公开(公告)号：US20100260295A1

公开(公告)日：2010-10-14

申请号：US12159491

申请日：2007-11-08

申请人： Eiji Okada ,  Takeshi Fujii ,  Hiroaki Ozeki

发明人： Eiji Okada ,  Takeshi Fujii ,  Hiroaki Ozeki

IPC分类号： H04B1/10 ,  H03H11/04 ,  H04L27/00

CPC分类号： H04B1/1036 ,  H03H11/1252 ,  H03H11/1291 ,  H04W52/0238 ,  Y02D70/164 ,  Y02D70/40

摘要： Filter circuit includes Nth-order active filters switching circuit which switches shorting or non-shorting of active filter, and power-supply control circuit which controls such that a power supply of active filter is turned off when switching circuit shorts active filter. A receiver employing filter circuit turns off the power supply of active filter not needed when no interference wave exists within a given range from a desired frequency band. The foregoing structure allows lowering the power consumption of filter circuit.

摘要翻译： 滤波电路包括有源滤波器的短路或不短路的N阶有源滤波器开关电路，以及开关电路短路有源滤波器时有源滤波器的电源被切断的电源控制电路。 采用滤波电路的接收器在不期望频带的给定范围内不存在干扰波时，关闭不需要的有源滤波器的电源。 上述结构允许降低滤波电路的功耗。

公开(公告)号：US08208590B2

公开(公告)日：2012-06-26

申请号：US12159491

申请日：2007-11-08

申请人： Eiji Okada ,  Takeshi Fujii ,  Hiroaki Ozeki

发明人： Eiji Okada ,  Takeshi Fujii ,  Hiroaki Ozeki

IPC分类号： H04B1/10

CPC分类号： H04B1/1036 ,  H03H11/1252 ,  H03H11/1291 ,  H04W52/0238 ,  Y02D70/164 ,  Y02D70/40

摘要： Filter circuit includes Nth-order active filters switching circuit which switches shorting or non-shorting of active filter, and power-supply control circuit which controls such that a power supply of active filter is turned off when switching circuit shorts active filter. A receiver employing filter circuit turns off the power supply of active filter not needed when no interference wave exists within a given range from a desired frequency band. The foregoing structure allows lowering the power consumption of filter circuit.

摘要翻译： 滤波电路包括有源滤波器的短路或不短路的N阶有源滤波器开关电路，以及开关电路短路有源滤波器时有源滤波器的电源被切断的电源控制电路。 采用滤波电路的接收器在不期望频带的给定范围内不存在干扰波时，关闭不需要的有源滤波器的电源。 上述结构允许降低滤波电路的功耗。

公开(公告)号：US08244197B2

公开(公告)日：2012-08-14

申请号：US12304084

申请日：2008-03-27

申请人： Takeshi Fujii ,  Hiroaki Ozeki ,  Mineyuki Iwaida

发明人： Takeshi Fujii ,  Hiroaki Ozeki ,  Mineyuki Iwaida

IPC分类号： H04B1/10

CPC分类号： H03H7/20 ,  H04B1/28

摘要： In an image rejection mixer, when a signal in the first radio frequency band is inputted to an input terminal, the first mixer and the second mixer convert the input signal in the first radio frequency band to a signal in the first intermediate frequency band by using the first local signal from a local signal oscillator, and a filter circuit attenuates an image interfering signal existing in the first intermediate frequency band by means of the first attenuation band. Also, when a signal in the second radio frequency band is inputted to the input terminal, the first mixer and the second mixer convert the input signal in the second radio frequency band to a signal in the second intermediate frequency band by using the second local signal from the local signal oscillator, and the filter circuit attenuates an image interfering signal existing in the second intermediate frequency band by means of the second attenuation band that is narrower than the first attenuation band.

