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1. 发明授权

US07427895B1 Doherty amplifier with improved linearity 有权
标题翻译： Doherty放大器具有提高的线性度
公开(公告)号：US07427895B1
公开(公告)日：2008-09-23
申请号：US11581418
申请日：2006-10-17
申请人： Yoichi Okubo , Yasuhiro Takeda , Manabu Nakamura , Naoki Hongo , Masaru Adachi
发明人： Yoichi Okubo , Yasuhiro Takeda , Manabu Nakamura , Naoki Hongo , Masaru Adachi
IPC分类号： H03F3/68
CPC分类号： H03F1/0288 , H03F3/602
摘要： A first control unit controls a bias applied to the peak amplifier to (a) make a peak amplifier operate as class C when the level of the input signal is lower than a first threshold value, to (b) make the peak amplifier operate as class AB with a second conduction angle substantially equal to a first conduction angle, when the level of the input signal is higher than a second threshold value higher than the first threshold value, and to (c) make the peak amplifier operate as class AB with a third conduction angle smaller than the first conduction angle, when the level of the input signal is not less than the first threshold value and not more than the second threshold value.
摘要翻译：第一控制单元控制施加到峰值放大器的偏置，以便（a）当输入信号的电平低于第一阈值时使峰值放大器工作为C类，以使（b）使峰值放大器工作为类 AB，当输入信号的电平高于高于第一阈值的第二阈值时，具有基本上等于第一导通角的第二导通角，以及（c）使峰值放大器作为AB类工作，其中a 当输入信号的电平不小于第一阈值且不大于第二阈值时，第三导通角小于第一导通角。

2. 发明申请

US20080187035A1 Non-linear distortion detection method and distortion compensation amplifying device 有权
标题翻译：非线性失真检测方法和失真补偿放大装置
公开(公告)号：US20080187035A1
公开(公告)日：2008-08-07
申请号：US12078507
申请日：2008-04-01
申请人： Manabu Nakamura , Yasuhiro Takeda , Yoichi Okubo , Masaru Adachi , Naoki Hongo
发明人： Manabu Nakamura , Yasuhiro Takeda , Yoichi Okubo , Masaru Adachi , Naoki Hongo
IPC分类号： H04L27/01 , H03F1/32
CPC分类号： H03F1/32 , H03F1/0288 , H03F1/3247 , H03F3/245 , H03F2200/207
摘要： A conventional power amplifying device has a problem that when a signal band is widened, sampling frequency for distortion detection is increased and an FFT calculation amount of a distortion compensation unit is increased, which increase a circuit size and power consumption. The present invention provides a non-linear distortion detection method and a distortion compensation amplifying device capable of suppressing increase of the circuit size and the power consumption even if the signal band is widened. A signal obtained by feeding back an output of a power amplifier is sampled by an A/D converter. An equalizer of a distortion detection unit uses an input signal d(n) of a predistorter as a reference symbol to detect an equalization error e(n) of the orthogonal demodulation signal u(n). An absolute value averaging unit outputs an absolute value of the equalization error e(n) which has been temporally averaged to E(n) as a distortion value to a control unit. According to the distortion value, the control unit adaptively controls the predistorter to perform distortion compensation.
摘要翻译：传统的功率放大装置存在如下问题：当信号频带变宽时，失真检测的采样频率增加，并且失真补偿单元的FFT计算量增加，这增加了电路尺寸和功耗。本发明提供即使信号频带变宽也能够抑制电路尺寸和功耗的增加的非线性失真检测方法和失真补偿放大装置。通过反馈功率放大器的输出而获得的信号由A / D转换器采样。失真检测单元的均衡器使用预失真器的输入信号d（n）作为参考符号来检测正交解调信号u（n）的均衡误差e（n）。绝对值平均单元将对时间平均的均衡误差e（n）的绝对值作为失真值输出到控制单元。根据失真值，控制单元自适应地控制预失真器进行失真补偿。

