公开(公告)号：WO2005104380A3

公开(公告)日：2007-02-01

申请号：PCT/US2005013000

申请日：2005-04-18

Applicant: TEXAS INSTRUMENTS INC ,  MUHAMMAD KHURRAM ,  STASZEWSKI ROBERT B ,  LEIPOLD DIRK

Inventor： MUHAMMAD KHURRAM ,  STASZEWSKI ROBERT B ,  LEIPOLD DIRK

IPC: H04B1/69 ,  H03D7/18 ,  H03H19/00 ,  H04B1/16 ,  H04B1/28

CPC classification number: H03D7/18 ,  H03H19/004 ,  H03H2007/0192

Abstract: Disclosed are methods, circuits and systems for image reject filtering in a multi-tap direct sampling mixer (MTDSM) of an IF or RF system. Disclosed is the use of rotating capacitors among the in-phase and quadrature branches of a signal processing system. The exchange of information among the branches of the I and Q channels is used in the implementation of a complex filter. Rotation of a switched capacitor C R between the I and Q channels of the circuit causes a sharing of the charge among the four paths, I+, I-, Q+, Q-, resulting in a direct sampling and a complex filtering arrangement (10). The preferred embodiment of the filter (10) shown can be seen to have four sub-circuits (12, 14, 16, 18), which may be understood as single-pole IIR filters. Embodiments using cascaded multiple stages of the complex filter to provide higher order complex filters are also disclosed.

Abstract translation: 公开了用于IF或RF系统的多抽头直接采样混频器（MTDSM）中的图像抑制滤波的方法，电路和系统。 公开了在信号处理系统的同相和正交分支中使用旋转电容器。 在I和Q通道的分支之间的信息交换用于实现复杂的过滤器。 电路的I和Q通道之间的开关电容C R R的旋转导致四个路径I +，I，Q +，Q-之间的电荷共享，导致直接采样和 复杂的滤波装置（10）。 可以看出所示滤波器（10）的优选实施例具有四个子电路（12,14,16,18），其可被理解为单极IIR滤波器。 还公开了使用复合滤波器的级联多级以提供更高阶复数滤波器的实施例。

公开(公告)号：WO2004034572A1

公开(公告)日：2004-04-22

申请号：PCT/US2003/031857

申请日：2003-10-08

Applicant: TEXAS INSTRUMENTS INCORPORATED ,  MUHAMMAD, Khurram ,  STASZEWSKI, Robert, B. ,  FEYGIN, Gennady

Inventor： MUHAMMAD, Khurram ,  STASZEWSKI, Robert, B. ,  FEYGIN, Gennady

IPC: H03F1/26

CPC classification number: H03D7/125 ,  H04B1/1036

Abstract: When a sample stream is decimated, frequency components from outside of a desired frequency band are aliased into the desired band, causing interference and loss of information. Different decimating ratios result in different frequencies aliasing into the desired frequency band. A current-mode sampling mixer (800) with capacitor banks (811) and (812) that are controlled by a digital control unit (820) with a capability to integrate and decimate an RF current at different decimating ratios is able to measure the frequency spectrum with different decimating ratios. The measured frequency spectrum is then analyzed to detect the presence of interferers aliased into the desired frequency band. The interferers can then be eliminated or avoided.

Abstract translation: 当采样流被抽取时，来自期望频带外部的频率分量被混叠成所需频带，导致信息的干扰和丢失。 不同的抽取率导致不同的频率混叠成所需的频带。 具有由数字控制单元（820）控制的电容器组（811）和（812）的电流模式采样混频器（800）具有以不同抽取率对RF电流进行积分和抽取的能力，能够测量频率 频谱具有不同的抽取率。 然后分析测量的频谱以检测混叠到期望频带的干扰源的存在。 然后可以消除或避免干扰源。

公开(公告)号：WO2006033722A3

公开(公告)日：2006-03-30

申请号：PCT/US2005/028569

申请日：2005-08-12

Applicant: TEXAS INSTRUMENTS INCORPORATED ,  ELIEZER, Oren, E. ,  CRUISE, Francis, P. ,  STASZEWSKI, Robert, B.

