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公开(公告)号：US06933780B2
公开(公告)日：2005-08-23
申请号：US09772883
申请日：2001-01-31
申请人： Seiji Fujiwara , Toru Matsuura , Kaoru Ishida , Makoto Sakakura
发明人： Seiji Fujiwara , Toru Matsuura , Kaoru Ishida , Makoto Sakakura
CPC分类号： H03F1/3276
摘要： A predistortion circuit has an input terminal for inputting a predetermined signal; a nonlinear device directly or indirectly connected to the input terminal; a bias supply circuit for applying a voltage to the nonlinear device; specific-frequency suppressing means connected to one side or both sides of the nonlinear device directly without another intervening device and of suppressing all or part of such frequencies that are from a frequency corresponding to DC to a frequency corresponding to an occupied band width of an input signal inputted to the input terminal and/or suppressing at least one higher harmonic frequency of a carrier wave of the input signal; and an output terminal for outputting a signal.
摘要翻译： 预失真电路具有用于输入预定信号的输入端子; 直接或间接连接到输入端的非线性装置; 用于向非线性装置施加电压的偏置电源电路; 特定频率抑制装置直接连接到非线性装置的一侧或两侧，而没有另一个中间装置，并且将来自对应于DC的频率的全部或部分频率抑制到对应于输入的占用带宽的频率 输入到输入端子的信号和/或抑制输入信号的载波的至少一个高次谐波频率; 以及用于输出信号的输出端子。
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公开(公告)号：US06169461A
公开(公告)日：2001-01-02
申请号：US09123163
申请日：1998-07-27
申请人： Toshiaki Andoh , Makoto Sakakura , Takeshi Miura , Hiroaki Kosugi , Kaoru Ishida
发明人： Toshiaki Andoh , Makoto Sakakura , Takeshi Miura , Hiroaki Kosugi , Kaoru Ishida
IPC分类号： H03B518
CPC分类号： H03B5/1231 , H03B5/1218 , H03B5/1243 , H03B5/1847 , H03B2200/004 , H03B2200/0086 , H03B2200/0098
摘要： A high-frequency oscillating circuit that is not degraded by external electromagnetic interference. The high-frequency oscillating circuit includes first and second oscillating transistors wherein the bases are connected together directly or via a capacitor having a sufficiently low impedance at an oscillating frequency, and wherein a differential signal output is obtained between the emitters of the first and second oscillating transistors. Also provided is a resonating circuit formed in a module and a separate negative-resistance-generating circuit formed on an integrated circuit for achieving an oscillator that has a high Q factor and a high C/N ratio.
摘要翻译： 高频振荡电路不受外部电磁干扰的影响。 高频振荡电路包括第一和第二振荡晶体管，其中基极直接或通过振荡频率具有足够低阻抗的电容器连接在一起，并且其中在第一和第二振荡器的发射极之间获得差分信号输出 晶体管。 还提供了一种形成在模块中的谐振电路和形成在用于实现具有高Q因子和高C / N比的振荡器的集成电路上的单独的负电阻产生电路。
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公开(公告)号：US07876170B2
公开(公告)日：2011-01-25
申请号：US11790017
申请日：2007-04-23
申请人： Hisashi Adachi , Makoto Sakakura
发明人： Hisashi Adachi , Makoto Sakakura
IPC分类号： H03C3/06
CPC分类号： H03C3/0966 , H03C3/0925 , H03C3/0933 , H03C3/0941 , H03C3/095 , H03C3/0958 , H03L7/1976 , H03M7/3022 , H03M7/3037 , H03M7/304 , H04L27/12
摘要： A voltage controlled oscillator 1, a variable frequency divider 2, a phase comparator 3, and a loop filter 4 form a Phase Locked Loop (PLL). A sigma-delta modulator 5 sigma-delta modulates data obtained by adding a fractional part M2 of the frequency division factor data with modulation data X by using an output signal of the variable frequency divider 2 as a clock. An output signal of the sigma-delta modulator 5 is added to an integral part M1 of the frequency division factor data, and the resultant data becomes effective frequency division factor data 13 of the variable frequency divider 2. An output signal of the sigma-delta modulator 5 also becomes control data 14 after passing through a D/A converter 6, a low-pass filter 7, and an amplitude adjustment circuit 8. The control data 14 is inputted into a frequency modulation terminal of the voltage controlled oscillator 1. Therefore, it is possible to provide a frequency modulator that can use a reference signal source having no frequency modulation function, and perform modulation over a wide range of frequencies based on a digital modulation signal.
