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    • 5. 发明授权
    • Receiver having DC offset decreasing function and communication system using the same
    • 具有DC偏移减小功能的接收机和使用该功能的通信系统
    • US06498929B1
    • 2002-12-24
    • US08880679
    • 1997-06-23
    • Hiroshi TsurumiHiroshi YoshidaTetsuro ItakuraTakafumi YamajiAkira YasudaTakashi UenoHiroshi TanimotoRyuichi FujimotoHiroshi Horiguchi
    • Hiroshi TsurumiHiroshi YoshidaTetsuro ItakuraTakafumi YamajiAkira YasudaTakashi UenoHiroshi TanimotoRyuichi FujimotoHiroshi Horiguchi
    • H04B716
    • H03D3/008H03G3/3052H04B1/30
    • A receiver having a function of a direct current offset, and including a receiving section for receiving a radio frequency signal, an analog signal processing section for amplifying, band-converting and frequency-converting an analog signal inputted from the receiving section, and an AD converting section for converting an output of the analog signal processing section from an analog signal to a digital signal. Also included is a digital signal processing section for processing the digital signal converted by the DC converting section. The receiver further includes an offset detecting element, provided in the digital signal processing section, for detecting a direct current offset signal produced in the receiving section or a frequency converting section, an offset holding element, provided in the digital signal processing section, for holding the direct current offset signal detected by the offset detecting element, a DA converting section for converting the direct current offset signal detected by the digital signal processing section into an analog signal, and a first offset correcting element, provided in the analog signal processing section, for correcting the analog signal on the basis of the direct current offset signal converted by the DA converting section into the analog signal.
    • 具有直流偏移功能的接收机,包括用于接收射频信号的接收部分,用于放大从接收部分输入的模拟信号的频带转换和频率转换的模拟信号处理部分,以及AD 转换部分,用于将模拟信号处理部分的输出从模拟信号转换成数字信号。 还包括用于处理由DC转换部分转换的数字信号的数字信号处理部分。 接收机还包括偏移检测元件,设置在数字信号处理部分中,用于检测在数字信号处理部分中设置的接收部分或频率转换部分产生的直流偏移信号,偏移保持元件,用于保持 由偏移检测元件检测的直流偏移信号,用于将由数字信号处理部分检测的直流偏移信号转换为模拟信号的DA转换部分和设置在模拟信号处理部分中的第一偏移校正元件, 用于基于由DA转换部分转换成的模拟信号的直流偏移信号来校正模拟信号。
    • 6. 发明授权
    • Radio apparatus
    • 无线电设备
    • US06339711B1
    • 2002-01-15
    • US09039464
    • 1998-03-16
    • Shoji OtakaHiroshi TsurumiHiroshi YoshidaSyuichi SekineHiroyuki KayanoTadahiko Maeda
    • Shoji OtakaHiroshi TsurumiHiroshi YoshidaSyuichi SekineHiroyuki KayanoTadahiko Maeda
    • H04B138
    • H03D3/008H03F1/30H03F3/189H03F2200/294H03F2200/372H03F2200/504H03G3/3042H03L7/107H04B1/18H04B1/28H04B1/30H04B1/403H04B1/405
    • In a radio apparatus, the band of a loop filter of a synthesizer in a blank channel searching state is narrower than the band in a communicating state. In addition, a radio wave environment is measured. A characteristic necessary for the radio apparatus is determined corresponding to the measured radio wave environment. The power is controlled corresponding to the performance of the radio apparatus. Thus, the power consumption is decreased. In addition, the efficiency of the output power is improved. In the radio apparatus, the current consumption of a power amplifier PA is measured. A matching circuit (LNA or MIX) of the antenna is adjusted with the measured result so as to decrease an antenna loss. In the radio apparatus, a DC offset is removed from the transmitted power and the reflected wave. When the DC offset is removed using an AC coupling capacitor, the deterioration of the frequency characteristic of the receiving portion is compensated with a capacitor in a digital signal process. In the radio apparatus, a transmission power detecting portion is structured as an IC chip. The transmission power detecting portion detects the transmission power corresponding to leakage currents in the power supply of the IC chip and the ground. Thus, when the power is detected, a power loss is suppressed. Consequently, the power consumption of the radio apparatus can be decreased.
