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1. 发明申请

US20120086504A1 NONLINEAR DISTORTION COMPENSATING RECEIVER AND NONLINEAR DISTORTION COMPENSATION METHOD 有权
标题翻译：非线性失真补偿接收器和非线性失真补偿方法
公开(公告)号：US20120086504A1
公开(公告)日：2012-04-12
申请号：US13378477
申请日：2010-07-05
申请人： Satoshi Tsukamoto , Noriaki Saito , Yoshito Shimizu , Tadashi Morita , Katsuaki Abe
发明人： Satoshi Tsukamoto , Noriaki Saito , Yoshito Shimizu , Tadashi Morita , Katsuaki Abe
IPC分类号： H04B1/10
CPC分类号： H04B1/109 , H04B1/0028 , H04B1/123 , H04L27/3863
摘要： Disclosed are a nonlinear distortion compensating receiver and nonlinear distortion compensation method, wherein nonlinear distortion is reduced with a simple circuit configuration. A correction (opposite characteristics) filter (104) has characteristics opposite that of the frequency characteristics of a direct sampling mixer (102) and corrects signals sampled by the direct sampling mixer (102). In the main path, a LPF (106) extracts a frequency band component of a desired signal from the corrected signal. In the replica path, a BPF (107) extracts the frequency band component of a blocker signal from the corrected signal. A cubing circuit (108) uses the frequency band component of the blocker signal to generate a replica signal for the nonlinear distortion. An adaptive filter (110) performs filter processing on the replica signal while updating the filter coefficients. A subtractor (111) subtracts the output signal of the adaptive filter (110) from the frequency band component of the extracted desired signal and outputs the subtraction result as the desired signal.
摘要翻译：公开了一种非线性失真补偿接收机和非线性失真补偿方法，其中通过简单的电路配置来减少非线性失真。校正（相反特性）滤波器（104）具有与直接采样混频器（102）的频率特性相反的特性，并且校正由直接采样混频器（102）采样的信号。在主路径中，LPF（106）从校正信号中提取期望信号的频带分量。在副本路径中，BPF（107）从修正信号中提取阻塞信号的频带分量。立方体电路（108）使用阻塞信号的频带分量来产生用于非线性失真的复制信号。自适应滤波器（110）在更新滤波器系数的同时对复制信号执行滤波处理。减法器（111）从所提取的期望信号的频带分量中减去自适应滤波器（110）的输出信号，并输出相减结果作为期望信号。

2. 发明申请

US20120002768A1 DISTORTION-CORRECTING RECEIVER AND DISTORTION CORRECTION METHOD 审中-公开
标题翻译：失真校正接收器和失真校正方法
公开(公告)号：US20120002768A1
公开(公告)日：2012-01-05
申请号：US13256885
申请日：2010-03-05
申请人： Tadashi Morita , Yoshito Shimizu , Noriaki Saito
发明人： Tadashi Morita , Yoshito Shimizu , Noriaki Saito
IPC分类号： H03D1/04
CPC分类号： H04B1/30 , H04B1/123
摘要： Disclosed are a distortion-correcting receiver and a distortion correction method capable of precisely cancelling inter-modulation secondary distortion even when an input signal is markedly band-limited in a reception processing unit. In the distortion-correcting receiver (100), the reception processing unit (110) executes reception processing of the input signal and outputs a received signal. A replica signal generation unit (120) generates a replica signal of the inter-modulation distortion component of the input signal by use of the input signal. A correction signal generation unit (130) comprises a frequency property imparting unit (131) and a weighting unit (132), adjusts the frequency property and the gain of the replica signal, and generates a correction signal. A correction signal injection unit (140) adds the reverse-phase signal of the correction signal to the received signal to correct the received signal.
摘要翻译：公开了一种失真校正接收机和失真校正方法，即使在接收处理单元中输入信号被带限制时，也能够精确地消除互调二次失真。在失真校正接收机（100）中，接收处理单元（110）执行输入信号的接收处理并输出接收信号。复制信号生成单元（120）通过使用输入信号生成输入信号的互调失真分量的复制信号。校正信号生成单元（130）包括频率特性赋予单元（131）和加权单元（132），调整复制信号的频率特性和增益，并生成校正信号。校正信号注入单元（140）将校正信号的反相信号加到接收信号上以校正接收到的信号。

