公开(公告)号：US20080112712A1

公开(公告)日：2008-05-15

申请号：US11929805

申请日：2007-10-30

申请人： Takahiro Inoue

发明人： Takahiro Inoue

IPC分类号： H04B10/06 ,  H03H11/12

CPC分类号： H03H11/0455 ,  H03F3/087 ,  H03F3/45183 ,  H03F3/45475 ,  H03F3/45636 ,  H03F3/45932 ,  H03F2203/45101 ,  H03F2203/45138 ,  H03H11/0433 ,  H03H11/0472 ,  H03K3/0231 ,  H03K3/0322 ,  H03K2005/00071 ,  H03K2005/00208

摘要： A bandpass filter circuit 10 of the present invention includes: transconductance amplifier circuits 1 to 3; a common-mode feedback circuit 4 which outputs a first control signal to the transconductance amplifier circuit 1 so that a D.C. voltage level of a differential output of the transconductance amplifier circuit 1 is at a predetermined level; a common-mode feedback circuit 5 which outputs a second control signal to the transconductance amplifier circuit 2 so that a D.C. voltage level of a differential output of the transconductance amplifier circuit 2 is at a predetermined level; and capacitors C1 to C3. Each of the members are connected as shown in FIG. 1. With the configuration, a bandpass filter circuit capable of adjusting constants such as a Q-value is realized.

摘要翻译： 本发明的带通滤波器电路10包括：跨导放大器电路1至3; 共模反馈电路4，其向跨导放大器电路1输出第一控制信号，使得跨导放大器电路1的差分输出的直流电压电平处于预定电平; 输出第二控制信号到跨导放大器电路2的共模反馈电路5，使得跨导放大器电路2的差分输出的直流电压电平处于预定电平; 和电容器C 1至C 3。每个构件如图1所示连接。 通过该结构，实现了能够调整诸如Q值的常数的带通滤波器电路。

公开(公告)号：US09698757B2

公开(公告)日：2017-07-04

申请号：US14908067

申请日：2014-07-24

申请人： Samsung Electronics Co., Ltd.

发明人： Byungki Han ,  Suseob Ahn ,  Jongwoo Lee

IPC分类号： H03H11/12 ,  H03H11/04 ,  H04L25/03 ,  H03H7/24

CPC分类号： H03H11/12 ,  H03H7/24 ,  H03H11/0405 ,  H03H11/0455 ,  H03H11/1252 ,  H03H11/1291 ,  H03H2011/0494 ,  H03H2250/00 ,  H04L25/03

摘要： The ABB blocks 332, 334, 336, and 318 are configured to process the I/Q signals corresponding to the first or the second HB independently or the I/Q signals corresponding to the LB in cooperation by two. In detail, the first ABB I block 332 and the first ABB Q block 334 operate independently in the 3G/4G mode but they are configured to process the I signal (or Q signal) of the LB in the 2G mode. Likewise, the second ABB Q block 336 and the second ABB I block 318 operate independently in the 3G/4G mode but they are configured to process the Q signal (or I signal) of the LB in the 2G mode. The first ABB I/Q blocks 332 and 334 and the second ABB I/Q blocks 336 and 318 are arranged symmetrically to processing the I/Q signals cooperatively in the 2G mode. In detail, the second ABB Q block 336 is arranged close to the first ABB Q block 334 such that the capacitor regions included in the first ABB I/Q blocks 332 and 334 are connected to each other and the capacitor regions included in the second ABB I/Q blocks 336 and 338 are connected to each other.

公开(公告)号：US08872580B2

公开(公告)日：2014-10-28

申请号：US13550255

申请日：2012-07-16

申请人： Hussain Alzaher

发明人： Hussain Alzaher

IPC分类号： H03K17/16

CPC分类号： H03H11/0455 ,  H03H11/0422 ,  H03H11/36

摘要： Voltage and current mode reconfigurable nth-order filters (RNOFs) fabricated in a 0.18 μm CMOS process are disclosed. The RNOFs utilize an inverse-follow-the-leader-feedback (IFLF) signal path with summed outputs, resulting in a follow-the-leader-feedback-summed-outputs (FLF-SO) filter topology. The FLF-SO filter uses multi-output current amplifiers (CAs). Inverse-follow-the-leader-feedback-summed-outputs (IFLF-SO) and inverse-follow-the-leader-feedback-distributed-outputs (IFLF-DI) structures are realized by employing 3n+4 transconductance amplifiers (TCAs) for voltage mode processing and two TCAs for current mode signals. A plurality of programmable current division networks (CDNs) tune a digitally controlled current follower (DCCF). A multi-output Digitally Controlled Current Amplifier (MDCCA) controls gain by providing independent filter coefficient control. Forward path output gains are set to unity. Alternatively, a multi-output digitally controlled CCII block (MDCCCII) uses CCII in the first stage. Such filters provide independent tuning of both numerator as well as denominator coefficients and are reconfigurable without the need of switches due to CDNs setting undesired output current to zero.

