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公开(公告)号：US07489910B2
公开(公告)日：2009-02-10
申请号：US11387568
申请日：2006-03-23
申请人： Takayuki Kato , Hiroshi Yoshida , Ichiro Seto , Keiichi Yamaguchi
发明人： Takayuki Kato , Hiroshi Yoshida , Ichiro Seto , Keiichi Yamaguchi
CPC分类号： H03F3/72 , H03F1/0288 , H03F3/24 , H03F3/602 , H03F2200/111 , H03F2200/423 , H03F2200/429 , H04B1/0483 , H04B2001/0408
摘要： There is provided with an amplifier comprising: first and second power amplifiers; a first path configured to output first and second input signals to the first and second power amplifiers; a second path configured to divide a first input signal, output one of divided signals to the first power amplifier and output the other divided signal to the second power amplifier; a first path changeover unit configured to change over the first and second paths; a third path configured to output first and second power amplified signals from the first and second power amplifiers; a fourth path configured to combines a first power amplified signal through an impedance conversion unit from the first power amplifier and a second power amplified signal from the second power amplifier at a combining point and output a combined signal; and a second path changeover unit configured to changeover the third and fourth paths.
摘要翻译： 提供了一种放大器，包括：第一和第二功率放大器; 第一路径，被配置为将第一和第二输入信号输出到所述第一和第二功率放大器; 第二路径，被配置为分割第一输入信号，将分频信号中的一个输出到第一功率放大器，并将另一个分频信号输出到第二功率放大器; 第一路径切换单元，被配置为切换第一和第二路径; 第三路径，被配置为从所述第一和第二功率放大器输出第一和第二功率放大信号; 第四路径，被配置为通过来自第一功率放大器的阻抗转换单元和来自第二功率放大器的组合点的第二功率放大信号组合第一功率放大信号并输出组合信号; 以及第二路径切换单元，被配置为切换第三路径和第四路径。
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公开(公告)号：US20060246855A1
公开(公告)日：2006-11-02
申请号：US11387568
申请日：2006-03-23
申请人： Takayuki Kato , Hiroshi Yoshida , Ichiro Seto , Keiichi Yamaguchi
发明人： Takayuki Kato , Hiroshi Yoshida , Ichiro Seto , Keiichi Yamaguchi
CPC分类号： H03F3/72 , H03F1/0288 , H03F3/24 , H03F3/602 , H03F2200/111 , H03F2200/423 , H03F2200/429 , H04B1/0483 , H04B2001/0408
摘要： There is provided with an amplifier comprising: first and second power amplifiers; a first path configured to output first and second input signals to the first and second power amplifiers; a second path configured to divide a first input signal, output one of divided signals to the first power amplifier and output the other divided signal to the second power amplifier; a first path changeover unit configured to change over the first and second paths; a third path configured to output first and second power amplified signals from the first and second power amplifiers; a fourth path configured to combines a first power amplified signal through an impedance conversion unit from the first power amplifier and a second power amplified signal from the second power amplifier at a combining point and output a combined signal; and a second path changeover unit configured to changeover the third and fourth paths.
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公开(公告)号：US08351875B2
公开(公告)日：2013-01-08
申请号：US12585443
申请日：2009-09-15
IPC分类号： H04B1/04
CPC分类号： H03F1/3258 , H03F1/3247 , H03F3/19 , H03F3/245 , H03F2200/204 , H03F2200/336 , H03F2200/78 , H04B1/0475
摘要： A distortion compensator for reducing a level of a distortion component included in an output analog signal of an amplifier, includes: an A/D converter to convert the output analog signal of the amplifier into a digital output signal; a comparator to generate a distortion characteristic of the amplifier based on a digital input signal and the digital output signal; a rate controller to control a sampling rate of the A/D converter based on the digital input signal and the digital output signal; a predistorter to multiply the digital input signal and a compensation value for compensating the amplifier, the compensation value being calculated based on the digital input signal and the distortion characteristic of the amplifier; and a D/A converter to convert multiplication result of the predistorter into an analog input signal to input the analog input signal to the amplifier.