摘要翻译： 压控振荡器1，可变分频器2，相位比较器3和环路滤波器4形成锁相环（PLL）。 Σ-Δ调制器5σ-Δ调制通过使用可变分频器2的输出信号作为时钟将分频因子数据的分数部分M2与调制数据X相加获得的数据。 Σ-Δ调制器5的输出信号被加到分频因子数据的整数部分M1上，结果数据成为可变分频器2的有效分频系数数据13.Σ-Δ调制器5的输出信号 调制器5在通过D / A转换器6，低通滤波器7和幅度调整电路8之后也成为控制数据14.控制数据14被输入到压控振荡器1的调频端。因此 ，可以提供一种可以使用不具有频率调制功能的参考信号源的频率调制器，并且可以基于数字调制信号在宽范围的频率上进行调制。
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公开(公告)号：US20070200645A1
公开(公告)日：2007-08-30
申请号：US11790017
申请日：2007-04-23
申请人： Hisashi Adachi , Makoto Sakakura
发明人： Hisashi Adachi , Makoto Sakakura
CPC分类号： H03C3/0966 , H03C3/0925 , H03C3/0933 , H03C3/0941 , H03C3/095 , H03C3/0958 , H03L7/1976 , H03M7/3022 , H03M7/3037 , H03M7/304 , H04L27/12
摘要： A voltage controlled oscillator 1, a variable frequency divider 2, a phase comparator 3, and a loop filter 4 form a Phase Locked Loop (PLL). A sigma-delta modulator 5 sigma-delta modulates data obtained by adding a fractional part M2 of the frequency division factor data with modulation data X by using an output signal of the variable frequency divider 2 as a clock. An output signal of the sigma-delta modulator 5 is added to an integral part M1 of the frequency division factor data, and the resultant data becomes effective frequency division factor data 13 of the variable frequency divider 2. An output signal of the sigma-delta modulator 5 also becomes control data 14 after passing through a D/A converter 6, a low-pass filter 7, and an amplitude adjustment circuit 8. The control data 14 is inputted into a frequency modulation terminal of the voltage controlled oscillator 1. Therefore, it is possible to provide a frequency modulator that can use a reference signal source having no frequency modulation function, and perform modulation over a wide range of frequencies based on a digital modulation signal.
摘要翻译： 压控振荡器1，可变分频器2，相位比较器3和环路滤波器4形成锁相环（PLL）。 Σ-Δ调制器5σ-Δ调制通过使用可变分频器2的输出信号作为时钟将分频因子数据的分数部分M 2与调制数据X相加而获得的数据进行调制。 Σ-Δ调制器5的输出信号被加到分频系数数据的整数部分M 1，结果数据成为可变分频器2的有效分频系数数据13。 Σ-Δ调制器5的输出信号也经过D / A转换器6，低通滤波器7和振幅调整电路8后成为控制数据14。 控制数据14被输入到压控振荡器1的调频终端。因此，可以提供一种可以使用不具有频率调制功能的参考信号源的频率调制器，并且可以在宽频率范围内进行调制 基于数字调制信号。
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公开(公告)号：US06977548B2
公开(公告)日：2005-12-20
申请号：US10946301
申请日：2004-09-22
申请人： Toru Matsuura , Kaoru Ishida , Makoto Sakakura , Seiji Fujiwara
发明人： Toru Matsuura , Kaoru Ishida , Makoto Sakakura , Seiji Fujiwara
CPC分类号： H03F1/3241 , H03F1/3229 , H03F1/3247 , H03F1/3276 , H03F1/3282
摘要： An amplitude frequency characteristic adjustment circuit 106 is provided downstream of and connected to a distortion generation circuit 105. An amplitude difference between low-frequency-side and high-frequency-side distortion voltages is adjusted by the amplitude frequency characteristic adjustment circuit 106, and then their amplitudes and phases are adjusted by a vector adjustment circuit 107. This configuration makes it possible to suppress simultaneously both of low-frequency-side and high-frequency-side distortion voltages of a distortion generated by a wide-band class-AB power amplifier even if they are different in amplitude and phase.
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公开(公告)号：US06459915B2
公开(公告)日：2002-10-01
申请号：US09162619
申请日：1998-09-29
IPC分类号： H04B138
CPC分类号： H04B1/3877
摘要： A portable celullar phone apparatus includes a portable cellular phone and an external adapter for a portable cellular phone. It is possible to suppress an increase in output power of a portable cellular phone transmit amplifier due to a loss at a transmit switch associated with use of an external transmitting antenna by coupling a first output of the transmit switch to a portable cellular phone transmit amplifier and coupling a second output of the transmit switch to an input of a transmit amplifier part of a portable cellular phone external adapter. Deterioration of a NF of a receiving system due to a loss at a receive switch when using an external receiving antenna may be reduced by coupling a first input of a receive switch to a portable cellular phone receive amplifier and coupling a second input of the receive switch to an output of a receive amplifier part of the portable cellular phone external adapter.