Inventor： ELIEZER, Oren, E. ,  CRUISE, Francis, P. ,  STASZEWSKI, Robert, B.

IPC: H04L27/00 ,  H04L25/03 ,  H04L27/20 ,  H03C3/00

Abstract: Apparatus and method for a fully digital quadrature architecture for a complex modulator. The complex modulator can substitute for existing prior art analog quadrature modulator structures and those based on a digital polar architecture (r, θ). The complex modulator (110) comprises an I switch array (120), Q switch array (112) and matching network (114). The modulator effectively operates as a complex digital-to-analog converter where the digital inputs are given in Cartesian form, namely I and Q representing the complex number I + jQ, while the output is a modulated RF signal having a corresponding amplitude and phase shift. The phase shift being with respect to a reference phase dictated by the local oscillator, which is also input to the converter/modulator. Several embodiments are provided including modulators incorporating dual I and Q transistor arrays, a single shared I/Q transistor array, modulators with single ended and differential outputs and modulators with single and dual polarity clock and I/Q data signals.

公开(公告)号：WO2006033722A2

公开(公告)日：2006-03-30

申请号：PCT/US2005028569

申请日：2005-08-12

Applicant: TEXAS INSTRUMENTS INC ,  ELIEZER OREN E ,  CRUISE FRANCIS P ,  STASZEWSKI ROBERT B

Inventor： ELIEZER OREN E ,  CRUISE FRANCIS P ,  STASZEWSKI ROBERT B

IPC: H04K1/02

CPC classification number: H03F3/24 ,  H03C3/40 ,  H03C5/00 ,  H03F2200/324 ,  H03F2200/331 ,  H03F2200/336 ,  H04K1/02 ,  H04L27/04 ,  H04L27/2092 ,  H04L27/365

Abstract: Apparatus and method for a fully digital quadrature architecture for a complex modulator. The complex modulator can substitute for existing prior art analog quadrature modulator structures and those based on a digital polar architecture (r, ?). The complex modulator (110) comprises an I switch array (120), Q switch array (112) and matching network (114). The modulator effectively operates as a complex digital-to-analog converter where the digital inputs are given in Cartesian form, namely I and Q representing the complex number I + jQ, while the output is a modulated RF signal having a corresponding amplitude and phase shift. The phase shift being with respect to a reference phase dictated by the local oscillator, which is also input to the converter/modulator. Several embodiments are provided including modulators incorporating dual I and Q transistor arrays, a single shared I/Q transistor array, modulators with single ended and differential outputs and modulators with single and dual polarity clock and I/Q data signals.

Abstract translation: 用于复数调制器的全数字正交架构的装置和方法。 复调制器可以替代现有的现有技术的模拟正交调制器结构和基于数字极坐标结构（r，θ）的结构。 复调制器（110）包括I开关阵列（120），Q开关阵列（112）和匹配网络（114）。 调制器有效地作为复数数模转换器工作，其中数字输入以笛卡尔形式给出，即I和Q表示复数I + jQ，而输出是具有对应幅度和相移的调制RF信号 。 相移相对于由本地振荡器指定的参考相位，本地振荡器也被输入到转换器/调制器。 提供了包括具有双I和Q晶体管阵列的调制器，单个共享I / Q晶体管阵列，具有单端和差分输出的调制器以及具有单极性和双极性时钟和I / Q数据信号的调制器的几个实施例。

公开(公告)号：WO2005086759A2

公开(公告)日：2005-09-22

申请号：PCT/US2005/007326

申请日：2005-03-07

Applicant: TEXAS INSTRUMENTS INCORPORATED ,  STASZEWSKI, Robert, B. ,  LEIPOLD, Dirk

Inventor： STASZEWSKI, Robert, B. ,  LEIPOLD, Dirk

IPC: H04L27/04

CPC classification number: H03J7/047 ,  H03C3/0941 ,  H03C3/095 ,  H03C3/0966 ,  H03L1/00 ,  H03L2207/50

Abstract: A mobile device includes frequency synthesizer circuitry (44) for generating a channel frequency at a multiple of a reference frequency. The reference frequency is generated by a free-running crystal oscillator (72), without frequency stabilization circuitry. Variations in the output of the crystal oscillator (72) are compensated by adjusting the multiplication factor of the frequency synthesizer.