摘要翻译： 一种用于降低包括在放大器的输出模拟信号中的失真分量电平的失真补偿器，包括：A / D转换器，用于将放大器的输出模拟信号转换为数字输出信号; 比较器，用于基于数字输入信号和数字输出信号产生放大器的失真特性; 速率控制器，其基于所述数字输入信号和所述数字输出信号来控制所述A / D转换器的采样率; 用于对数字输入信号进行倍增的预失真器和用于补偿放大器的补偿值，基于数字输入信号和放大器的失真特性计算补偿值; 以及D / A转换器，用于将预失真器的相乘结果转换为模拟输入信号，以将模拟输入信号输入到放大器。
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公开(公告)号：US20120154034A1
公开(公告)日：2012-06-21
申请号：US13402643
申请日：2012-02-22
IPC分类号： H03F3/68
CPC分类号： H03F1/0288 , H03F3/195 , H03F3/24 , H03F3/602 , H03F3/68 , H03F2200/451
摘要： According to an embodiment, a Doherty amplifier system has a first Doherty amplifier and a second Doherty amplifier. The first Doherty amplifier operates in a SISO communication mode and in a MIMO communication mode. The first Doherty amplifier comprises a first carrier amplifier and a first peak amplifier. The second Doherty amplifier operates in the MIMO communication mode but not operates in the SISO communication mode. The second Doherty amplifier comprises a second carrier amplifier and a second peak amplifier. A distance between the first carrier amplifier and the second carrier amplifier is less than any of a distance between any of the first carrier amplifier and the second peak amplifier and any of the first peak amplifier and the second peak amplifier. In the SISO communication mode, heat generated by the first Doherty amplifier is conducted to the second Doherty amplifier to warm up the second Doherty amplifier.
摘要翻译： 根据实施例，Doherty放大器系统具有第一Doherty放大器和第二Doherty放大器。 第一个Doherty放大器以SISO通信模式和MIMO通信模式工作。 第一Doherty放大器包括第一载波放大器和第一峰值放大器。 第二个Doherty放大器在MIMO通信模式下工作，但在SISO通信模式下不工作。 第二个Doherty放大器包括第二载波放大器和第二峰值放大器。 第一载波放大器和第二载波放大器之间的距离小于第一载波放大器和第二峰值放大器以及第一峰值放大器和第二峰值放大器中的任何一个之间的距离中的任何一个。 在SISO通信模式中，第一个Doherty放大器产生的热量传导到第二个Doherty放大器，以加热第二个Doherty放大器。
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公开(公告)号：US20100159856A1
公开(公告)日：2010-06-24
申请号：US12585443
申请日：2009-09-15
CPC分类号： H03F1/3258 , H03F1/3247 , H03F3/19 , H03F3/245 , H03F2200/204 , H03F2200/336 , H03F2200/78 , H04B1/0475
摘要： A distortion compensator for reducing a level of a distortion component included in an output analog signal of an amplifier, includes: an A/D converter to convert the output analog signal of the amplifier into a digital output signal; a comparator to generate a distortion characteristic of the amplifier based on a digital input signal and the digital output signal; a rate controller to control a sampling rate of the A/D converter based on the digital input signal and the digital output signal; a predistorter to multiply the digital input signal and a compensation value for compensating the amplifier, the compensation value being calculated based on the digital input signal and the distortion characteristic of the amplifier; and a D/A converter to convert multiplication result of the predistorter into an analog input signal to input the analog input signal to the amplifier.
摘要翻译： 一种用于降低包括在放大器的输出模拟信号中的失真分量电平的失真补偿器，包括：A / D转换器，用于将放大器的输出模拟信号转换为数字输出信号; 比较器，用于基于数字输入信号和数字输出信号产生放大器的失真特性; 速率控制器，其基于所述数字输入信号和所述数字输出信号来控制所述A / D转换器的采样率; 用于对数字输入信号进行倍增的预失真器和用于补偿放大器的补偿值，基于数字输入信号和放大器的失真特性计算补偿值; 以及D / A转换器，用于将预失真器的相乘结果转换为模拟输入信号，以将模拟输入信号输入到放大器。
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公开(公告)号：US08237498B2
公开(公告)日：2012-08-07
申请号：US13402643
申请日：2012-02-22
IPC分类号： H03F3/68
CPC分类号： H03F1/0288 , H03F3/195 , H03F3/24 , H03F3/602 , H03F3/68 , H03F2200/451
摘要： According to an embodiment, a Doherty amplifier system has a first Doherty amplifier and a second Doherty amplifier. The first Doherty amplifier operates in a SISO communication mode and in a MIMO communication mode. The first Doherty amplifier comprises a first carrier amplifier and a first peak amplifier. The second Doherty amplifier operates in the MIMO communication mode but not operates in the SISO communication mode. The second Doherty amplifier comprises a second carrier amplifier and a second peak amplifier. A distance between the first carrier amplifier and the second carrier amplifier is less than any of a distance between any of the first carrier amplifier and the second peak amplifier and any of the first peak amplifier and the second peak amplifier. In the SISO communication mode, heat generated by the first Doherty amplifier is conducted to the second Doherty amplifier to warm up the second Doherty amplifier.