3. 发明授权

US08014443B2 Non-linear distortion detection method and distortion compensation amplifying device 有权
标题翻译：非线性失真检测方法和失真补偿放大装置
公开(公告)号：US08014443B2
公开(公告)日：2011-09-06
申请号：US12078507
申请日：2008-04-01
申请人： Manabu Nakamura , Yasuhiro Takeda , Yoichi Okubo , Masaru Adachi , Naoki Hongo
发明人： Manabu Nakamura , Yasuhiro Takeda , Yoichi Okubo , Masaru Adachi , Naoki Hongo
IPC分类号： H03H7/30 , H03F1/26
CPC分类号： H03F1/32 , H03F1/0288 , H03F1/3247 , H03F3/245 , H03F2200/207
摘要： The present invention provides a non-linear distortion detection method and a distortion compensation amplifying device capable of suppressing increase of the circuit size and the power consumption even if the signal band is widened. A signal obtained by feeding back an output of a power amplifier is sampled by an A/D converter. An equalizer of a distortion detection unit uses an input signal d(n) of a predistorter as a reference symbol to detect an equalization error e(n) of the orthogonal demodulation signal u(n). An absolute value averaging unit outputs an absolute value of the equalization error e(n) which has been temporally averaged to E(n) as a distortion value to a control unit. According to the distortion value, the control unit adaptively controls the predistorter to perform distortion compensation.
摘要翻译：本发明提供即使信号频带变宽也能够抑制电路尺寸和功耗的增加的非线性失真检测方法和失真补偿放大装置。通过反馈功率放大器的输出而获得的信号由A / D转换器采样。失真检测单元的均衡器使用预失真器的输入信号d（n）作为参考符号来检测正交解调信号u（n）的均衡误差e（n）。绝对值平均单元将对时间平均的均衡误差e（n）的绝对值作为失真值输出到控制单元。根据失真值，控制单元自适应地控制预失真器进行失真补偿。

4. 发明申请

US20100171553A1 POWER CIRCUIT 有权
标题翻译：电源电路
公开(公告)号：US20100171553A1
公开(公告)日：2010-07-08
申请号：US12644833
申请日：2009-12-22
申请人： Yoichi Okubo , Manabu Nakamura , Junya Dosaka , Yasuhiro Takeda , Taizo Ito , Naoki Hongo , Taizo Yamawaki , Takashi Kawamoto , Akira Maeki
发明人： Yoichi Okubo , Manabu Nakamura , Junya Dosaka , Yasuhiro Takeda , Taizo Ito , Naoki Hongo , Taizo Yamawaki , Takashi Kawamoto , Akira Maeki
IPC分类号： H03G1/00
CPC分类号： H03F1/0227 , H03F3/19 , H03F2200/451 , H03F2200/462
摘要： A power circuit used for an amplifier, which includes an amplifier provided with a linear amplifier serving as a voltage source, a DC/DC converter serving as a current source, a hysteresis comparator controlling the DC/DC converter, and a current detector detecting output current from the linear amplifier to output the detected output current to the hysteresis comparator; and a switching restricting means for restricting a switching interval in the DC/DC converter such that the switching interval is not equal to or less than a constant time or is not shorter than the constant time.
摘要翻译：用于放大器的电源电路，其包括放大器，该放大器设置有用作电压源的线性放大器，用作电流源的DC / DC转换器，控制DC / DC转换器的滞环比较器以及电流检测器检测输出电流从线性放大器输出检测输出电流到滞后比较器; 以及切换限制装置，用于限制DC / DC转换器中的切换间隔，使得切换间隔不等于或小于恒定时间或不短于恒定时间。

