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    • 1. 发明授权
    • PLL apparatus
    • PLL装置
    • US08115527B2
    • 2012-02-14
    • US12931779
    • 2011-02-10
    • Hiroki Kimura
    • Hiroki Kimura
    • H03L7/06
    • H03L7/14H03L1/02
    • There is provided an art to prevent an unstable operation due to temperature in a PLL apparatus in which a proper range of an amplitude level of an external reference frequency signal is specified and a control voltage is supplied to a voltage-controlled oscillator according to whether the amplitude level falls within the proper range or not. The PLL apparatus includes: a switching unit switching a signal that is to be supplied to a control voltage output unit between a signal of a phase comparison unit and a preset signal of a preset signal output unit; a protection circuit provided between a signal path of a reference frequency signal and a ground and having diodes that are connected in inverse parallel in order to regulate an amplitude level of the reference frequency signal; a temperature detection unit detecting an atmospheric temperature of the protection circuit; and a level detection unit detecting the amplitude level of the external reference frequency signal, and threshold values as references for the switching are set according to the detected temperature, thereby coping with a change in the amplitude level due to a temperature characteristic of the diodes.
    • 提供了一种防止在PLL装置中由于温度导致的不稳定操作的技术,其中指定了外部参考频率信号的幅度电平的适当范围,并且根据是否将控制电压提供给压控振荡器 振幅水平落在适当的范围内。 PLL装置包括:切换单元,将要提供给控制电压输出单元的信号切换到相位比较单元的信号和预设信号输出单元的预置信号之间; 保护电路,其设置在基准频率信号的信号路径与地之间,具有并联连接的二极管,以便调节参考频率信号的振幅电平; 温度检测单元,检测保护电路的大气温度; 检测外部参考频率信号的振幅电平的电平检测单元,根据检测到的温度设定作为开关用的参考值的阈值,从而应对由于二极管的温度特性导致的振幅电平的变化。
    • 3. 发明授权
    • Oscillating apparatus
    • 摆动装置
    • US07612590B2
    • 2009-11-03
    • US12257401
    • 2008-10-24
    • Hiroki KimuraYuichi Miyaji
    • Hiroki KimuraYuichi Miyaji
    • H03L7/06
    • H03L7/085H03L7/0898H03L7/18
    • An oscillating apparatus is provided that includes: an integration circuit that outputs a control signal based on an integration value of two inputted voltage values; an oscillator that outputs an oscillation signal of a frequency that is based on the control signal; a phase comparator that outputs a phase difference signal of a pulse width that is in accordance with a phase difference between the oscillation signal and the reference signal, by comparing the oscillation signal with a reference signal of a predetermined frequency; a controlling circuits that controls the two inputted voltage values based on the phase difference signal, so as to approximate a phase difference between the oscillation signal and the reference signal to a predetermined reference phase difference; and a voltage stabilizing current that defines the two inputted voltages based on a predetermined reference voltage.
    • 提供了一种振荡装置,包括:积分电路,其基于两个输入电压值的积分值输出控制信号; 输出基于所述控制信号的频率的振荡信号的振荡器; 相位比较器,通过将振荡信号与预定频率的参考信号进行比较来输出与振荡信号和基准信号之间的相位差相应的脉冲宽度的相位差信号; 控制电路,其基于所述相位差信号来控制所述两个输入的电压值,以将所述振荡信号和所述参考信号之间的相位差近似为预定的参考相位差; 以及基于预定参考电压限定两个输入电压的稳压电流。
    • 4. 发明申请
    • Information processing apparatus and method for controlling information processing apparatus
    • 信息处理装置及信息处理装置的控制方法
    • US20090132759A1
    • 2009-05-21
    • US12289368
    • 2008-10-27
    • Hiroki KimuraTetsuo Kaneko
    • Hiroki KimuraTetsuo Kaneko
    • G06F12/08
    • G06F12/0859
    • Disclosed herein is an information processing apparatus including: a dynamic random access memory; a memory controller that manages accesses to the dynamic random access memory on a bank basis; a cache memory that is connected to the memory controller via a bus and which caches data stored in the dynamic random access memory; and an information processing block that performs a read access to the dynamic random access memory via the cache memory. The cache memory includes: a refill request generation section configured to generate a refill request for caching the data stored in the dynamic random access memory in response to a cache miss for the read access; and a read access section configured to, when the refill requests have been accumulated for a predetermined number of banks, perform a read access to the dynamic random access memory while combining the refill requests for the predetermined number of banks.