摘要翻译： 公开了以0.18μmCMOS工艺制造的电压和电流模式可重新配置的n阶滤波器（RNOF）。 RNOF利用具有相加输出的反向跟随前导反馈（IFLF）信号路径，导致跟随前导 - 反馈求和输出（FLF-SO）滤波器拓扑。 FLF-SO滤波器使用多输出电流放大器（CA）。 通过采用3n + 4跨导放大器（TCA）实现反向跟随 - 前导反馈求和输出（IFLF-SO）和反向跟随 - 前导反馈分布式输出（IFLF-DI） 用于电压模式处理和两个TCA用于电流模式信号。 多个可编程分频网络（CDN）调谐数字控制的电流跟随器（DCCF）。 多输出数字控制电流放大器（MDCCA）通过提供独立的滤波器系数控制来控制增益。 前向路径输出增益设置为1。 或者，多输出数字控制CCII块（MDCCCII）在第一级使用CCII。 这样的滤波器提供分子和分母系数的独立调谐，并且由于CDN将不需要的输出电流设置为零而可重新配置而不需要开关。

公开(公告)号：US20110316628A1

公开(公告)日：2011-12-29

申请号：US13168777

申请日：2011-06-24

申请人： Chun-Ming CHANG ,  Shu-Hui Tu

发明人： Chun-Ming CHANG ,  Shu-Hui Tu

IPC分类号： H03F3/45

CPC分类号： H03F3/45475 ,  H03F3/211 ,  H03F2200/405 ,  H03F2203/21142 ,  H03F2203/21145 ,  H03F2203/21175 ,  H03F2203/45544 ,  H03F2203/45548 ,  H03F2203/45631 ,  H03H11/0433 ,  H03H11/0455 ,  H03H11/0472 ,  H03H11/1291 ,  H03H11/32 ,  H03H11/34

摘要： A complimentary single-ended-input OTA-C universal filter structures in terms of integrated circuits is provided. The integrated circuit comprises a plurality of amplifiers and a plurality of capacitors. In some capacitors, one electrode is electrically connected to the positive input of its corresponding amplifier, and the other electrode can be electrically connected to an electrical source. In addition, the negative input of one amplifier is electrically connected to the negative input of another amplifier. Besides, there are a head amplifier and a tail amplifier. The output of the head amplifier is electrically connected to the negative input of the head amplifier, and the positive input of the tail amplifier can be electrically connected to an electrical source.

摘要翻译： 提供了集成电路方面的免费单端输入OTA-C通用滤波器结构。 集成电路包括多个放大器和多个电容器。 在一些电容器中，一个电极电连接到其对应的放大器的正输入端，另一个电极可以电连接到电源。 此外，一个放大器的负输入电连接到另一放大器的负输入。 此外，还有头放大器和尾放大器。 头放大器的输出电连接到头放大器的负输入，并且尾放大器的正输入端可以电连接到电源。

公开(公告)号：US5764100A

公开(公告)日：1998-06-09

申请号：US800008

申请日：1997-02-13

申请人： Mark J. Callicotte ,  John K. Grosspietsch

发明人： Mark J. Callicotte ,  John K. Grosspietsch

IPC分类号： H03H15/00 ,  H03H11/04 ,  H03H11/12 ,  H03K5/00 ,  H03F1/00

CPC分类号： H03H11/0455

摘要： A transconductance filter (200) comprises multiple stages of a transconductor (110,120,130) having an input and an output, and a switch (260,265,270) coupled between the output and the voltage source. The switch is operatively responsive to the control signal for coupling and decoupling the voltage source directly to the output of the transconductor at least prior to the time the filter is required to filter the input voltage signal. The voltage source is within a predetermined input voltage range of the transconductor defined by a region in which a transconductance of the transconductor is substantially constant and positive.