3. 发明授权

US08655297B2 Nonlinear distortion compensating receiver and nonlinear distortion compensation method 有权
标题翻译：非线性失真补偿接收机和非线性失真补偿方法
公开(公告)号：US08655297B2
公开(公告)日：2014-02-18
申请号：US13378477
申请日：2010-07-05
申请人： Satoshi Tsukamoto , Noriaki Saito , Yoshito Shimizu , Tadashi Morita , Katsuaki Abe
发明人： Satoshi Tsukamoto , Noriaki Saito , Yoshito Shimizu , Tadashi Morita , Katsuaki Abe
IPC分类号： H04B1/10
CPC分类号： H04B1/109 , H04B1/0028 , H04B1/123 , H04L27/3863
摘要： Disclosed are a nonlinear distortion compensating receiver and nonlinear distortion compensation method, wherein nonlinear distortion is reduced with a simple circuit configuration. A correction (opposite characteristics) filter (104) has characteristics opposite that of the frequency characteristics of a direct sampling mixer (102) and corrects signals sampled by the direct sampling mixer (102). In the main path, a LPF (106) extracts a frequency band component of a desired signal from the corrected signal. In the replica path, a BPF (107) extracts the frequency band component of a blocker signal from the corrected signal. A cubing circuit (108) uses the frequency band component of the blocker signal to generate a replica signal for the nonlinear distortion. An adaptive filter (110) performs filter processing on the replica signal while updating the filter coefficients. A subtractor (111) subtracts the output signal of the adaptive filter (110) from the frequency band component of the extracted desired signal and outputs the subtraction result as the desired signal.
摘要翻译：公开了一种非线性失真补偿接收机和非线性失真补偿方法，其中通过简单的电路配置来减少非线性失真。校正（相反特性）滤波器（104）具有与直接采样混频器（102）的频率特性相反的特性，并且校正由直接采样混频器（102）采样的信号。在主路径中，LPF（106）从校正信号中提取期望信号的频带分量。在副本路径中，BPF（107）从修正信号中提取阻塞信号的频带分量。立方体电路（108）使用阻塞信号的频带分量来产生用于非线性失真的复制信号。自适应滤波器（110）在更新滤波器系数的同时对复制信号执行滤波处理。减法器（111）从所提取的期望信号的频带分量中减去自适应滤波器（110）的输出信号，并输出相减结果作为期望信号。

4. 发明授权

US08081943B2 Reception apparatus and reception method 有权
标题翻译：接收方式和接收方式
公开(公告)号：US08081943B2
公开(公告)日：2011-12-20
申请号：US12276047
申请日：2008-11-21
申请人： Yoshito Shimizu , Takeaki Watanabe , Noriaki Saito
发明人： Yoshito Shimizu , Takeaki Watanabe , Noriaki Saito
IPC分类号： H04B1/06 , H04B7/00
CPC分类号： H04B1/30
摘要： A receiving apparatus includes an amplification section that amplifies a received signal and a frequency conversion section that converts a frequency of the received signal, from a radio frequency to a baseband, the baseband having a lower frequency than the radio frequency. A gain control section amplifies, by a predetermined gain, the signal that has been subjected to the frequency conversion to the baseband. A voltage calibration section performs calibration on an offset voltage generated in the signal subjected to frequency conversion to the baseband. A time constant control section sets a first time constant during a reception operation and sets a second time constant, which is reduced with respect to the first time constant, during the calibration. A filter section passes a received signal of a predetermined band, with the first time constant or the second time constant, an operation control section stops operation of the amplification section during the calibration, controls the amplification section to operate during the reception operation, and controls the operation of the amplification section so as to reduce a residual offset voltage caused by switching the operation of the amplification section.
摘要翻译：接收装置包括放大接收信号的放大部分和频率转换部分，该频率转换部分将接收信号的频率从射频转换成基带，频率低于射频。增益控制部分将经过频率转换的信号以预定的增益放大到基带。电压校准部对经过频率转换为基带的信号中产生的偏移电压进行校准。时间常数控制部分在接收操作期间设置第一时间常数，并且在校准期间设置相对于第一时间常数减小的第二时间常数。滤波器部分以第一时间常数或第二时间常数通过预定频带的接收信号，操作控制部分在校准期间停止放大部分的操作，控制放大部分在接收操作期间操作，并且控制放大部分的操作，以便减少由于放大部分的操作而导致的残留偏移电压。

