公开(公告)号：US20040124953A1

公开(公告)日：2004-07-01

申请号：US10685704

申请日：2003-10-16

发明人： Tadashi Nakatani ,  Tsutomu Miyashita ,  Yoshio Satoh

IPC分类号： H04B001/26

CPC分类号： H03H9/1071 ,  H03H9/02984 ,  H03H9/6483

摘要： A surface acoustic wave filter includes series-arm resonators and parallel-arm resonators that are connected in a ladder-like fashion. This surface acoustic wave filter satisfies conditions expressed as: 1null106null4null2f02R2CopCosnull3.1null106 where Cop is the electrostatic capacitance of the parallel-arm resonators, Cos is the electrostatic capacitance of the series-arm resonators, f0 is the center frequency, and R is the nominal impedance.

摘要翻译： 表面声波滤波器包括串联臂谐振器和并联臂谐振器，其以梯形方式连接。 该表面声波滤波器满足表示为：1×10 6 <= 4PI 2 f 0 2 R 2 CopCos = 3.1×10 6的条件其中Cop是并联臂谐振器的静电电容，Cos 是串联臂谐振器的静电电容，f0是中心频率，R是额定阻抗。

公开(公告)号：US20040116097A1

公开(公告)日：2004-06-17

申请号：US10729674

申请日：2003-12-05

申请人： IRF SEMICONDUCTOR, INC.

发明人： David H. Shen

IPC分类号： H04B001/26

CPC分类号： H04B1/005 ,  H04B1/28 ,  H04B1/30 ,  H04B1/406

摘要： A multiple frequency RF communications receiver is disclosed which permits greater integration on standard silicon chips and consumes less power than previous receivers. A new method for selecting the various frequency bands with a high amount of isolation and low power consumption is described. Compared to previous receiver implementations, there is no loss of selectivity in the receiver.

摘要翻译： 公开了一种多频RF通信接收机，其允许在标准硅芯片上的更大集成并且消耗比先前的接收机更少的功率。 描述了一种用于选择具有大量隔离和低功耗的各种频带的新方法。 与以前的接收机实现相比，接收机中没有选择性的损失。

公开(公告)号：US20040116095A1

公开(公告)日：2004-06-17

申请号：US10729341

申请日：2003-12-05

申请人： IRF SEMICONDUCTOR, INC.

发明人： David H. Shen

IPC分类号： H04B001/26

CPC分类号： H04B1/30

摘要： The high dynamic range mixer is disclosed which enables wideband frequency translation of radio frequency signals and particularly suited for radio with zero-IF or low-IF receiver architectures, as the dynamic range requirements on the mixers in these radios are particularly severe.

摘要翻译： 公开了高动态范围混频器，其能够实现射频信号的宽带频率转换，并且特别适合于具有零中频或低IF接收机架构的无线电，因为对这些无线电装置中的混频器的动态范围要求特别严格。

公开(公告)号：US20040116085A1

公开(公告)日：2004-06-17

申请号：US10654606

申请日：2003-09-04

申请人： Samsung Electronics Co., Ltd.

发明人： Mi-hyun Son ,  Popov Oleg

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

CPC分类号： H04B1/30

摘要： A direct conversion receiver includes a local oscillator for generating a sinusoid, a mixer for receiving an incoming signal and for mixing the incoming signal with the sinusoid, an analog-to-digital converter for converting the mixed analog signal into a digital signal, and a digital signal processor for outputting the digital signal so that an I-channel signal and a Q-channel signal are output separately and for transmitting to the local oscillator a phase control signal that determines the phase of a sinusoid to be generated by the local oscillator. The direct conversion receiver may further include a low noise amplifier for amplifying the incoming while preventing noise included in the input signal from being amplified, a baseband amplifier for amplifying the mixed analog signal in a baseband, and a baseband low pass filter for removing low frequency noise from a signal amplified by the baseband amplifier.