    • 这里公开了一种信息处理设备,包括:动态随机存取存储器; 存储器控制器,其基于银行管理对所述动态随机存取存储器的访问; 高速缓冲存储器,其通过总线连接到存储器控制器,并且高速缓存存储在动态随机存取存储器中的数据; 以及信息处理块,其经由高速缓冲存储器执行对动态随机存取存储器的读取访问。 缓存存储器包括:补充请求生成部,被配置为响应于读取访问的高速缓存未命中生成用于高速缓存存储在动态随机存取存储器中的数据的补充请求; 以及读取访问部分,被配置为当对于预定数量的存储体累积了所述补充请求时,对所述预定数量的存储体组合所述重新填充请求,对所述动态随机存取存储器执行读取访问。
    • 5. 发明申请
    • OSCILLATING APPARATUS
    • 振动装置
    • US20090079480A1
    • 2009-03-26
    • US12257401
    • 2008-10-24
    • HIROKI KIMURAYUICHI MIYAJI
    • HIROKI KIMURAYUICHI MIYAJI
    • H03L7/06
    • H03L7/085H03L7/0898H03L7/18
    • An oscillating apparatus is provided that includes: an integration circuit that outputs a control signal based on an integration value of two inputted voltage values; an oscillator that outputs an oscillation signal of a frequency that is based on the control signal; a phase comparator that outputs a phase difference signal of a pulse width that is in accordance with a phase difference between the oscillation signal and the reference signal, by comparing the oscillation signal with a reference signal of a predetermined frequency; a controlling circuits that controls the two inputted voltage values based on the phase difference signal, so as to approximate a phase difference between the oscillation signal and the reference signal to a predetermined reference phase difference; and a voltage stabilizing current that defines the two inputted voltages based on a predetermined reference voltage.
    • 提供了一种振荡装置,包括:积分电路,其基于两个输入电压值的积分值输出控制信号; 输出基于所述控制信号的频率的振荡信号的振荡器; 相位比较器,通过将振荡信号与预定频率的参考信号进行比较来输出与振荡信号和基准信号之间的相位差相应的脉冲宽度的相位差信号; 控制电路,其基于所述相位差信号来控制所述两个输入的电压值,以将所述振荡信号和所述参考信号之间的相位差近似为预定的参考相位差; 以及基于预定参考电压限定两个输入电压的稳压电流。
    • 6. 发明申请
    • VCO driving circuit and frequency synthesizer
    • VCO驱动电路和频率合成器
    • US20090039973A1
    • 2009-02-12
    • US12219452
    • 2008-07-22
    • Yasuo KitayamaHiroki KimuraNaoki OnishiNobuo Tsukamoto
    • Yasuo KitayamaHiroki KimuraNaoki OnishiNobuo Tsukamoto
    • H03B5/08
    • H03L7/093H03L1/026H03L7/107H03L7/1075H03L7/18H03L7/189
    • A VCO driving circuit and a frequency synthesizer wherein the impedance viewed from a VCO control terminal is reduced to prevent the VCO phase noise characteristic from degrading. A VCO driving circuit and a frequency synthesizer having the VCO driving circuit, which comprises a coarse adjustment DAC that receives a digital data, which has a coarse adjustment frequency, to output an analog signal; a fine adjustment DAC that receives a digital data, which has a fine adjustment frequency, to output an analog signal; a low response speed LPF5 that removes noise from the output signal from the coarse adjustment DAC and then provides the resultant signal as an input to a VCO control terminal; a high response speed LPF7 that converts the output signal from the fine adjustment DAC to a voltage, thereby smoothing the signal; a resistor that connects an input stage of the LPF5 to that of the LPF7; and a capacitor used for providing a capacitive coupling such that the output of the LPF7 is added to that of the LPF5.
    • VCO驱动电路和频率合成器,其中从VCO控制端子观察的阻抗减小,以防止VCO相位噪声特性降级。 VCO驱动电路和具有VCO驱动电路的频率合成器,其包括具有粗略调整频率的接收数字数据的粗调DAC以输出模拟信号; 微调DAC,其接收具有微调频率的数字数据,以输出模拟信号; 低响应速度LPF5,其从粗调DAC输出信号中去除噪声,然后将所得到的信号作为输入提供给VCO控制端; 高响应速度LPF7,其将来自微调DAC的输出信号转换为电压,从而平滑信号; 将LPF5的输入级与LPF7的输入级连接的电阻; 以及用于提供电容耦合的电容器,使得LPF7的输出被添加到LPF5的输出。
    • 7. 发明申请
    • BUFFER CIRCUIT, AMPLIFIER CIRCUIT, AND TEST APPARATUS
    • 缓冲电路,放大器电路和测试装置
    • US20090027041A1
    • 2009-01-29
    • US11829939
    • 2007-07-29
    • HIROKI KIMURA
    • HIROKI KIMURA
    • G01R1/30H03K5/08H03G3/20
    • H03K19/01812G01R1/30G01R19/2506H03F3/4508H03F3/50H03F2203/45552H03F2203/5021H03G11/002
    • There is provided a buffer circuit that outputs a signal according to an input signal. The buffer circuit includes a first receiving transistor that receives the input signal through its base terminal, a first clamp transistor having polarity same as that of the first receiving transistor, of which an emitter terminal and a collector terminal are connected to corresponding terminals of the first receiving transistor and which receives a first clamp voltage restricting a signal level output from the buffer circuit through its base terminal, and a first current defining section that is commonly provided for the first receiving transistor and the first clamp transistor and defines a total amount of emitter currents flowing into the first receiving transistor and the first clamp transistor. The buffer circuit outputs an output signal according to an emitter voltage of the first receiving transistor.