5. 发明申请

US20110176640A1 SAMPLING CIRCUIT AND RECEIVER UTILIZING THE SAME 有权
标题翻译：采样电路和接收器使用它
公开(公告)号：US20110176640A1
公开(公告)日：2011-07-21
申请号：US13121244
申请日：2009-12-04
申请人： Yohei Morishita , Noriaki Saito , Yoshito Shimizu
发明人： Yohei Morishita , Noriaki Saito , Yoshito Shimizu
IPC分类号： H04L25/06 , G11C27/02
CPC分类号： H03H19/004 , H03H15/00 , H04B1/28
摘要： Disclosed are a sampling circuit and a receiver that have a high level of filter design flexibility and excellent image rejection characteristics. Signals with phases that differ by 90° are sampled using an IQ generating circuit (101) and are weighted by each of multiple parallel-connected discrete-time circuits (102-1-102-n), and the result of addition by an output adding circuit (103) is ultimately output. Alternatively, a configuration in which the multiple parallel-connected discrete-time circuits (102-1-102-n) and the output adding circuit (103) are cascade-connected is adopted, so that frequency characteristics having an attenuation pole to one side can be achieved and excellent image rejection characteristics can be obtained.
摘要翻译：公开了具有高水平的滤波器设计灵活性和优异的图像抑制特性的采样电路和接收器。使用IQ生成电路（101）对具有相差90°的相位的信号进行采样，并由多个并联连接的离散时间电路（102-1-102-n）中的每一个进行加权，并且通过输出最终输出加法电路（103）。或者，采用其中并联连接的多个离散时间电路（102-1-102-n）和输出加法电路（103）串联的配置，使得具有到一侧具有衰减极点的频率特性并且可以获得优异的图像抑制特性。

6. 发明授权

US07715808B2 Polar modulating circuit, polar coordinate modulating method, integrated circuit and radio transmission device 有权
标题翻译：极坐标调制电路，极坐标调制方法，集成电路和无线电传输装置
公开(公告)号：US07715808B2
公开(公告)日：2010-05-11
申请号：US11814181
申请日：2006-04-26
申请人： Yoshito Shimizu , Noriaki Saito
发明人： Yoshito Shimizu , Noriaki Saito
IPC分类号： H04B1/02
CPC分类号： H03C5/00 , H03C1/36 , H03C3/40 , H03F1/0222 , H03F1/3282
摘要： This invention intends to provide a polar modulating circuit, a polar modulating method, an integrated circuit and a radio transmission device capable of compensating for a delay difference between paths of a phase signal and an amplitude signal while suppressing an increase in the circuit scale in a polar modulating system. In a delay quantity determining unit 102, delay quantity information relative to the amplitude value of the amplitude signal or transmission level information S1, based on the step response characteristic of a power amplifying unit 105 are previously stored as table data. Thus, by executing delay adjustment using, as a reference signal, the amplitude signal or transmission level information S1, the delay difference between paths of a phase signal and an amplitude signal can be compensated for while suppressing an increase in the circuit scale.
摘要翻译：本发明旨在提供一种极坐标调制电路，极坐标调制方法，集成电路和无线电传输装置，能够补偿相位信号和振幅信号的路径之间的延迟差，同时抑制电路规模的增加极性调制系统。在延迟量确定单元102中，基于功率放大单元105的阶跃响应特性相对于幅度信号或发送电平信息S1的振幅值的延迟量信息被预先存储为表数据。因此，通过使用作为参考信号的振幅信号或发送电平信息S1进行延迟调整，可以在抑制电路规模的增加的同时补偿相位信号的路径与幅度信号之间的延迟差。

7. 发明申请

US20090295436A1 ELECTRONIC CIRCUIT, FREQUENCY DIVIDER AND RADIO SET 失效
标题翻译：电子电路，频率分配器和无线电设备
公开(公告)号：US20090295436A1
公开(公告)日：2009-12-03
申请号：US12065674
申请日：2006-09-01
申请人： Yoshifumi Hosokawa , Noriaki Saito , Yoshito Shimizu
发明人： Yoshifumi Hosokawa , Noriaki Saito , Yoshito Shimizu
IPC分类号： H03K23/00 , H03K3/289
CPC分类号： H03K3/289 , H03K23/44
摘要： A master stage 101 comprises a differential circuit composed of transistors 1 and 2, a differential circuit composed of transistors 3 and 4, a differential circuit composed of transistors 5 and 6, a load circuit 7 (a first load circuit), a load circuit 8 (a second load circuit), and a current source transistor 9. The load circuit 7 (the first load circuit) is composed of an inductor 7A (a first inductor), an inductor 7B (a fifth inductor), and a capacity 7C (a first capacity). The inductor 7B and capacity 7C cooperates together in forming a parallel resonance circuit (a first LC parallel resonance circuit), while the parallel resonance circuit is connected in series to the inductor 7A.
摘要翻译：主级101包括由晶体管1和2组成的差分电路，由晶体管3和4组成的差分电路，由晶体管5和6组成的差分电路，负载电路7（第一负载电路），负载电路8 （第二负载电路）和电流源晶体管9.负载电路7（第一负载电路）由电感器7A（第一电感器），电感器7B（第五电感器）和容量7C（第一容量）。电感器7B和电容7C在形成并联谐振电路（第一LC并联谐振电路）时协同工作，而并联谐振电路与电感器7A串联连接。