摘要翻译： 跨导滤波器（200）包括具有输入和输出的多级跨导体（110,120,130）和耦合在输出端和电压源之间的开关（260,265,270）。 至少在需要滤波器以过滤输入电压信号之前，该开关可操作地响应于控制信号，用于将电压源直接耦合到去耦到跨导体的输出。 电压源在由跨导体的跨导基本上恒定且为正的区域限定的跨导体的预定输入电压范围内。

公开(公告)号：US20160173063A1

公开(公告)日：2016-06-16

申请号：US14908067

申请日：2014-07-24

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Byungki HAN ,  Suseob AHN ,  Jongwoo LEE

IPC分类号： H03H11/12 ,  H03H11/04

CPC分类号： H03H11/12 ,  H03H7/24 ,  H03H11/0405 ,  H03H11/0455 ,  H03H11/1252 ,  H03H11/1291 ,  H03H2011/0494 ,  H03H2250/00 ,  H04L25/03

摘要： A filtering apparatus and method of a multimode multiband transceiver is provided for filtering a signal carrying an analog baseband signal. A filtering apparatus of a multimode multiband radio transceiver of the present invention includes a filtering unit which filters Radio Frequency (RF) signals on one of at least one frequency bands, a switching unit which switches the signals among at least one filter block included in the filtering unit according to a selected communication mode, and a controller which selects the communication mode and controls the switching unit. The analog signal filtering apparatus and method of the present invention is advantageous in terms of providing a variable gain amplifier, filter circuit, and algorithm capable of fulfilling the gains and bandwidths required by the baseband receiver for all mobile communication standards complied by 2G, 3G, and 4G systems.

摘要翻译： 提供了一种多模多频收发器的滤波装置和方法，用于对携带模拟基带信号的信号进行滤波。 本发明的多模多频带无线电收发器的滤波装置包括：滤波单元，其对至少一个频带中的一个频带上的射频（RF）信号进行滤波;切换单元，其在包括在所述至少一个频带中的至少一个滤波器块 过滤单元，以及选择通信模式并控制切换单元的控制器。 本发明的模拟信号滤波装置和方法在提供一种可变增益放大器，滤波器电路和算法方面是有利的，该可变增益放大器，滤波器电路和算法能够满足基带接收机对2G，3G所遵循的所有移动通信标准所需的增益和带宽， 和4G系统。

公开(公告)号：US20140015602A1

公开(公告)日：2014-01-16

申请号：US13550255

申请日：2012-07-16

申请人： HUSSAIN ALZAHER

发明人： HUSSAIN ALZAHER

IPC分类号： H03B1/00

CPC分类号： H03H11/0455 ,  H03H11/0422 ,  H03H11/36

摘要： Voltage and current mode reconfigurable nth-order filters (RNOFs) fabricated in a 0.18 μm CMOS process are disclosed. The RNOFs utilize an inverse-follow-the-leader-feedback (IFLF) signal path with summed outputs, resulting in a follow-the-leader-feedback-summed-outputs (FLF-SO) filter topology. The FLF-SO filter uses multi-output current amplifiers (CAs). Inverse-follow-the-leader-feedback-summed-outputs (IFLF-SO) and inverse-follow-the-leader-feedback-distributed-outputs (IFLF-DI) structures are realized by employing 3n+4 transconductance amplifiers (TCAs) for voltage mode processing and two TCAs for current mode signals. A plurality of programmable current division networks (CDNs) tune a digitally controlled current follower (DCCF). A multi-output Digitally Controlled Current Amplifier (MDCCA) controls gain by providing independent filter coefficient control. Forward path output gains are set to unity. Alternatively, a multi-output digitally controlled CCII block (MDCCCII) uses CCII in the first stage. Such filters provide independent tuning of both numerator as well as denominator coefficients and are reconfigurable without the need of switches due to CDNs setting undesired output current to zero.

摘要翻译： 公开了在0.18μmCMOS工艺中制造的电压和电流模式可重构n阶滤波器（RNOF）。 RNOF利用具有相加输出的反向跟随前导反馈（IFLF）信号路径，导致跟随前导 - 反馈求和输出（FLF-SO）滤波器拓扑。 FLF-SO滤波器使用多输出电流放大器（CA）。 通过采用3n + 4跨导放大器（TCA）实现反向跟随 - 前导反馈求和输出（IFLF-SO）和反向跟随 - 前导反馈分布式输出（IFLF-DI） 用于电压模式处理和两个TCA用于电流模式信号。 多个可编程分频网络（CDN）调谐数字控制的电流跟随器（DCCF）。 多输出数字控制电流放大器（MDCCA）通过提供独立的滤波器系数控制来控制增益。 前向路径输出增益设置为1。 或者，多输出数字控制CCII块（MDCCCII）在第一级使用CCII。 这样的滤波器提供分子和分母系数的独立调谐，并且由于CDN将不需要的输出电流设置为零而可重新配置而不需要开关。