5. 发明授权

US08030995B2 Power circuit used for an amplifier 有权
标题翻译：用于放大器的电源电路
公开(公告)号：US08030995B2
公开(公告)日：2011-10-04
申请号：US12644833
申请日：2009-12-22
申请人： Yoichi Okubo , Manabu Nakamura , Junya Dosaka , Yasuhiro Takeda , Taizo Ito , Naoki Hongo , Taizo Yamawaki , Takashi Kawamoto , Akira Maeki
发明人： Yoichi Okubo , Manabu Nakamura , Junya Dosaka , Yasuhiro Takeda , Taizo Ito , Naoki Hongo , Taizo Yamawaki , Takashi Kawamoto , Akira Maeki
IPC分类号： H03G3/00
CPC分类号： H03F1/0227 , H03F3/19 , H03F2200/451 , H03F2200/462
摘要： A power circuit used for an amplifier, which includes an amplifier provided with a linear amplifier serving as a voltage source, a DC/DC converter serving as a current source, a hysteresis comparator controlling the DC/DC converter, and a current detector detecting output current from the linear amplifier to output the detected output current to the hysteresis comparator; and a switching restricting device for restricting a switching interval in the DC/DC converter such that the switching interval is not equal to or less than a constant time or is not shorter than the constant time.
摘要翻译：用于放大器的电源电路，其包括放大器，该放大器设置有用作电压源的线性放大器，用作电流源的DC / DC转换器，控制DC / DC转换器的滞环比较器以及电流检测器检测输出电流从线性放大器输出检测输出电流到滞后比较器; 以及用于限制DC / DC转换器中的切换间隔使得切换间隔不等于或小于恒定时间或不短于恒定时间的切换限制装置。

6. 发明授权

US07719353B2 LINC amplifying device 有权
标题翻译： LINC放大器
公开(公告)号：US07719353B2
公开(公告)日：2010-05-18
申请号：US12379137
申请日：2009-02-13
申请人： Manabu Nakamura , Taizo Ito , Yoichi Okubo , Naoki Hongo
发明人： Manabu Nakamura , Taizo Ito , Yoichi Okubo , Naoki Hongo
IPC分类号： H03F3/68
CPC分类号： H03F1/0294 , H03F1/56 , H03F3/602 , H03F2200/222 , H03F2200/387 , H03F2200/423
摘要： An amplifying apparatus includes a splitting unit for splitting an input signal into a first split signal and a second split signal; phase-shifting unit for phase-shifting the first split signal and the second split signal, respectively; a first amplifying unit for amplifying a first phase-shifted signal and outputting the signal as a first output signal; a second amplifying unit for amplifying, in a substantially identical manner to the first amplifying unit, a second phase-shifted signal and outputting the signal as a second output signal; and a matching unit for matching the first output signal and the second output signal to a first transmission unit and a second transmission unit, respectively. The first transmission unit is for transmitting the first output signal from the matching unit to a load resistor, and the second transmission unit is for transmitting the second output signal from the matching unit to the load resistor.
摘要翻译：放大装置包括分割单元，用于将输入信号分成第一分割信号和第二分割信号; 移相单元，用于分别移相第一分割信号和第二分割信号; 第一放大单元，用于放大第一相移信号并输出该信号作为第一输出信号; 第二放大单元，用于以与第一放大单元完全相同的方式放大第二相移信号并输出该信号作为第二输出信号; 以及匹配单元，用于将第一输出信号和第二输出信号分别匹配到第一传输单元和第二传输单元。第一传输单元用于将第一输出信号从匹配单元发送到负载电阻器，第二传输单元用于将第二输出信号从匹配单元发送到负载电阻器。

