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1. 发明申请

US20120071127A1 AUTOMATIC GAIN CONTROL DEVICE, RECEIVER, ELECTRONIC DEVICE, AND AUTOMATIC GAIN CONTROL METHOD 审中-公开
标题翻译：自动增益控制装置，接收器，电子装置和自动增益控制方法
公开(公告)号：US20120071127A1
公开(公告)日：2012-03-22
申请号：US13305111
申请日：2011-11-28
申请人： Satoshi TSUKAMOTO , Eiji Okada , Yasuo Oba , Takaharu Saeki
发明人： Satoshi TSUKAMOTO , Eiji Okada , Yasuo Oba , Takaharu Saeki
IPC分类号： H04W52/52
CPC分类号： H03G3/3052
摘要： An automatic gain control device includes an amplifier which amplifies an input signal based on a gain control signal, and outputs an amplified signal, a converter which converts the amplified signal into a converted signal having a value corresponding to an absolute value of the amplified signal, a peak detector which removes, during a peak detection period, from values of the converted signal, a predetermined number of values which include a maximum value, and determines a peak level of the converted signal after the removing, an error calculator which calculates an error between the peak level and a reference signal, and outputs the error as an error signal, and a gain controller which updates the gain control signal based on the error signal, and outputs an updated gain control signal.
摘要翻译：一种自动增益控制装置，包括：放大器，其基于增益控制信号放大输入信号，并输出放大信号;转换器，其将放大信号转换成具有与放大信号的绝对值对应的值的转换信号; 峰值检测器，其在峰值检测周期期间从转换的信号的值，包括最大值的预定数量的值中去除，并且确定去除之后的转换信号的峰值电平，计算误差的误差计算器在峰值电平和参考信号之间，并将误差作为误差信号输出，以及增益控制器，其基于误差信号更新增益控制信号，并输出更新的增益控制信号。

2. 发明申请

US20120076246A1 AUTOMATIC GAIN CONTROL DEVICE AND ELECTRONIC DEVICE 审中-公开
标题翻译：自动增益控制装置和电子装置
公开(公告)号：US20120076246A1
公开(公告)日：2012-03-29
申请号：US13309077
申请日：2011-12-01
申请人： Eiji Okada , Satoshi Tsukamoto , Yasuo Oba , Takaharu Saeki
发明人： Eiji Okada , Satoshi Tsukamoto , Yasuo Oba , Takaharu Saeki
IPC分类号： H03G3/20 , H04N5/455 , H04L27/06
CPC分类号： H03G3/3068 , H04B1/18
摘要： An automatic gain control device includes amplifiers cascaded, each having a variable gain; level measurement portions respectively corresponding to the amplifiers, where each of the level measurement portions measures a level of an output signal of a corresponding one of the amplifiers in a level measurement period indicated by a level measurement signal; error calculators respectively corresponding to the level measurement portions, where each of the error calculators compares a level measured by a corresponding one of the level measurement portions with a threshold which is set so that a corresponding one of the amplifiers will not saturate, and outputs a comparison result as an error signal; a gain computation section which updates one of the gains of the amplifiers at a time corresponding to a gain update signal, based on the error signals; and an operation controller which generates the level measurement signal and the gain update signal.
摘要翻译：自动增益控制装置包括级联的放大器，每个具有可变增益; 分别对应于放大器的电平测量部分，其中每个电平测量部分在由电平测量信号指示的电平测量周期中测量相应的一个放大器的输出信号的电平; 分别对应于电平测量部分的误差计算器，其中每个误差计算器将由相应的电平测量部分测量的电平与设置为使得相应的一个放大器不会饱和的阈值进行比较，并输出比较结果作为误差信号; 增益计算部，其基于所述误差信号，在与增益更新信号对应的时刻更新所述放大器的增益中的一者; 以及产生电平测量信号和增益更新信号的操作控制器。

