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1. 发明授权

US5852384A Dual band oscillator circuit using strip line resonators 失效
标题翻译：双频振荡器电路采用带状线谐振器
公开(公告)号：US5852384A
公开(公告)日：1998-12-22
申请号：US844039
申请日：1997-04-18
申请人： Makoto Sakakura , Hisanaga Miyoshi , Kouji Hashimoto , Nobuo Fuse , Hiroaki Kosugi , Kaoru Ishida
发明人： Makoto Sakakura , Hisanaga Miyoshi , Kouji Hashimoto , Nobuo Fuse , Hiroaki Kosugi , Kaoru Ishida
IPC分类号： H03B5/18 , H03B5/12
CPC分类号： H03B5/1847
摘要： A dual band oscillator circuit according to the present invention comprises an oscillator circuit portion that oscillates at a first frequency, an oscillator circuit portion that oscillates at a second frequency, a buffer amplifier circuit portion to which an output of the first oscillator circuit portion is input through a first stage-to-stage coupling element and an output of the second oscillator circuit portion is input through a second stage-to-stage coupling element. Operation is switched between the first and second oscillator circuits by an externally applied control voltage signal.
摘要翻译：根据本发明的双频带振荡器电路包括以第一频率振荡的振荡器电路部分，以第二频率振荡的振荡器电路部分，输入第一振荡器电路部分的输出的缓冲放大器电路部分通过第一级到级耦合元件，并且第二振荡器电路部分的输出通过第二级到级耦合元件输入。通过外部施加的控制电压信号在第一和第二振荡器电路之间切换操作。

2. 发明授权

US06169461A High-frequency oscillating circuit 失效
标题翻译：高频振荡电路
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。

3. 发明授权

US07038557B2 Antenna duplexer and mobile communication device using the same 失效
公开(公告)号：US07038557B2
公开(公告)日：2006-05-02
申请号：US10085264
申请日：2002-02-27
申请人： Hiroyuki Nakamura , Toshio Ishizaki , Hisashi Adachi , Makoto Sakakura , Hiroaki Kosugi , Hiroyuki Itokawa , Toshiaki Nakamura
发明人： Hiroyuki Nakamura , Toshio Ishizaki , Hisashi Adachi , Makoto Sakakura , Hiroaki Kosugi , Hiroyuki Itokawa , Toshiaki Nakamura
IPC分类号： H03H7/46
CPC分类号： H04B1/0057 , H04B1/48 , H04B1/52
摘要： An antenna duplexer has an antenna terminal; a transmitting phase-shift circuit, one side of which is connected to the antenna terminal; a receiving phase-shift circuit, one side of which is connected to the antenna terminal; a transmitting filter connected to the other side of the transmitting phase-shift circuit and a transmitting terminal; and a receiving filter connected to the other side of the receiving phase-shift circuit and a receiving terminal; wherein the transmitting filter and/or the receiving filter is a composite filter, and the composite filter attains a characteristic having an attenuation pole at simultaneous transmission and reception time when transmission and reception are simultaneously performed, and controls respective impedances by the transmitting phase-shift circuit and the receiving phase-shift circuit to operate as a sharing unit and attains a characteristic where the attenuation pole is removed at non simultaneous transmission and reception time when transmission and reception are not performed simultaneously.

4. 发明授权

US06933780B2 Predistortion circuit and power amplifier 有权
标题翻译：预失真电路和功率放大器
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
IPC分类号： H03F1/32 , H03F1/26
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。

5. 发明授权

US06459915B2 External adapter for a portable cellular phone 失效
标题翻译：用于便携式手机的外部适配器
公开(公告)号：US06459915B2
公开(公告)日：2002-10-01
申请号：US09162619
申请日：1998-09-29
申请人： Hiroyuki Nakamura , Makoto Sakakura , Takaaki Maegawa , Hiroaki Kosugi , Kenichi Takahashi
发明人： Hiroyuki Nakamura , Makoto Sakakura , Takaaki Maegawa , Hiroaki Kosugi , Kenichi Takahashi
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。

6. 发明授权

US5559474A Frequency synthesizer with controllable loop filter 失效
标题翻译：具有可控环路滤波器的频率合成器
公开(公告)号：US5559474A
公开(公告)日：1996-09-24
申请号：US450895
申请日：1995-05-26
申请人： Takayuki Matsumoto , Hisashi Adachi , Hiroaki Kosugi , Makoto Sakakura
发明人： Takayuki Matsumoto , Hisashi Adachi , Hiroaki Kosugi , Makoto Sakakura
IPC分类号： H03L7/093 , H03L7/107 , H03L7/187 , H03L7/08 , H03L7/099 , H03L7/18
CPC分类号： H03L7/093 , H03L7/107 , H03L7/187
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。

7. 发明授权

US06269253B1 Multi-mode wireless communication system 失效
标题翻译：多模式无线通信系统
公开(公告)号：US06269253B1
公开(公告)日：2001-07-31
申请号：US09162210
申请日：1998-09-28
申请人： Takaaki Maegawa , Hiroyuki Nakamura , Makoto Sakakura , Hiroaki Kosugi , Junichi Takada
发明人： Takaaki Maegawa , Hiroyuki Nakamura , Makoto Sakakura , Hiroaki Kosugi , Junichi Takada
IPC分类号： H04B138
CPC分类号： H04B1/0057 , H03D7/16 , H03D7/163 , H04B1/005 , H04B1/006 , H04B1/405 , H04B1/406
摘要： A multi-mode wireless system having a modulator (11) for modulating two system signals (low frequency signals for the GSM system and high frequency signals for the DCS1800 system), a first local oscillator (14) for oscillating a signal of a predetermined frequency, a n-divider (15) for dividing a signal from the first local oscillator by a factor of n, a high frequency mixer (13) for converting a signal to a high frequency side output (17) according to a signal output from the first local oscillator (14) and a signal output from the modulator (11), and a low frequency mixer (12) for outputting a signal to a low frequency mixer (16) according to an n-divided signal and a signal from the modulator (11).
摘要翻译：一种具有用于调制两个系统信号的调制器（11）的多模式无线系统（用于GSM系统的低频信号和用于DCS1800系统的高频信号），用于振荡预定频率的信号的第一本地振荡器（14），用于将来自第一本地振荡器的信号除以因子n的n分频器（15），用于根据从第一本地振荡器输出的信号将信号转换为高频侧输出（17）的高频混频器（13）第一本地振荡器（14）和从调制器（11）输出的信号，以及低频混频器（12），用于根据n分频信号和来自调制器的信号将信号输出到低频混频器（16）（11）。

8. 发明授权

US06977548B2 Predistortion circuit, low-distortion power amplifier, and control methods therefor 有权
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
IPC分类号： H03F1/26 , H03F1/32
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.

9. 发明授权

US06960957B2 Predistortion circuit, low-distortion power amplifier, and control methods therefor 有权
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
IPC分类号： H03F1/26 , H03F1/32
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.

10. 发明申请

US20050237113A1 PREDISTORTION CIRCUIT, LOW-DISTORTION POWER AMPLIFIER, AND CONTROL METHODS THEREFOR 有权
标题翻译：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
IPC分类号： H03F1/26 , H03F1/32
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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