7. 发明申请

US20090231032A1 LINC amplifying device 有权
标题翻译： LINC放大器
公开(公告)号：US20090231032A1
公开(公告)日：2009-09-17
申请号：US12379137
申请日：2009-02-13
申请人： Manabu Nakamura , Taizo Ito , Yoichi Okubo , Naoki Hongo
发明人： Manabu Nakamura , Taizo Ito , Yoichi Okubo , Naoki Hongo
IPC分类号： H03F3/68
CPC分类号： H03F1/0294 , H03F1/56 , H03F3/602 , H03F2200/222 , H03F2200/387 , H03F2200/423
摘要： An amplifying apparatus includes a splitting unit for splitting an input signal into a first split signal and a second split signal; phase-shifting unit for phase-shifting the first split signal and the second split signal, respectively; a first amplifying unit for amplifying a first phase-shifted signal and outputting the signal as a first output signal; a second amplifying unit for amplifying, in a substantially identical manner to the first amplifying unit, a second phase-shifted signal and outputting the signal as a second output signal; and a matching unit for matching the first output signal and the second output signal to a first transmission unit and a second transmission unit, respectively. The first transmission unit is for transmitting the first output signal from the matching unit to a load resistor, and the second transmission unit is for transmitting the second output signal from the matching unit to the load resistor.
摘要翻译：放大装置包括分割单元，用于将输入信号分成第一分割信号和第二分割信号; 移相单元，用于分别移相第一分割信号和第二分割信号; 第一放大单元，用于放大第一相移信号并输出该信号作为第一输出信号; 第二放大单元，用于以与第一放大单元完全相同的方式放大第二相移信号并输出该信号作为第二输出信号; 以及匹配单元，用于将第一输出信号和第二输出信号分别匹配到第一传输单元和第二传输单元。第一传输单元用于将第一输出信号从匹配单元发送到负载电阻器，第二传输单元用于将第二输出信号从匹配单元发送到负载电阻器。

8. 发明授权

US06931239B2 Peak limiter and multi-carrier amplification apparatus 有权
标题翻译：峰值限幅器和多载波放大装置
公开(公告)号：US06931239B2
公开(公告)日：2005-08-16
申请号：US10205563
申请日：2002-07-26
申请人： Naoki Hongo , Yoichi Okubo , Masaki Suto , Masato Horaguchi , Toshio Takada , Tetsuhiko Miyatani
发明人： Naoki Hongo , Yoichi Okubo , Masaki Suto , Masato Horaguchi , Toshio Takada , Tetsuhiko Miyatani
IPC分类号： H03G11/04 , H04L27/26 , H04B1/02 , H04B1/04
CPC分类号： H03G11/04 , H04L27/2623
摘要： A peak limiter for use in a system for amplifying a multi-carrier signal receives a baseband signal of each carrier of the multi-carrier signal. The multi-carrier signal is computationally estimated to have carriers combined in an RF band, and obtains power information of the multi-carrier signal to limit an amplitude of the baseband signal based on the power information of the estimated multi-carrier signal to thereby provide peak-limited baseband signals. Thus, the distortion generated by performing the unnecessary peak limitation can be effectively prevented to thereby improve the reliability of the entire system.
摘要翻译：用于放大多载波信号的系统中的峰值限制器接收多载波信号的每个载波的基带信号。计算地估计多载波信号使载波组合在RF频带中，并且基于估计的多载波信号的功率信息获得多载波信号的功率信息以限制基带信号的幅度，从而提供峰值限制基带信号。因此，可以有效地防止通过执行不必要的峰值限制而产生的失真，从而提高整个系统的可靠性。