摘要翻译： 在图像抑制混频器中，当第一无线电频带中的信号被输入到输入端时，第一混频器和第二混频器通过使用第一混频器和第二混频器将第一无线电频带中的输入信号转换为第一中频带中的信号 来自本地信号振荡器的第一本地信号，以及滤波器电路借助于第一衰减频带衰减存在于第一中频带中的图像干扰信号。 此外，当第二无线电频带中的信号被输入到输入端时，第一混频器和第二混频器通过使用第二本地信号将第二无线电频带中的输入信号转换为第二中频带中的信号 并且滤波器电路通过比第一衰减频带窄的第二衰减频带衰减存在于第二中频带中的图像干扰信号。

公开(公告)号：US20110181354A1

公开(公告)日：2011-07-28

申请号：US13121801

申请日：2009-09-29

申请人： Takashi Umeda ,  Hiroaki Ozeki ,  Takeshi Fujii ,  Susumu Fukushima

发明人： Takashi Umeda ,  Hiroaki Ozeki ,  Takeshi Fujii ,  Susumu Fukushima

IPC分类号： H03G3/20

CPC分类号： H03G3/3052

摘要： A reception device according to the present invention includes: a step-variable gain amplifier; and a controller operable to control the gain of the step-variable gain amplifier based on the signal quality value of a demodulator. The gain of the step-variable gain amplifier varies within N gains from a first gain to an N-th gain, and the controller changes a number of the gain one by one when changing the gain of the step-variable gain amplifier. Thus, it is possible to realize a reception device using the step-variable gain amplifier requiring a low control voltage as compared to a continuously-variable gain amplifier.

摘要翻译： 根据本发明的接收装置包括：可变增益放大器; 以及控制器，其可操作以基于解调器的信号质量值来控制所述有级增益放大器的增益。 阶跃式增益放大器的增益在从第一增益到第N增益的N个增益中变化，并且当改变阶梯可变增益放大器的增益时，控制器逐个改变增益的数量。 因此，与连续可变增益放大器相比，可以实现使用需要较低控制电压的可变增益放大器的接收装置。

公开(公告)号：US20110019783A1

公开(公告)日：2011-01-27

申请号：US12933163

申请日：2009-04-08

申请人： Yusuke Nakano ,  Hiroaki Ozeki ,  Yasunobu Tsukio ,  Takeshi Fujii

发明人： Yusuke Nakano ,  Hiroaki Ozeki ,  Yasunobu Tsukio ,  Takeshi Fujii

IPC分类号： H04L27/06

CPC分类号： H03J3/08 ,  H03H11/126 ,  H03H11/1286 ,  H03H11/1291

摘要： A receiver includes an oscillator for generating a local oscillator signal, a frequency converter for heterodyning a received signal of one frequency band or a plurality of frequency bands into an intermediate frequency (IF) signals with using the local oscillator signal, a filter connected to an output of the frequency converter and having a cut-off frequency changeable, an analog-digital (AD) converter connected to an output of the filter to convert an analog signal of one frequency band or a plurality of frequency bands into a digital signal, a pre-stage detector connected to an output of the AD converter or connected between the filter and the AD converter to detect a signal level, and a controller for controlling the cut-off frequency of the filter based on the signal level detected by the pre-stage detector.

摘要翻译： 接收机包括用于产生本地振荡器信号的振荡器，用于使用本地振荡器信号将一个频带或多个频带的接收信号外差分成中频（IF）信号的频率转换器，连接到 频率转换器的输出和截止频率可变的模拟数字（AD）转换器，连接到滤波器的输出，以将一个频带或多个频带的模拟信号转换为数字信号， 前级检测器连接到AD转换器的输出端或连接在滤波器和AD转换器之间以检测信号电平;以及控制器，用于根据预处理器检测到的信号电平来控制滤波器的截止频率， 舞台探测器。

公开(公告)号：US07457600B2

公开(公告)日：2008-11-25

申请号：US10526472

申请日：2004-06-24

申请人： Takeshi Fujii ,  Kenji Adachi ,  Hiroaki Ozeki ,  Mineyuki Iwaida

发明人： Takeshi Fujii ,  Kenji Adachi ,  Hiroaki Ozeki ,  Mineyuki Iwaida

IPC分类号： H04B7/00

CPC分类号： H03L7/099 ,  H03L7/10 ,  H03L2207/06

摘要： VCO (voltage-controlled oscillator) device used for a radio unit such as a television broadcast receiver. A VCO device oscillating in a wide band of oscillation frequency and capable of realizing low power consumption is provided. VCO circuit group 4 oscillates signals of frequencies corresponding to control voltage Vt applied to frequency control voltage terminal 8. LO signal selecting means 3 selects a required output signal from VCO circuit group 4. PLL 6 frequency-divides local signal fvco selected by LO signal selecting means 3, compares a phase thereof with a phase of a reference signal and outputs a signal converted from a phase difference. Loop filter 7 smoothes the output signal from PLL 6, outputs control voltage Vt that is a frequency control voltage and outputs the local-signal selected by signal selecting means 3 to high frequency signal processing means 1.