摘要翻译： 直接转换接收机包括用于产生正弦波的本地振荡器，用于接收输入信号并将输入信号与正弦波混频的混频器，用于将混合模拟信号转换为数字信号的模数转换器，以及 数字信号处理器，用于输出数字信号，使得I信道信号和Q信道信号被单独地输出，并且用于向本地振荡器发送确定由本地振荡器产生的正弦波的相位的相位控制信号。 直接转换接收器还可以包括用于放大输入的低噪声放大器，同时防止输入信号中包括的噪声被放大，用于放大基带中的混合模拟信号的基带放大器和用于去除低频的基带低通滤波器 由基带放大器放大的信号产生的噪声。

公开(公告)号：US20040097213A1

公开(公告)日：2004-05-20

申请号：US10294358

申请日：2002-11-14

发明人： Pierce Joseph Nagle ,  Finbarr Joseph McGrath

IPC分类号： H04B001/26 ,  H04B001/16

CPC分类号： H03F1/0277 ,  H03F1/0266

摘要： Apparatus, method and article of manufacture are shown for linear signal modification. An input signal is modified by providing one or more non-linear current sources and regulating at least one of the one or more current sources to output a signal based on one or more of the input signal characteristics. The modification of the output signal includes both amplification and attenuation.

摘要翻译： 显示了线性信号修改的装置，方法和制造。 通过提供一个或多个非线性电流源并调节一个或多个电流源中的至少一个来输出基于输入信号特性中的一个或多个的信号来修改输入信号。 输出信号的修改包括放大和衰减。

公开(公告)号：US20040092244A1

公开(公告)日：2004-05-13

申请号：US10691986

申请日：2003-10-23

申请人： Research In Motion Limited

发明人： Samuel A. Tiller

IPC分类号： H04B001/26

CPC分类号： H03D7/1433 ,  H03B5/1209 ,  H03B5/1231 ,  H03D7/1441 ,  H03D7/1458 ,  H03D2200/009

摘要： A device for providing the functionality of an oscillator and mixer is disclosed herein. The device uses a differential pair to provide first and second filter networks with a time varying signal. The first filer network generates an oscillating signal through the use of a generated negative resistance and provides the oscillating signal while filtering out unwanted signals. The second filter network receives the time varying input signal and the oscillating signal and provides a mixed output while preventing the transmission of oscillations at the oscillating signal frequency. A double balanced embodiment is also disclosed.

摘要翻译： 本文公开了一种用于提供振荡器和混频器的功能的装置。 该装置使用差分对来为第一和第二滤波器网络提供时变信号。 第一个滤波器网络通过使用产生的负电阻产生振荡信号，并提供振荡信号，同时滤除不需要的信号。 第二滤波器网络接收时变输入信号和振荡信号，并提供混合输出，同时防止在振荡信号频率下的振荡传输。 还公开了双重平衡的实施例。

公开(公告)号：US20040063417A1

公开(公告)日：2004-04-01

申请号：US10260856

申请日：2002-09-30

申请人： D.S.P.C. TECHNOLOGIES LTD.

发明人： Nir Binshtok ,  Boaz Pianka

IPC分类号： H04B001/10 ,  H04B001/26 ,  H04B015/00

CPC分类号： H04B1/30

摘要： DC offset is estimated in a wireless receiver during a period when receive energy is blocked from reaching a mixer within the receiver. The estimated DC offset value may then be used to reduce DC offset within the wireless receiver when a receive signal is subsequently being processed.

摘要翻译： 在接收能量被阻挡到接收机内的混频器的期间，在无线接收机中估计直流偏移。 然后，当接收信号随后被处理时，估计的DC偏移值可用于减少无线接收机内的DC偏移。

公开(公告)号：US20040053595A1

公开(公告)日：2004-03-18

申请号：US10372922

申请日：2003-02-26

发明人： Jiro Shinbo ,  Hirotaka Oosawa ,  Noriyuki Kurakami ,  Masumi Kasahara ,  Robert Astle Henshaw

IPC分类号： H04B001/26 ,  H04B007/00 ,  H04B015/00

CPC分类号： H03L7/10 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1265 ,  H03B2201/025 ,  H03D3/008 ,  H03J1/005 ,  H03J2200/10 ,  H03L7/0891 ,  H03L7/099 ,  H03L7/193

摘要： A communication semiconductor integrated circuit has an oscillator circuit forming part of a transmission PLL circuit fabricated on a single semiconductor chip together with an oscillator circuit forming part of a reception PLL circuit and an oscillator circuit for an intermediate frequency. The oscillator circuit for the transmission PLL circuit is configured to be operable in a plurality of bands. The communication semiconductor integrated circuit also comprises a circuit for measuring the oscillating frequency of the oscillator circuit for the transmission PLL circuit, and a storage circuit for storing the result of measurement made by the measuring circuit. A band to be used by the oscillator circuit for the transmission PLL circuit is determined based on values for setting the oscillating frequencies of the oscillator circuit forming part of the reception PLL circuit and the intermediate frequency oscillator circuit, and the result of measurement stored in the storage circuit.

