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1. 发明申请

US20120142297A1 RECEIVER 审中-公开
标题翻译：接收器
公开(公告)号：US20120142297A1
公开(公告)日：2012-06-07
申请号：US13371102
申请日：2012-02-10
申请人： Yasuo OBA , Eiji OKADA , Satoshi TSUKAMOTO
发明人： Yasuo OBA , Eiji OKADA , Satoshi TSUKAMOTO
IPC分类号： H04B1/06
CPC分类号： H03G3/3068 , H03G3/3078
摘要： A receiver includes an RF unit, a mixer which converts the output of the RF unit, a signal processing unit which filters the converted signal, a demodulator which demodulates the filtered signal, a level detector which compares a level of one of signals present between an input of the RF unit and an output of the signal processing unit with a threshold, a gain controller which generates a gain control signal based on the comparison result, a gate signal generator, and an interpolator. The receiver is configured such that a gain from the input of the RF unit to the output of the signal processing unit is changed in a stepwise manner. The gate signal generator generates a gate signal in synchronism with the gain change. The interpolator holds or interpolates the output of the demodulator for the time period represented by the gate signal.
摘要翻译：接收机包括RF单元，转换RF单元的输出的混频器，对转换的信号进行滤波的信号处理单元，对滤波后的信号进行解调的解调器;电平检测器，其比较存在于具有阈值的RF单元的输入和信号处理单元的输出，基于比较结果生成增益控制信号的增益控制器，门信号发生器和内插器。接收器被配置为使得从RF单元的输入到信号处理单元的输出的增益以逐步的方式改变。门信号发生器产生与增益变化同步的门信号。内插器在由门信号表示的时间段内保持或内插解调器的输出。

2. 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。

3. 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。

4. 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。

5. 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。

6. 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。

7. 发明申请

US20110188608A1 SEMICONDUCTOR INTEGRATED CIRCUIT AND BROADCAST RECEIVER 有权
标题翻译：半导体集成电路和广播接收器
公开(公告)号：US20110188608A1
公开(公告)日：2011-08-04
申请号：US13085794
申请日：2011-04-13
申请人： Yasuo OBA
发明人： Yasuo OBA
IPC分类号： H04L27/00
CPC分类号： H04B1/28 , H03D1/00 , H04N5/4446 , H04N5/455 , H04N21/42607 , H04N21/4382
摘要： A semiconductor integrated circuit for broadcast receivers, which integrates an RF circuit, a mixer, an IF circuit, and an intermediate-frequency signal processing circuit onto a single chip, additionally includes a second RF circuit whose input terminal is grounded through an impedance equivalent to or almost the same as the output impedance of an antenna circuit, and a second mixer downstream of the second RF circuit. The second RF circuit and the second mixer each has an input impedance equivalent to that of the received signal subsystem; therefore, a spurious component equivalent to the spurious component contained in the output signal of the received signal subsystem is detected in the second RF circuit and in the second mixer, and cancels out the spurious component contained in the output signal of the received signal subsystem. Accordingly, the effects of noise due to spurious can be effectively reduced.
摘要翻译：用于广播接收机的半导体集成电路，其将RF电路，混频器，IF电路和中频信号处理电路集成到单个芯片上，还包括第二RF电路，其输入端通过等于或几乎与天线电路的输出阻抗相同，以及在第二RF电路下游的第二混频器。第二RF电路和第二混频器各自具有与接收信号子系统相同的输入阻抗; 因此，在第二RF电路和第二混频器中检测到包含在接收信号子系统的输出信号中的杂散分量的杂散分量，并且消除包含在接收信号子系统的输出信号中的杂散分量。因此，可以有效地降低由杂散引起的噪声的影响。

8. 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。

9. 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

10. 发明授权

US07835718B2 Semiconductor circuit for wireless receiving provided with controller circuit for controlling bias current 有权
标题翻译：用于无线接收的半导体电路具有用于控制偏置电流的控制电路
公开(公告)号：US07835718B2
公开(公告)日：2010-11-16
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 , H04K3/00
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。

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