摘要翻译： 用于诸如电视广播接收机的无线电单元的VCO（压控振荡器）装置。 提供了在宽频带振荡频率下振荡并且能够实现低功耗的VCO器件。 VCO电路组4振荡对应于施加到频率控制电压端子8的控制电压Vt的频率的信号。 LO信号选择装置3从VCO电路组4中选择所需的输出信号。 PLL 6对由LO信号选择装置3选择的本地信号fvco进行分频，将其相位与参考信号的相位进行比较，并输出从相位差转换的信号。 环路滤波器7平滑来自PLL 6的输出信号，输出作为频率控制电压的控制电压Vt，并将由信号选择装置3选择的局部信号输出到高频信号处理装置1。

公开(公告)号：US20060128335A1

公开(公告)日：2006-06-15

申请号：US10526472

申请日：2004-06-24

申请人： Takeshi Fujii ,  Kenji Adachi ,  Hiroaki Ozeki ,  Mineyuki Iwaida

发明人： Takeshi Fujii ,  Kenji Adachi ,  Hiroaki Ozeki ,  Mineyuki Iwaida

IPC分类号： H04B1/40 ,  H04B1/06

CPC分类号： H03L7/099 ,  H03L7/10 ,  H03L2207/06

摘要： VCO (voltage-controlled oscillator) device used for a radio unit such as a television broadcast receiver. A VCO device oscillating in a wide band of oscillation frequency and capable of realizing low power consumption is provided. VCO circuit group 4 oscillates signals of frequencies corresponding to control voltage Vt applied to frequency control voltage terminal 8. LO signal selecting means 3 selects a required output signal from VCO circuit group 4. PLL 6 frequency-divides local signal fvco selected by LO signal selecting means 3, compares a phase thereof with a phase of a reference signal and outputs a signal converted from a phase difference. Loop filter 7 smoothes the output signal from PLL 6, outputs control voltage Vt that is a frequency control voltage and outputs the local-signal selected by signal selecting means 3 to high frequency signal processing means 1.

摘要翻译： 用于诸如电视广播接收机的无线电单元的VCO（压控振荡器）装置。 提供了在宽频带振荡频率下振荡并且能够实现低功耗的VCO器件。 VCO电路组4振荡对应于施加到频率控制电压端子8的控制电压Vt的频率的信号。 LO信号选择装置3从VCO电路组4中选择所需的输出信号。 PLL 6对由LO信号选择装置3选择的本地信号fvco进行分频，将其相位与参考信号的相位进行比较，并输出从相位差转换的信号。 环路滤波器7平滑来自PLL 6的输出信号，输出作为频率控制电压的控制电压Vt，并将由信号选择装置3选择的局部信号输出到高频信号处理装置1。

公开(公告)号：US20100311382A1

公开(公告)日：2010-12-09

申请号：US12867121

申请日：2009-04-16

申请人： Takashi Umeda ,  Hiroaki Ozeki ,  Yosuke Wada ,  Takeshi Fujii

发明人： Takashi Umeda ,  Hiroaki Ozeki ,  Yosuke Wada ,  Takeshi Fujii

IPC分类号： H04B15/00

CPC分类号： H03D7/165 ,  H04N5/455 ,  H04N5/46 ,  H04N21/42638 ,  H04N21/4382

摘要： Provided is a reception device that selectively receives an analog broadcast signal and a digital broadcast signal. The reception device includes: an oscillation unit operable to output an oscillator signal; a frequency conversion unit operable to output an IF (Intermediate Frequency) signal group based on the oscillator signal outputted from the oscillation unit and a reception signal; a filter unit connected to an output side of the frequency conversion unit; and a control unit operable to control a frequency of the oscillator signal outputted from the oscillation unit. The control unit controls: the frequency of the oscillator signal to be within a reception frequency band when receiving the digital broadcast signal; and the frequency of the oscillator signal to be outside the reception frequency band when receiving the analog broadcast signal. With this configuration, it is possible to improve reception quality when receiving an analog broadcast signal.