摘要翻译： 通信半导体集成电路具有形成在单个半导体芯片上的传输PLL电路的一部分的振荡器电路以及形成接收PLL电路的一部分的振荡器电路和用于中频的振荡器电路。 用于传输PLL电路的振荡器电路被配置为可在多个频带中操作。 通信半导体集成电路还包括用于测量用于传输PLL电路的振荡器电路的振荡频率的电路和用于存储由测量电路进行的测量结果的存储电路。 用于传输PLL电路的振荡电路使用的频带基于用于设置构成接收PLL电路和中频振荡器电路的一部分的振荡电路的振荡频率的值和存储在传输PLL电路中的测量结果的值来确定 存储电路。

公开(公告)号：US20040038662A1

公开(公告)日：2004-02-26

申请号：US10224039

申请日：2002-08-20

发明人： Hooman Darabl

IPC分类号： H04B001/26

CPC分类号： H03F1/26 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1483 ,  H03D2200/0043 ,  H03D2200/0084 ,  H03F3/45183 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/45362

摘要： A mixer is disclosed that includes first and second transconductance modules that, in one embodiment, includes MOSFETs configured to receive a plurality of signals that are to be mixed and a selectively coupled auxiliary current source to inject an auxiliary current into the second transconductance module approximately at or near a zero-crossing point in order to reduce flicker noise and other noise introduced into an output signal during switching. Accordingly, as a first transconductance module approaches a zero-crossing, auxiliary current is injected to reduce the current produced therefrom thereby reducing flicker noise. In a differential mixer, the amount of current produced from a transistor pair to which the signal cycle is being switched is also reduced thereby reducing noise from the transistor pair that is turning on for the next portion of a signal cycle.

摘要翻译： 公开了一种混合器，其包括第一和第二跨导模块，其在一个实施例中包括被配置为接收要混合的多个信号的MOSFET，以及选择性耦合的辅助电流源，用于将辅助电流注入到第二跨导模块中 或靠近零交叉点，以便在切换期间减少引入到输出信号中的闪烁噪声和其它噪声。 因此，当第一跨导模块接近零交叉时，辅助电流被注入以减少由此产生的电流从而降低闪烁噪声。 在差分混频器中，从信号周期切换到的晶体管对产生的电流量也减小，从而降低了在信号周期的下一部分导通的晶体管对的噪声。

公开(公告)号：US20040029550A1

公开(公告)日：2004-02-12

申请号：US10630190

申请日：2003-07-30

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Takahiko Kishi

IPC分类号： H04B001/26

CPC分类号： H04L27/364 ,  H04L27/3863 ,  H04L2027/0016

摘要： Radio equipment including a characteristic compensator for compensating for an orthogonality error of a mixer with low consumption power is disclosed. In radio equipment, an orthogonal detector converts a received real signal into a complex reception signal of an intermediate frequency. Further, when a complex reception signal converted into a digital signal by A/D converters includes a desired signal (quasi-desired signal), which includes an image signal of a non-desired signal, and a non-desired signal (preparatory desired signal), which includes an image signal of a desired signal, a frequency of the quasi-desired signal is frequency-converted to a signal closer to a direct current component by a frequency converter and a frequency of the preparatory desired signal is frequency-converted to a signal closer to a direct current component by a frequency converter. A decimator respectively performs a filtering and a down-sampling on the frequency-converted quasi-desired signal and preparatory desired signal. A characteristic compensator 7 suppresses the image signal of the non-desired signal included in an inputted quasi-desired signal by means of a complex codomain signal of an inputted preparatory desired signal.

摘要翻译： 公开了一种包括用于补偿具有低消耗功率的混频器的正交性误差的特征补偿器的无线电设备。 在无线电设备中，正交检波器将接收到的实信号转换为中频的复接收信号。 此外，当由A / D转换器转换成数字信号的复合接收信号包括包含非期望信号的图像信号的期望信号（准期望信号）和非期望信号（预期期望信号 ），其包括期望信号的图像信号，将准期望信号的频率通过频率转换器频率转换为更接近直流分量的信号，并将预期期望信号的频率频率转换为 由变频器接近直流分量的信号。 抽取器分别对频率转换的准期望信号和预备期望信号执行滤波和下采样。 特征补偿器7借助于输入的准备期望信号的复编码域信号来抑制包含在输入的准期望信号中的非期望信号的图像信号。