9. 发明授权

US06741128B2 Distortion canceling circuit 失效
标题翻译：失真消除电路
公开(公告)号：US06741128B2
公开(公告)日：2004-05-25
申请号：US10131131
申请日：2002-04-25
申请人： Yoichi Okubo , Kiyoshi Funada , Masaki Suto , Masato Horaguchi , Toshio Takada , Naoki Hongo
发明人： Yoichi Okubo , Kiyoshi Funada , Masaki Suto , Masato Horaguchi , Toshio Takada , Naoki Hongo
IPC分类号： H03F126
CPC分类号： H03F1/3247 , H03F1/3205 , H03F1/3282 , H03F1/3288 , H03F2200/102 , H03F2201/3206 , H03F2201/3233
摘要： There is provided a distortion canceling circuit for reducing an unbalance between a higher and a lower 3rd order distortion at frequencies of (2·f2−f1) and (2·f1−f2), respectively, the distortions being generated by an amplifier which amplifies an input signal having at least two frequency components, i.e., f1 and f2. Phase modulation control means supply a control signal, which has a difference frequency of (f2−f1), to phase modulation means, the control signal being generated based on the amplified input signal outputted from the amplifier. The phase modulation means performs phase modulation on the amplified input signal based on the supplied control signal to thereby generate a higher and a lower side-band signal having frequencies of (2·f2−f1) and (2·f1−f2), respectively, each of which has an identical amplitude and a phase difference of 180° with respect to each other. The distortion canceling circuit reduces the unbalance by using the side-band signals.
摘要翻译：提供了一种用于减小在（2.f2-f1）和（2.f1-f2）频率处的较高和较低三阶失真之间的不平衡的失真消除电路，失真是由放大器具有至少两个频率分量的输入信号，即f1和f2。相位调制控制装置将具有差分频率（f2-f1）的控制信号提供给相位调制装置，该控制信号是根据从放大器输出的放大输入信号产生的。相位调制装置基于所提供的控制信号对放大的输入信号执行相位调制，从而分别产生频率为（2.f2-f1）和（2.f1-f2）的较高和较低的边带信号，其中的每一个具有相同的振幅和相对于彼此为180°的相位差。失真消除电路通过使用边带信号来减少不平衡。

10. 发明授权

US06856196B2 Distortion compensator 有权
标题翻译：失真补偿器
公开(公告)号：US06856196B2
公开(公告)日：2005-02-15
申请号：US10600594
申请日：2003-06-23
申请人： Yoichi Okubo , Kiyoshi Funada , Yasuo Sera , Masaki Suto , Masato Horaguchi , Kazuyoshi Sato , Toshio Takada , Tetsuhiko Miyatani , Naoki Hongo
发明人： Yoichi Okubo , Kiyoshi Funada , Yasuo Sera , Masaki Suto , Masato Horaguchi , Kazuyoshi Sato , Toshio Takada , Tetsuhiko Miyatani , Naoki Hongo
IPC分类号： H03F1/32 , H04B1/04 , H03G3/20 , H03F1/26
CPC分类号： H03F1/3247 , H03F1/3282 , H03F2200/102
摘要： A distortion compensator that compensates for distortion arising in a main amplifier 10 that amplifies a signal effectively compensates for third order distortion which is unbalanced between the higher frequency band and lower frequency band. An amplitude detector 3 detects the level of a signal subject to amplification and a signal level change direction detection means 7 detects the direction of change in the level of the signal. A signal level change control means 4-8 stores the correspondence between the signal level and the mode of changing the signal in order to compensate for distortion for when the direction of change in the signal level is positive and when it is negative, and controls a signal change means 9 so that the amplitude and phase of the signal is changed in a mode of changing the signal corresponding to the detected direction of change in the signal level and the detected signal level. A signal change control content updating means 11-13 updates the content of this correspondence so that the distortion contained in the signal after amplification is reduced.
摘要翻译：补偿放大信号的主放大器10中出现的失真的失真补偿器有效地补偿在较高频带和较低频带之间不平衡的三阶失真。振幅检测器3检测经放大的信号的电平，信号电平变化方向检测装置7检测信号电平的变化方向。信号电平变化控制装置4-8存储信号电平和改变信号的模式之间的对应关系，以便当信号电平的变化方向为正时和当它为负时补偿失真，并且控制一个信号改变装置9，使得信号的幅度和相位在改变与检测到的信号电平方向和检测信号电平相对应的信号的模式下改变。信号改变控制内容更新装置11-13更新该对应的内容，使得放大后的信号中包含的失真减少。

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