摘要翻译： 提供了选择性地接收模拟广播信号和数字广播信号的接收装置。 接收装置包括：振荡单元，用于输出振荡器信号; 频率转换单元，用于基于从振荡单元输出的振荡器信号和接收信号输出IF（中频）信号组; 连接到所述变频单元的输出侧的滤波器单元; 以及控制单元，用于控制从振荡单元输出的振荡器信号的频率。 控制单元控制：当接收到数字广播信号时，振荡器信号的频率在接收频带内; 并且当接收到模拟广播信号时，振荡器信号的频率在接收频带之外。 利用这种配置，可以在接收模拟广播信号时改善接收质量。

公开(公告)号：US07733986B2

公开(公告)日：2010-06-08

申请号：US11572942

申请日：2006-06-08

申请人： Takeshi Fujii ,  Hiroaki Ozeki

发明人： Takeshi Fujii ,  Hiroaki Ozeki

IPC分类号： H03D3/24

CPC分类号： H04B1/28 ,  H03J2200/02 ,  H03J2200/07 ,  H03L7/193 ,  H04L27/2657 ,  H04L2027/0028 ,  H04L2027/0055 ,  H04L2027/0065

摘要： A receiver has a receiving unit including a PLL, a mixer, and a filter, and demodulating unit including a frequency error detector for detecting a frequency error in a signal from a filter. The PLL includes a local oscillator for supplying a local oscillation signal to a mixer, a variable frequency divider for frequency-dividing the local oscillation signal based on a signal from the frequency error detector, and a phase comparator for comparing a signal from the variable frequency divider with a signal from a crystal oscillator. The PLL can reduce the frequency error of the local oscillation signal.

摘要翻译： 接收机具有包括PLL，混频器和滤波器的接收单元，以及包括用于检测来自滤波器的信号中的频率误差的频率误差检测器的解调单元。 PLL包括用于向混频器提供本地振荡信号的本地振荡器，用于基于来自频率误差检测器的信号对本地振荡信号进行分频的可变分频器，以及用于比较来自可变频率的信号的相位比较器 分频器与来自晶体振荡器的信号。 PLL可以降低本地振荡信号的频率误差。

公开(公告)号：US20090232259A1

公开(公告)日：2009-09-17

申请号：US11572942

申请日：2006-06-08

申请人： Takeshi Fujii ,  Hiroaki Ozeki

发明人： Takeshi Fujii ,  Hiroaki Ozeki

IPC分类号： H04L27/06

CPC分类号： H04B1/28 ,  H03J2200/02 ,  H03J2200/07 ,  H03L7/193 ,  H04L27/2657 ,  H04L2027/0028 ,  H04L2027/0055 ,  H04L2027/0065

摘要： A receiver has a receiving unit including a PLL, a mixer, and a filter, and demodulating unit including a frequency error detector for detecting a frequency error in a signal from a filter. The PLL includes a local oscillator for supplying a local oscillation signal to a mixer, a variable frequency divider for frequency-dividing the local oscillation signal based on a signal from the frequency error detector, and a phase comparator for comparing a signal from the variable frequency divider with a signal from a crystal oscillator. The PLL can reduce the frequency error of the local oscillation signal.

摘要翻译： 接收机具有包括PLL，混频器和滤波器的接收单元，以及包括用于检测来自滤波器的信号中的频率误差的频率误差检测器的解调单元。 PLL包括用于向混频器提供本地振荡信号的本地振荡器，用于基于来自频率误差检测器的信号对本地振荡信号进行分频的可变分频器，以及用于比较来自可变频率的信号的相位比较器 分频器与来自晶体振荡器的信号。 PLL可以降低本地振荡信号的频率误差。