摘要翻译： 一种便携式Celullar电话设备包括便携式蜂窝电话和用于便携式蜂窝电话的外部适配器。 通过将发送开关的第一输出耦合到便携式蜂窝电话发送放大器，由于与使用外部发送天线相关联的发送开关处的损失，可以抑制便携式蜂窝电话发送放大器的输出功率的增加，以及 将所述发射开关的第二输出耦合到便携式蜂窝电话外部适配器的发射放大器部分的输入端。 可以通过将接收开关的第一输入耦合到便携式蜂窝电话接收放大器并且将接收开关的第二输入耦合来减少由于在使用外部接收天线时在接收开关处的损耗而导致的接收系统的NF的劣化 到便携式蜂窝电话外部适配器的接收放大器部分的输出。
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公开(公告)号：US5559474A
公开(公告)日：1996-09-24
申请号：US450895
申请日：1995-05-26
摘要： In accordance with a loop open/close control signal, an analog switch closes or opens a loop including a voltage controlled oscillator, a variable frequency divider, a phase comparator, and a first loop filter, the analog switch, and a second loop filter. In order to reduce the change of frequency caused when the open loop state is set immediately after the output frequency is changed, the second loop filter uses a capacitor which shows properties of a small change of capacitance in response to an applied voltage and a small hysteresis. In another embodiment, the voltage controlled oscillator includes a second diode, one terminal of which is grounded, connected in reverses parallel to a first diode switch which switches the output oscillation frequency ranges of the voltage controlled oscillator.
摘要翻译： 根据环路开/关控制信号，模拟开关关闭或打开包括压控振荡器，可变分频器，相位比较器和第一环路滤波器，模拟开关和第二环路滤波器的回路。 为了减少在输出频率变化后立即设定开环状态时引起的频率变化，第二环路滤波器使用电容器，该电容器响应于所施加的电压和小的滞后而显示出小的电容变化的特性 。 在另一个实施例中，压控振荡器包括一个第二二极管，其一端接地，并联连接到第一二极管开关，第一二极管开关切换压控振荡器的输出振荡频率范围。
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公开(公告)号：US5475350A
公开(公告)日：1995-12-12
申请号：US127500
申请日：1993-09-28
申请人： Toru Yamada , Toshio Ishizaki , Yoshihiro Nakagawa , Makoto Sakakura , Koji Hashimoto , Toshiaki Nakamura
发明人： Toru Yamada , Toshio Ishizaki , Yoshihiro Nakagawa , Makoto Sakakura , Koji Hashimoto , Toshiaki Nakamura
摘要： A coupled capacitor substrate having thereon a plane capacitor which is integrally bonded on a dielectric resonator and a varactor which is mounted on the coupled capacitor substrate so as to couple the dielectric resonator via the plane capacitor.
摘要翻译： 一种耦合电容器基板，其上具有整体结合在介质谐振器上的平面电容器和安装在耦合的电容器基板上以便经由平面电容器耦合介质谐振器的变容二极管。
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公开(公告)号：US06960957B2
公开(公告)日：2005-11-01
申请号：US10395092
申请日：2003-03-25
申请人： Toru Matsuura , Kaoru Ishida , Makoto Sakakura , Seiji Fujiwara
发明人： Toru Matsuura , Kaoru Ishida , Makoto Sakakura , Seiji Fujiwara
CPC分类号： H03F1/3241 , H03F1/3229 , H03F1/3247 , H03F1/3276 , H03F1/3282
摘要： An amplitude frequency characteristic adjustment circuit 106 is provided downstream of and connected to a distortion generation circuit 105. An amplitude difference between low-frequency-side and high-frequency-side distortion voltages is adjusted by the amplitude frequency characteristic adjustment circuit 106, and then their amplitudes and phases are adjusted by a vector adjustment circuit 107. This configuration makes it possible to suppress simultaneously both of low-frequency-side and high-frequency-side distortion voltages of a distortion generated by a wide-band class-AB power amplifier even if they are different in amplitude and phase.
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10.发明申请PREDISTORTION CIRCUIT, LOW-DISTORTION POWER AMPLIFIER, AND CONTROL METHODS THEREFOR 有权预测电路，低失真功率放大器及其控制方法公开(公告)号：US20050237113A1
公开(公告)日：2005-10-27
申请号：US11100507
申请日：2005-04-07
申请人： Toru Matsuura , Kaoru Ishida , Makoto Sakakura , Seiji Fujiwara
发明人： Toru Matsuura , Kaoru Ishida , Makoto Sakakura , Seiji Fujiwara
CPC分类号： H03F1/3241 , H03F1/3229 , H03F1/3247 , H03F1/3276 , H03F1/3282
摘要： An amplitude frequency characteristic adjustment circuit 106 is provided downstream of and connected to a distortion generation circuit 105. An amplitude difference between low-frequency-side and high-frequency-side distortion voltages is adjusted by the amplitude frequency characteristic adjustment circuit 106, and then their amplitudes and phases are adjusted by a vector adjustment circuit 107. This configuration makes it possible to suppress simultaneously both of low-frequency-side and high-frequency-side distortion voltages of a distortion generated by a wide-band class-AB power amplifier even if they are different in amplitude and phase.
摘要翻译： 幅度频率特性调整电路106设置在失真产生电路105的下游并连接到失真产生电路105。 通过幅度频率特性调整电路106调整低频侧和高频侧失真电压之间的幅度差，然后通过矢量调整电路107调整其幅度和相位。 通过这种结构，即使幅度和相位不同，也能同时抑制由宽带AB类功率放大器产生的失真的低频侧和高频侧的失真电压。
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