3. 发明授权

US07711395B2 Circuit current generation apparatus and method thereof, and signal processing apparatus 有权
标题翻译：电路电流产生装置及其方法以及信号处理装置
公开(公告)号：US07711395B2
公开(公告)日：2010-05-04
申请号：US11498584
申请日：2006-08-03
申请人： Yasuo Oba
发明人： Yasuo Oba
IPC分类号： H04B1/04
CPC分类号： H04B1/1607 , H03F1/0261 , H03F3/45098 , H03F2203/45674
摘要： A semiconductor integrated circuit for use in a receiver can reduce fluctuations in characteristics caused by fluctuations in current to thereby reduce dissipation power. A bias current detection circuit and a current control circuit are provided to decrease a current of a high-frequency circuit if a bias current is large and, if the bias current is small, increase the current of the high-frequency circuit, so as to prevent characteristics of the high-frequency circuit from deteriorating and to reduce the current, thereby enabling reducing dissipation power.
摘要翻译：用于接收机的半导体集成电路可以减少由电流波动引起的特性波动，从而降低耗散功率。提供偏置电流检测电路和电流控制电路，以在偏置电流较大时降低高频电路的电流，并且如果偏置电流较小，则增加高频电路的电流，从而防止高频电路的特性劣化，降低电流，能够降低耗散功率。

4. 发明申请

US20060066759A1 Automatic frequency tuning system 审中-公开
标题翻译：自动频率调谐系统
公开(公告)号：US20060066759A1
公开(公告)日：2006-03-30
申请号：US11230894
申请日：2005-09-21
申请人： Makoto Ikuma , Yasuo Oba
发明人： Makoto Ikuma , Yasuo Oba
IPC分类号： H04N5/50 , H04B1/18
CPC分类号： H04N5/4446 , H04N5/455 , H04N5/50
摘要： An automatic frequency tuning system according to the present invention includes an antenna, a tuner circuit, a video SAW filter, a video intermediate frequency amplifier, a video detector, a video amplifier, a video PLL circuit, an AFT control circuit, a microcomputer and a memory. In addition to the above members, the automatic frequency tuning system further includes a reference PLL circuit for reducing variation in a free running frequency of a video voltage controlled oscillator, a comparator for determining a magnitude relationship between a received video frequency and a standard video frequency, a mixer for mixing an output signal of the video control frequency and an output signal of a reference voltage controlled oscillator and retrieving sum and difference signals for frequencies of the outputs, and a mixer low pass filter for supplying only a frequency difference signal to a subsequent stage.
摘要翻译：根据本发明的自动频率调谐系统包括天线，调谐器电路，视频SAW滤波器，视频中频放大器，视频检测器，视频放大器，视频PLL电路，AFT控制电路，微计算机和一个记忆除了上述部件之外，自动频率调谐系统还包括用于减小视频压控振荡器的自由运行频率变化的参考PLL电路，用于确定接收视频和标准视频之间的幅度关系的比较器混频器，用于混合视频控制频率的输出信号和参考压控振荡器的输出信号，并且检索输出频率的和和差分信号;以及混频器低通滤波器，用于仅将频差信号提供给后续阶段

5. 发明授权

US07492216B2 Filtering apparatus for correcting variation of CR-product 失效
标题翻译：用于校正CR产品变化的过滤装置
公开(公告)号：US07492216B2
公开(公告)日：2009-02-17
申请号：US11783059
申请日：2007-04-05
申请人： Hidehiko Kurimoto , Yasuo Oba
发明人： Hidehiko Kurimoto , Yasuo Oba
IPC分类号： H03K5/00
CPC分类号： H03H11/1291 , H03H2210/021 , H03H2210/043
摘要： A filtering apparatus includes a main filter, a variation detection circuit, and a variation correction circuit. The variation detection circuit includes a reference filter having at least one resistor and at least one capacitor, detects a variation of CR-product based on the resistor and the capacitor of the reference filter in response to each of a plurality of reference signals having different frequencies from each other, and then outputs a variation detection signal indicating a detected result. The variation correction circuit corrects frequency characteristics of the main filter on the basis of the variation detection signal.
摘要翻译：滤波装置包括主滤波器，变化检测电路和变化校正电路。变化检测电路包括具有至少一个电阻器和至少一个电容器的参考滤波器，响应于具有不同频率的多个参考信号中的每一个，基于电阻器和参考滤波器的电容器检测CR乘积的变化然后输出指示检测结果的变化检测信号。变化校正电路根据变化检测信号校正主滤波器的频率特性。