摘要翻译： 根据实施例，Doherty放大器系统具有第一Doherty放大器和第二Doherty放大器。 第一个Doherty放大器以SISO通信模式和MIMO通信模式工作。 第一Doherty放大器包括第一载波放大器和第一峰值放大器。 第二个Doherty放大器在MIMO通信模式下工作，但在SISO通信模式下不工作。 第二个Doherty放大器包括第二载波放大器和第二峰值放大器。 第一载波放大器和第二载波放大器之间的距离小于第一载波放大器和第二峰值放大器以及第一峰值放大器和第二峰值放大器中的任何一个之间的距离中的任何一个。 在SISO通信模式中，第一个Doherty放大器产生的热量传导到第二个Doherty放大器，以加热第二个Doherty放大器。
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公开(公告)号：US07555274B2
公开(公告)日：2009-06-30
申请号：US11280315
申请日：2005-11-17
申请人： Takehiko Toyoda , Hiroshi Yoshida , Takayuki Kato
发明人： Takehiko Toyoda , Hiroshi Yoshida , Takayuki Kato
CPC分类号： H03G3/3068 , H03G3/3052 , H04B1/30
摘要： A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback control on the amplified B/B signal, and a gain controller which controls at least the gain of the LNA, the gain controller including a signal intensity detector which detects the intensity of the amplified B/B signal, a gain selector which selects a desired one of preset gains on the basis of the detected intensity, a timing controller which controls timing of switching to the selected desired gain, and a gain control signal generator which changes, in accordance with the controlled timing, the interval at which an LNA gain control signal is generated.
摘要翻译： 无线电接收机包括放大An RF信号的LNA，使用LO信号将放大的RF信号直接解调为B / B信号的正交解调器，放大B / B信号的VGA; DC偏移消除器，其执行 放大的B / B信号的反馈控制以及至少控制LNA的增益的增益控制器，增益控制器包括检测放大的B / B信号的强度的信号强度检测器，选择一个 基于检测到的强度来预期的预设增益之一，控制切换到所选择的期望增益的定时的定时控制器;以及增益控制信号发生器，其根据受控定时改变LNA增益的间隔 产生控制信号。
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公开(公告)号：US07127268B2
公开(公告)日：2006-10-24
申请号：US10175783
申请日：2002-06-21
申请人： Takayuki Kato , Hiroshi Yoshida
发明人： Takayuki Kato , Hiroshi Yoshida
IPC分类号： H04B1/38
CPC分类号： H04B1/406
摘要： According to the present invention, there is disclosed a radio transmitter comprising: a signal processing section which outputs a control signal for designating one of first and second communication systems and a base band signal; a frequency synthesizer for outputting an LO signal corresponding to the control signal; a quadrature modulator into which the base band signal and LO signal are inputted; a first terminal for the first communication system; a second terminal for the second communication system; a first radio section which is disposed between the quadrature modulator and the first terminal and corresponds to the first communication system; a second radio section which is disposed between the quadrature modulator and the second terminal and corresponds to the second communication system; and a switch which passes an output signal from the quadrature modulator through any one of the first and second radio sections in response to the control signal.
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公开(公告)号：US20060068734A1
公开(公告)日：2006-03-30
申请号：US11280315
申请日：2005-11-17
申请人： Takehiko Toyoda , Hiroshi Yoshida , Takayuki Kato
发明人： Takehiko Toyoda , Hiroshi Yoshida , Takayuki Kato
CPC分类号： H03G3/3068 , H03G3/3052 , H04B1/30
摘要： A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback control on the amplified B/B signal, and a gain controller which controls at least the gain of the LNA, the gain controller including a signal intensity detector which detects the intensity of the amplified B/B signal, a gain selector which selects a desired one of preset gains on the basis of the detected intensity, a timing controller which controls timing of switching to the selected desired gain, and a gain control signal generator which changes, in accordance with the controlled timing, the interval at which an LNA gain control signal is generated.
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公开(公告)号：US07272371B2
公开(公告)日：2007-09-18
申请号：US10327104
申请日：2002-12-24
申请人： Takehiko Toyoda , Hiroshi Yoshida , Takayuki Kato
发明人： Takehiko Toyoda , Hiroshi Yoshida , Takayuki Kato
CPC分类号： H03G3/3068 , H03G3/3052 , H04B1/30
摘要： A radio receiver comprises an LNA which amplifies An RF signal, a quadrature demodulator which directly demodulates the amplified RF signal into a B/B signal, using a LO signal, a VGA which amplifies the B/B signal, a DC offset canceller which executes feedback control on the amplified B/B signal, and a gain controller which controls at least the gain of the LNA, the gain controller including a signal intensity detector which detects the intensity of the amplified B/B signal, a gain selector which selects a desired one of preset gains on the basis of the detected intensity, a timing controller which controls timing of switching to the selected desired gain, and a gain control signal generator which changes, in accordance with the controlled timing, the interval at which an LNA gain control signal is generated.
摘要翻译： 无线电接收机包括放大An RF信号的LNA，使用LO信号将放大的RF信号直接解调为B / B信号的正交解调器，放大B / B信号的VGA; DC偏移消除器，其执行 放大的B / B信号的反馈控制以及至少控制LNA的增益的增益控制器，增益控制器包括检测放大的B / B信号的强度的信号强度检测器，选择 基于检测到的强度来预期的预设增益之一，控制切换到所选择的期望增益的定时的定时控制器;以及增益控制信号发生器，其根据受控定时改变LNA增益的间隔 产生控制信号。
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