径中的每一个相关联的接收信号。

公开(公告)号：US20040205827A1

公开(公告)日：2004-10-14

申请号：US10412962

申请日：2003-04-14

发明人： Andrew W. Krone

IPC分类号： H04N007/173 ,  H04B001/06 ,  H04N007/20 ,  H04N005/62 ,  H04N005/50 ,  H04B015/00 ,  H04B001/26 ,  H04B007/00 ,  H04N007/16

CPC分类号： H04N7/20 ,  H03J1/0041

摘要： A multi-stage channel select filter and associated methods are disclosed that can be used, for example, with receiver architectures and associated methods that are also described herein. The multi-stage channel select filter can include a plurality of cascaded stages including at least one tunable stage. Each stage can include a digital mixer, a low pass filter and a decimator, with the decimator for each tunable stage including a tunable decimator having a decimation rate selection signal as an input. In addition, each non-tunable stage, if any are utilized, can include a decimator having a fixed decimation rate. In operation, the first cascaded stage is configured to receive a digitized channel signal spectrum, and the last cascaded change is configured to output a baseband signal representative of a desired channel within the digitized channel spectrum. In addition, receiver architectures and associated methods are disclosed that utilize coarse analog tune circuitry to provide initial analog coarse tuning of desired channels within a received spectrum signal, such as a set-top box signal spectrum for satellite communications.

摘要翻译： 公开了一种多级信道选择滤波器和相关联的方法，其可以用于例如本文中描述的接收机架构和相关联的方法。 多级通道选择滤波器可以包括多个级联级，包括至少一个可调谐级。 每个级可以包括数字混频器，低通滤波器和抽取器，每个可调谐级的抽取器包括具有抽取速率选择信号作为输入的可调抽取器。 另外，每个非可调谐级（如果有的话）被使用，可以包括具有固定抽取率的抽取器。 在操作中，第一级联级被配置为接收数字化的信道信号频谱，并且最后的级联改变被配置为输出表示数字化信道频谱内的期望信道的基带信号。 此外，公开了接收机架构和相关方法，其利用粗略的模拟调谐电路来提供接收频谱信号（例如用于卫星通信的机顶盒信号频谱）内的期望信道的初始模拟粗调。

公开(公告)号：US20040142701A1

公开(公告)日：2004-07-22

申请号：US10345604

申请日：2003-01-16

申请人： Charles Abraham to Global Locate, Inc.

发明人： Charles Abraham

IPC分类号： H04B001/18 ,  H04B001/26

CPC分类号： H04B1/403 ,  G01S19/235 ,  H03J7/04 ,  H03J2200/11 ,  H04B1/3805

摘要： A method and apparatus for using a conventional oscillator in a cellular telephone transceiver as a source of a reference signal for a GPS receiver. In one embodiment, the method comprises using a voltage-controlled oscillator (nullVCXOnull) within a cellular telephone transceiver to generate a reference frequency signal for the GPS receiver. Circuitry within the telephone transceiver generates a frequency error signal. Both of these signals are coupled to GPS circuitry and used to control a carrier numerically controlled oscillator (nullNCOnull) and a code NCO. The NCOs produce a tuning signal and a timing signal, respectively. The GPS circuitry uses the NCO generated signals to process GPS signals.

摘要翻译： 一种在蜂窝电话收发机中使用常规振荡器作为GPS接收机的参考信号源的方法和装置。 在一个实施例中，该方法包括在蜂窝电话收发器内使用压控振荡器（“VCXO”）来产生用于GPS接收器的参考频率信号。 电话收发器内的电路产生频率误差信号。 这两个信号耦合到GPS电路并用于控制载波数控振荡器（“NCO”）和代码NCO。 NCO分别产生调谐信号和定时信号。 GPS电路使用NCO生成的信号来处理GPS信号。

公开(公告)号：US20040137871A1

公开(公告)日：2004-07-15

申请号：US10722845

申请日：2003-11-25

申请人： Infineon Technologies North America Corp., a Delaware corporation

发明人： Brian J. McNamara ,  Heinz Banzer ,  Ludger Verweyen

IPC分类号： H04B001/26

CPC分类号： H03D7/125

摘要： A dual band mixer has a common node for at least one radio frequency input and an intermediate frequency output. The dual band mixer also has a first transistor with a gate coupled to a first local oscillator input and a drain coupled to the common node, and a second transistor with a gate coupled to a second local oscillator input and a drain coupled to the common node. Interconnection circuitry turns off the second transistor when the first local oscillator input signal is applied to the first transistor, and turns off the first transistor when the second local oscillator input signal is applied to the second transistor.

摘要翻译： 双频带混频器具有用于至少一个射频输入和中频输出的公共节点。 双频带混频器还具有第一晶体管，其栅极耦合到第一本地振荡器输入端和耦合到公共节点的漏极，第二晶体管具有耦合到第二本地振荡器输入端的栅极和耦合到公共节点的漏极 。 当第一本地振荡器输入信号施加到第一晶体管时，互连电路关闭第二晶体管，并且当第二本机振荡器输入信号施加到第二晶体管时，互连电路关断第一晶体管。