公开(公告)号：US08461917B2

公开(公告)日：2013-06-11

申请号：US13168777

申请日：2011-06-24

申请人： Chun-Ming Chang ,  Shu-Hui Tu

发明人： Chun-Ming Chang ,  Shu-Hui Tu

IPC分类号： H03K5/00

CPC分类号： H03F3/45475 ,  H03F3/211 ,  H03F2200/405 ,  H03F2203/21142 ,  H03F2203/21145 ,  H03F2203/21175 ,  H03F2203/45544 ,  H03F2203/45548 ,  H03F2203/45631 ,  H03H11/0433 ,  H03H11/0455 ,  H03H11/0472 ,  H03H11/1291 ,  H03H11/32 ,  H03H11/34

摘要： A complimentary single-ended-input OTA-C universal filter structures in terms of integrated circuits is provided. The integrated circuit comprises a plurality of amplifiers and a plurality of capacitors. In some capacitors, one electrode is electrically connected to the positive input of its corresponding amplifier, and the other electrode can be electrically connected to an electrical source. In addition, the negative input of one amplifier is electrically connected to the negative input of another amplifier. Besides, there are a head amplifier and a tail amplifier. The output of the head amplifier is electrically connected to the negative input of the head amplifier, and the positive input of the tail amplifier can be electrically connected to an electrical source.

摘要翻译： 提供了集成电路方面的免费单端输入OTA-C通用滤波器结构。 集成电路包括多个放大器和多个电容器。 在一些电容器中，一个电极电连接到其对应的放大器的正输入端，另一个电极可以电连接到电源。 此外，一个放大器的负输入电连接到另一放大器的负输入。 此外，还有头放大器和尾放大器。 头放大器的输出电连接到头放大器的负输入，并且尾放大器的正输入端可以电连接到电源。

公开(公告)号：US07865087B2

公开(公告)日：2011-01-04

申请号：US11929805

申请日：2007-10-30

申请人： Takahiro Inoue

发明人： Takahiro Inoue

IPC分类号： H04B10/06 ,  H03B1/00

CPC分类号： H03H11/0455 ,  H03F3/087 ,  H03F3/45183 ,  H03F3/45475 ,  H03F3/45636 ,  H03F3/45932 ,  H03F2203/45101 ,  H03F2203/45138 ,  H03H11/0433 ,  H03H11/0472 ,  H03K3/0231 ,  H03K3/0322 ,  H03K2005/00071 ,  H03K2005/00208

摘要： A bandpass filter circuit 10 of the present invention includes: transconductance amplifier circuits 1 to 3; a common-mode feedback circuit 4 which outputs a first control signal to the transconductance amplifier circuit 1 so that a D.C. voltage level of a differential output of the transconductance amplifier circuit 1 is at a predetermined level; a common-mode feedback circuit 5 which outputs a second control signal to the transconductance amplifier circuit 2 so that a D.C. voltage level of a differential output of the transconductance amplifier circuit 2 is at a predetermined level; and capacitors C1 to C3. Each of the members are connected as shown in FIG. 1. With the configuration, a bandpass filter circuit capable of adjusting constants such as a Q-value is realized.

摘要翻译： 本发明的带通滤波器电路10包括：跨导放大器电路1至3; 共模反馈电路4，其向跨导放大器电路1输出第一控制信号，使得跨导放大器电路1的差分输出的直流电压电平处于预定电平; 输出第二控制信号到跨导放大器电路2的共模反馈电路5，使得跨导放大器电路2的差分输出的直流电压电平处于预定电平; 和电容器C1〜C3。 每个构件如图1所示连接。 通过该结构，实现了能够调整诸如Q值的常数的带通滤波器电路。

公开(公告)号：US07173485B2

公开(公告)日：2007-02-06

申请号：US11058194

申请日：2005-02-16

申请人： Toshiaki Nagai

发明人： Toshiaki Nagai

IPC分类号： H03F1/36

CPC分类号： H03F3/45197 ,  H03F2203/45072 ,  H03F2203/45482 ,  H03H11/0455 ,  H03H11/0472 ,  H03M3/37 ,  H03M3/424 ,  H03M3/452

摘要： A filter circuit includes a plurality of integrator stages, each stage including a voltage-to-current converter to convert an input voltage into a current supplied to an output thereof and a capacitor coupled to the output of the voltage-to-current converter, a voltage charged in the capacitor being supplied to a next stage as an output of each stage, and a capacitor serving as a feed-forward coupling that couples the output of at least one stage of the plurality of integrator stages to a last output node.

摘要翻译： 滤波器电路包括多个积分器级，每个级包括电压 - 电流转换器，用于将输入电压转换成提供给其输出的电流和耦合到电压 - 电流转换器的输出的电容器; 被提供给下一级的电容器中的电压作为每个级的输出，以及用作将多个积分器级的至少一级的输出耦合到最后输出节点的前馈耦合的电容器。