6. 发明申请

US20050249316A1 Digital signal receiver 审中-公开
标题翻译：数字信号接收机
公开(公告)号：US20050249316A1
公开(公告)日：2005-11-10
申请号：US10524203
申请日：2004-06-14
申请人： Hiroaki Ozeki , Yuichi Watanabe , Ippei Kanno , Yasuo Oba , Takeo Yasuho
发明人： Hiroaki Ozeki , Yuichi Watanabe , Ippei Kanno , Yasuo Oba , Takeo Yasuho
IPC分类号： H04B1/26 , H04J11/00 , H04L27/26 , H04L27/22
CPC分类号： H04L27/2647 , H03J1/0041 , H04N5/4401 , H04N21/41407 , H04N21/4305 , H04N21/4382 , H04N21/4436
摘要： A digital signal receiver includes a reference signal generator for generating a first reference signal, a base band transform circuit for converting a first high-frequency signal with digital modulation into a base band signal with using the first reference signal, a frequency divider to divide the first reference signal, a frequency multiplier to multiply a frequency of a signal output from the frequency divider, and a digital demodulator to demodulate a signal output from the base band transform circuit with using the signal output from the frequency multiplier as a reference signal. The digital signal receiver consumes a small power since a small current flows in the frequency multiplier.
摘要翻译：数字信号接收机包括用于产生第一参考信号的参考信号发生器，用于使用第一参考信号将具有数字调制的第一高频信号转换成基带信号的基带变换电路，分频器第一参考信号，乘法器，用于乘以从分频器输出的信号的频率和数字解调器，以使用从倍频器输出的信号作为参考信号来解调从基带变换电路输出的信号。数字信号接收器消耗小功率，因为小的电流在倍频器中流动。

7. 发明授权

US07504885B2 Variable gain amplifier 有权
标题翻译：可变增益放大器
公开(公告)号：US07504885B2
公开(公告)日：2009-03-17
申请号：US11733645
申请日：2007-04-10
申请人： Yasuo Oba , Takatoshi Kawai
发明人： Yasuo Oba , Takatoshi Kawai
IPC分类号： H03G3/10
CPC分类号： H03G1/0088 , H03G1/007
摘要： A variable gain amplifier of the present invention connects an input and an output of a first variable gain amplifier circuit to an RF input terminal and an RF output terminal, respectively, connects one terminal of an attenuation circuit is to an RF input terminal, connects an input and an output of a second variable gain amplifier circuit to the other terminal of the attenuation circuit and an RF output terminal, respectively, connects one terminal of the variable resistance circuit to a node between the attenuation circuit and the second variable gain amplifier circuit, and grounds the other terminal of the variable resistance circuit. A gain of the first variable gain amplifier circuit, a gain of the second variable gain amplifier circuit, and a resistance value of the variable resistance circuit are then varied by a gain control voltage outputted from a gain control section.
摘要翻译：本发明的可变增益放大器将第一可变增益放大器电路的输入和输出分别连接到RF输入端子和RF输出端子，将衰减电路的一个端子连接到RF输入端子，将输入和第二可变增益放大器电路的输出分别连接到衰减电路的另一端和RF输出端，将可变电阻电路的一个端子连接到衰减电路和第二可变增益放大器电路之间的节点，并将可变电阻电路的另一端接地。然后，通过从增益控制部输出的增益控制电压来改变第一可变增益放大器电路的增益，第二可变增益放大器电路的增益和可变电阻电路的电阻值。