Abstract translation: 移动设备包括用于以参考频率的倍数产生频道频率的频率合成器电路（44）。 参考频率由自由运行的晶体振荡器（72）产生，没有频率稳定电路。 通过调整频率合成器的乘法因子来补偿晶体振荡器（72）的输出的变化。

公开(公告)号：WO2005086759A3

公开(公告)日：2006-10-05

申请号：PCT/US2005007326

申请日：2005-03-07

Applicant: TEXAS INSTRUMENTS INC ,  STASZEWSKI ROBERT B ,  LEIPOLD DIRK

Inventor： STASZEWSKI ROBERT B ,  LEIPOLD DIRK

IPC: H04L7/00 ,  H04L27/04

CPC classification number: H03J7/047 ,  H03C3/0941 ,  H03C3/095 ,  H03C3/0966 ,  H03L1/00 ,  H03L2207/50

Abstract: A mobile device includes frequency synthesizer circuitry (44) for generating a channel frequency at a multiple of a reference frequency. The reference frequency is generated by a free-running crystal oscillator (72), without frequency stabilization circuitry. Variations in the output of the crystal oscillator (72) are compensated by adjusting the multiplication factor of the frequency synthesizer.

Abstract translation: 移动设备包括用于以参考频率的倍数产生频道频率的频率合成器电路（44）。 参考频率由自由运行的晶体振荡器（72）产生，没有频率稳定电路。 通过调整频率合成器的乘法因子来补偿晶体振荡器（72）的输出的变化。

公开(公告)号：WO2005104380A2

公开(公告)日：2005-11-03

申请号：PCT/US2005/013000

申请日：2005-04-18

Applicant: TEXAS INSTRUMENTS INCORPORATED ,  MUHAMMAD, Khurram ,  STASZEWSKI, Robert, B. ,  LEIPOLD, Dirk

Inventor： MUHAMMAD, Khurram ,  STASZEWSKI, Robert, B. ,  LEIPOLD, Dirk

IPC: H04B1/16

CPC classification number: H03D7/18 ,  H03H19/004 ,  H03H2007/0192

Abstract: Disclosed are methods, circuits and systems for image reject filtering in a multi-tap direct sampling mixer (MTDSM) of an IF or RF system. Disclosed is the use of rotating capacitors among the in-phase and quadrature branches of a signal processing system. The exchange of information among the branches of the I and Q channels is used in the implementation of a complex filter. Rotation of a switched capacitor C R between the I and Q channels of the circuit causes a sharing of the charge among the four paths, I+, I-, Q+, Q-, resulting in a direct sampling and a complex filtering arrangement (10). The preferred embodiment of the filter (10) shown can be seen to have four sub-circuits (12, 14, 16, 18), which may be understood as single-pole IIR filters. Embodiments using cascaded multiple stages of the complex filter to provide higher order complex filters are also disclosed.

Abstract translation: 公开了用于IF或RF系统的多抽头直接采样混频器（MTDSM）中的图像抑制滤波的方法，电路和系统。 公开了在信号处理系统的同相和正交分支中使用旋转电容器。 在I和Q通道的分支之间的信息交换被用于实现复杂的过滤器。 在电路的I和Q通道之间的开关电容器CR的旋转导致在四个路径I +，I，Q +，Q-中的电荷共享，导致直接采样和复杂滤波装置（10）。 可以看出所示滤波器（10）的优选实施例具有四个子电路（12,14,16,18），其可被理解为单极IIR滤波器。 还公开了使用复合滤波器的级联多级以提供更高阶复数滤波器的实施例。