    • 提供了根据输入信号输出信号的缓冲电路。 缓冲电路包括通过其基极接收输入信号的第一接收晶体管,具有与第一接收晶体管的极性相同的极性的第一钳位晶体管,其中发射极端子和集电极端子连接到第一接收晶体管的相应端子 并且其接收限制通过其基极端子从缓冲电路输出的信号电平的第一钳位电压,以及共同地为第一接收晶体管和第一钳位晶体管提供的第一电流限定部分,并且限定发射极的总量 流入第一接收晶体管和第一钳位晶体管的电流。 缓冲电路根据第一接收晶体管的发射极电压输出输出信号。
    • 8. 发明授权
    • Oscillation detecting apparatus and test apparatus
    • 振荡检测装置及试验装置
    • US07034562B2
    • 2006-04-25
    • US10848895
    • 2004-05-19
    • Hiroki Kimura
    • Hiroki Kimura
    • G01R31/26H03K5/22
    • G01R19/0007G01R19/1658
    • An oscillation detecting apparatus for detecting oscillation of a signal includes a high pass filter for generating an alternating current signal from which a direct current component of the signal is removed, a slicing circuit for generating a limit signal which results from restricting an amplitude level of the alternating current signal to a level lower than a predetermined level, an integration circuit for integrating a waveform of the limit signal during a predetermined period, and a comparator for detecting whether or not the signal oscillates based on a value of the waveform integrated by the integration circuit.
    • 用于检测信号的振荡的振荡检测装置包括:高通滤波器,用于产生消除信号的直流分量的交流信号;产生限制信号的限幅电路,限制信号由限制信号的幅度电平 将交流信号提供到低于预定电平的电平;积分电路,用于在预定时间段期间积分限制信号的波形;以及比较器,用于根据由积分积分的波形的值来检测信号是否振荡 电路。
    • 9. 发明授权
    • Calibration circuit for calibrating frequency characteristics of an
AC/DC converter
    • 用于校准AC / DC转换器频率特性的校准电路
    • US5933013A
    • 1999-08-03
    • US752320
    • 1996-11-19
    • Hiroki Kimura
    • Hiroki Kimura
    • G01R19/25G01R35/00G01R19/22
    • G01R19/2506G01R19/25G01R35/005
    • A calibration circuit of an AC/DC converter which measures an AC voltage by converting the AC voltage to a DC voltage. The AC/DC converter measures the AC voltage with high accuracy with low cost by having a calibration circuit to correct the frequency response characteristic involved in an AC/DC conversion process. The AC/DC converter includes a signal generator for generating at least two calibration signals having the same energy level and different frequency spectrums, a switch for selecting the input signal to be measured or one of the calibration signals from the signal generator, an amplifier for amplifying the selected signal from the switch wherein the amplifier has a circuit arrangement for adjusting a frequency characteristic thereof, and an AC/DC conversion circuit for converting an AC voltage from the amplifier to a corresponding DC voltage.
    • AC / DC转换器的校准电路,其通过将AC电压转换为DC电压来测量AC电压。 AC / DC转换器通过校准电路来校正AC / DC转换过程中涉及的频率响应特性,以低成本高精度测量交流电压。 AC / DC转换器包括用于产生具有相同能级和不同频谱的至少两个校准信号的信号发生器,用于选择待测量的输入信号的开关或来自信号发生器的校准信号之一, 从开关放大所选择的信号,其中放大器具有用于调整其频率特性的电路装置,以及用于将来自放大器的AC电压转换为相应的DC电压的AC / DC转换电路。
    • 10. 发明授权
    • Switch circuit, filter circuit and test apparatus
    • 开关电路,滤波电路及测试仪器
    • US08232808B2
    • 2012-07-31
    • US12207506
    • 2008-09-10
    • Hiroki KimuraChisato Maeda
    • Hiroki KimuraChisato Maeda
    • G01R31/02
    • G01R31/31924H03K17/56H03K17/693
    • There is provided a switch circuit for switching whether to output an input signal, including: a transmission path that transmits the input signal from an input end to an output end of the switch circuit; a first semiconductor switch that is provided on the transmission path and switches whether to transmit the input signal; a second semiconductor switch that is opened when the first semiconductor switch is short-circuited, and that is short-circuited when the first semiconductor switch is opened, thereby grounding, to a ground potential, a high-frequency signal leaked to the transmission path between the first semiconductor switch and the output end; and a voltage controller that causes a potential difference on both ends of the second semiconductor switch when the second semiconductor switch is opened.
    • 提供了一种用于切换是否输出输入信号的开关电路,包括:将输入信号从输入端传输到开关电路的输出端的传输路径; 第一半导体开关,其设置在所述传输路径上并切换是否传送所述输入信号; 第二半导体开关,其在第一半导体开关短路时断开,并且当第一半导体开关断开时短路,从而将泄漏到接地电位的高频信号接地,泄漏到第二半导体开关之间的传输路径上的高频信号 第一个半导体开关和输出端; 以及电压控制器,其在第二半导体开关断开时导致第二半导体开关的两端的电位差。