8. 发明申请

US20080139163A1 SEMICONDUCTOR CIRCUIT FOR WIRELESS RECEIVING PROVIDED WITH CONTROLLER CIRCUIT FOR CONTROLLING BIAS CURRENT 有权
标题翻译：用于控制电路的无线接收的半导体电路用于控制偏置电流
公开(公告)号：US20080139163A1
公开(公告)日：2008-06-12
申请号：US11951071
申请日：2007-12-05
申请人： Yasuo Oba , Hidehiko Kurimoto
发明人： Yasuo Oba , Hidehiko Kurimoto
IPC分类号： H04B1/16
CPC分类号： H04B1/28 , H04B1/18
摘要： A constant voltage source supplies a bias current to a wireless receiver circuit. A bias current detector circuit detects the bias current, and outputs a detection result to a current controller circuit. The current controller circuit outputs the detection result of the bias current to a memory circuit. The current controller circuit controls the bias current detector circuit to stop operating thereof, and then controls the bias current to decrease when the detected bias current is larger than a predetermined first threshold value and controls the bias current to increase when the detected bias current is smaller than a second threshold value smaller than the first threshold value, based on the detection result stored in the memory circuit.
摘要翻译：恒定电压源向无线接收器电路提供偏置电流。偏置电流检测器电路检测偏置电流，并将检测结果输出到电流控制器电路。电流控制器电路将偏置电流的检测结果输出到存储电路。电流控制器电路控制偏置电流检测器电路以停止其工作，然后当检测到的偏置电流大于预定的第一阈值时控制偏置电流减小，并且当检测到的偏置电流较小时控制偏置电流增加比基于存储在存储器电路中的检测结果小于第一阈值的第二阈值。

9. 发明申请

US20070032215A1 Circuit current generation apparatus and method thereof, and singal processing apparatus 有权
标题翻译：电路电流产生装置及其方法和单声道处理装置
公开(公告)号：US20070032215A1
公开(公告)日：2007-02-08
申请号：US11498584
申请日：2006-08-03
申请人： Yasuo Oba
发明人： Yasuo Oba
IPC分类号： H04B1/26
CPC分类号： H04B1/1607 , H03F1/0261 , H03F3/45098 , H03F2203/45674
摘要： A semiconductor integrated circuit for use in a receiver can reduce fluctuations in characteristics caused by fluctuations in current to thereby reduce dissipation power. A bias current detection circuit and a current control circuit are provided to decrease a current of a high-frequency circuit if a bias current is large and, if the bias current is small, increase the current of the high-frequency circuit, so as to prevent characteristics of the high-frequency circuit from deteriorating and to reduce the current, thereby enabling reducing dissipation power.
摘要翻译：用于接收机的半导体集成电路可以减少由电流波动引起的特性波动，从而降低耗散功率。提供偏置电流检测电路和电流控制电路，以在偏置电流较大时降低高频电路的电流，并且如果偏置电流较小，则增加高频电路的电流，从而防止高频电路的特性劣化，降低电流，能够降低耗散功率。

10. 发明授权

US07098967B2 Receiving apparatus 失效
标题翻译：接收装置
公开(公告)号：US07098967B2
公开(公告)日：2006-08-29
申请号：US10247749
申请日：2002-09-20
申请人： Ippei Kanno , Hiroaki Ozeki , Yasuo Oba , Akira Fujishima , Mineyuki Iwaida
发明人： Ippei Kanno , Hiroaki Ozeki , Yasuo Oba , Akira Fujishima , Mineyuki Iwaida
IPC分类号： H04N5/455
CPC分类号： H04B1/1027 , H03D7/165 , H03J1/005 , H04N5/4401 , H04N5/455
摘要： Frequency conversion into a first intermediate frequency which is higher than a received frequency band is performed for a received signal by using a mixer and a PLL. Next, an output of the mixer is frequency converted into a second intermediate frequency of a base band by using a quadrature mixer formed by mixers and a phase shifter. At this time, a frequency of the local oscillation signal of a PLL supplied to the quadrature mixer is controlled so as to be switched, depending on a position of the received segment, between a frequency which is higher than the first intermediate frequency and a frequency which is lower than the same.
摘要翻译：通过使用混频器和PLL对接收信号执行高于接收频带的第一中频的频率转换。接下来，通过使用由混频器和移相器形成的正交混频器将混频器的输出频率转换为基带的第二中频。此时，提供给正交混频器的PLL的本地振荡信号的频率被控制，以便根据接收段的位置在高于第一中频的频率和频率之间切换低于相同。

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