8. 发明申请

US20070229180A1 Distortion Compensation Circuit 有权
标题翻译：失真补偿电路
公开(公告)号：US20070229180A1
公开(公告)日：2007-10-04
申请号：US11569970
申请日：2005-06-27
申请人： Yoshito Shimizu , Noriaki Saito
发明人： Yoshito Shimizu , Noriaki Saito
IPC分类号： H03F1/30 , H04L27/20
CPC分类号： H04L27/367 , H03F1/3282
摘要： A distortion compensating circuit is provided in which, in the polar modulation system, while suppressing increase of compensation data and increase of the circuit scale, a modulated signal can be correctly expressed, or low-distortion characteristics of a power amplifier can be realized. Based on a steady characteristic compensating circuit 11 which stores an output signal amplitude and output phase characteristics with respect to a control voltage in a steady state, amplitude adjustment is executed on amplitude information r11(t) on which amplitude correction is performed, by a first amplitude information adjusting portion 13, whereby the output-response characteristics of an output signal amplitude of an amplifier with respect to a change of the control voltage can be improved.
摘要翻译：提供了一种失真补偿电路，其中在极坐标调制系统中，在抑制补偿数据的增加和电路规模的增加的同时，可以正确地表达调制信号，或者能够实现功率放大器的低失真特性。基于稳定特性补偿电路11，其以相对于稳定状态的控制电压存储输出信号幅度和输出相位特性，对其进行幅度校正的振幅信息r 11（t）执行幅度调整，第一幅度信息调整部分13，从而可以提高放大器的输出信号幅度相对于控制电压变化的输出响应特性。

9. 发明申请

US20120049926A1 HARMONIC REJECTION MIXER 有权
标题翻译：谐波抑制混合器
公开(公告)号：US20120049926A1
公开(公告)日：2012-03-01
申请号：US13143789
申请日：2010-01-29
申请人： Yoshito Shimizu , Noriaki Saito , Kiyomichi Araki , Takafumi Nasu
发明人： Yoshito Shimizu , Noriaki Saito , Kiyomichi Araki , Takafumi Nasu
IPC分类号： G06G7/12
CPC分类号： H03D7/165 , H03D2200/0086
摘要： Disclosed is a harmonic rejection mixer that makes it possible to suppress high-frequency response, while keeping the number of gm elements from increasing. In a harmonic rejection mixer that regulates the waveform of an output signal by mixing outputs of multiple mixers that are connected in parallel with the latter stage of multiple gm elements, some of the gm elements are shared by I phase and Q phase by using a control signal with a duty ratio of less than 50% to drive at least some of the mixers, and then using the period in which the I-phase mixers are inactive to activate the Q-phase mixers.
摘要翻译：公开了一种谐波抑制混频器，其能够抑制高频响应，同时保持gm元件的数量不增加。在通过混合与多个gm元件的后级并联连接的多个混频器的输出来调节输出信号的波形的谐波抑制混频器中，一些gm元件由I相和Q相共享，通过使用控制信号，占空比小于50％，以驱动至少一些混频器，然后使用I相混频器无效的周期来激活Q相混频器。

10. 发明授权

US07915969B2 Distortion compensating circuit 有权
标题翻译：失真补偿电路
公开(公告)号：US07915969B2
公开(公告)日：2011-03-29
申请号：US12342551
申请日：2008-12-23
申请人： Yoshito Shimizu , Noriaki Saito
发明人： Yoshito Shimizu , Noriaki Saito
IPC分类号： H03C3/00 , H03F1/32 , H03F3/24 , H04B1/04 , H04L27/20
CPC分类号： H04L27/367 , H03F1/3282
摘要： A distortion compensating circuit is provided in which, in the polar modulation system, while suppressing increase of compensation data and increase of the circuit scale, a modulated signal can be correctly expressed, or low-distortion characteristics of a power amplifier can be realized. Based on a steady characteristic compensating circuit 11 which stores an output signal amplitude and output phase characteristics with respect to a control voltage in a steady state, amplitude adjustment is executed on amplitude information r11(t) on which amplitude correction is performed, by a first amplitude information adjusting portion 13, whereby the output-response characteristics of an output signal amplitude of an amplifier with respect to a change of the control voltage can be improved.
摘要翻译：提供了一种失真补偿电路，其中在极坐标调制系统中，在抑制补偿数据的增加和电路规模的增加的同时，可以正确地表达调制信号，或者能够实现功率放大器的低失真特性。基于稳定特性补偿电路11，其以相对于稳定状态的控制电压存储输出信号振幅和输出相位特性，对其进行幅度校正的振幅信息r11（t）执行幅度调整，第一幅度信息调整部分13，从而可以提高放大器的输出信号幅度相对于控制电压变化的输出响应特性。

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