    • 在无线电设备中,空白信道搜索状态的合成器的环路滤波器的频带比通信状态的频带窄。 另外,测量无线电波环境。 根据测得的无线电波环境确定无线电设备所必需的特性。 根据无线电设备的性能来控制功率。 因此,功耗降低。 此外,输出功率的效率提高。 在无线电设备中,测量功率放大器PA的电流消耗。 利用测量结果调整天线的匹配电路(LNA或MIX),以减少天线损耗。 在无线电设备中,从发射功率和反射波中去除DC偏移。 当使用AC耦合电容器去除DC偏移时,在数字信号处理中用电容器补偿接收部分的频率特性的劣化。 在无线电设备中,传输功率检测部分被构造为IC芯片。 发送功率检测部分检测与IC芯片和地面的电源中的泄漏电流相对应的发送功率。 因此,当检测到电力时,功率损失被抑制。 因此,可以减少无线电设备的功耗。
    • 7. 发明授权
    • Magnetic disk apparatus
    • 磁盘装置
    • US06094725A
    • 2000-07-25
    • US105396
    • 1998-06-26
    • Yutaka HiyoshiHiroyuki TanakaTakao HakamataniMasayuki KorikawaHiroshi TsurumiTetsuro KudoYuiti Ogawa
    • Yutaka HiyoshiHiroyuki TanakaTakao HakamataniMasayuki KorikawaHiroshi TsurumiTetsuro KudoYuiti Ogawa
    • G06F1/18G06F1/30G11B17/22G11B19/04G11B19/20G11B33/12G06F1/26G06F1/28
    • G11B33/125G06F1/184G06F1/187G06F1/188G06F1/30G11B17/22G11B19/04G11B19/20
    • A magnetic disk apparatus includes at least two systems, each system having at least one power unit and at least one battery unit ancillary to the power unit. The disk apparatus also includes at least one common power unit having a pluralities of batteries attached thereto connected in common with the two systems. Patrol control means (PC) is operatively connected to a power control unit (0) of one system and a power control unit (1) of another system for giving a control signal during a battery monitoring operation and a priority order to the battery monitoring operation. The patrol control means monitors the function of the common batteries attached to the common power unit and, further, when the common batteries are incorporated in the magnetic disk apparatus, controls the simultaneous monitoring of the common batteries and the time of incorporation of the common batteries into the magnetic disk apparatus. When one of the at least two systems is monitoring the common batteries, the power control unit of the one of the at least two system sends a master signal MAS to the patrol control means (PC) indicating that the one of the at least two systems is monitoring the common batteries, and the patrol control means sends an other-system patrol signal O-TST to the other of the at least two system indicating that the one of the two at least two system is monitoring the common batteries.
    • 磁盘装置包括至少两个系统,每个系统具有至少一个动力单元和至少一个辅助于动力单元的电池单元。 盘装置还包括至少一个共同的功率单元,其具有与两个系统共同连接的多个电池。 巡检控制装置(PC)可操作地连接到一个系统的功率控制单元(0)和另一个系统的功率控制单元(1),用于在电池监视操作期间给出控制信号,并且电池监视操作的优先顺序 。 巡检控制装置监视连接在公共电源装置上的普通电池的功能,此外,当公用电池组装在磁盘装置中时,控制共同电池的同时监视和公用电池的并入时间 进入磁盘装置。 当所述至少两个系统中的一个系统正在监控公用电池时,所述至少两个系统中的一个的功率控制单元向所述巡视控制装置(PC)发送主信号MAS,指示所述至少两个系统 正在监视公用电池,巡检控制装置将另一系统巡视信号O-TST发送到至少两个系统中的另一个系统,指示两个至少两个系统中的一个正在监视公用电池。
    • 8. 发明授权
    • Motor rotation speed control circuit
    • 电机转速控制电路
    • US5058191A
    • 1991-10-15
    • US354822
    • 1989-05-22
    • Hiroshi Tsurumi
    • Hiroshi Tsurumi
    • H02P29/00G01P3/489G11B19/28H02P23/00
    • G11B19/28G01P3/489H02P23/22Y10S388/912
    • A motor rotation speed control circuit fabricated in an LSI, a first counter which, after being reset by each rotation of the motor, begins counting clock pulses. Bit-outputs of the first counter are led out of the LSI package of the LSI, and are selectively connected to external input lead terminals of a plurality of gate circuits, each of which detects when the first counter has counted a number determined by sum of the input bit-outputs. One gate circuit detects a first reference count-number N.sub.a, which is smaller than a probable least count-number corresponding to, for example, a lower limit of tolerance of the motor speed, considering future possible changes of the motor speed. After being reset by a reset signal corresponding to the first refernece number N.sub.a input thereto, a second counter, preset with a second reference count-number N.sub.b, starts to count the clock pulses. The second reference count-number N.sub.b is chosen so that N.sub.a +N.sub.b =N.sub.0, N.sub.0 being a target count-number corresponding to a target cycle time of a single rotation. A carry signal of the second counter can be used in place of a lost signal representing the targe count-number N.sub.0 when the rotation of the motor is faster than the target speed. If the desired motor speed must by modified, the count-numbers can be easily modified by external connections of the terminals leading out of the LSI package. The second reference count-number of the second counters is fixed.
    • 9. 发明申请
    • STORAGE DEVICE, CONTROL METHOD AND CONTROLLER
    • 存储设备,控制方法和控制器
    • US20100191905A1
    • 2010-07-29
    • US12667849
    • 2007-07-06
    • Hiroshi Tsurumi
    • Hiroshi Tsurumi
    • G06F12/00G11B21/02G06F12/02
    • G11B5/09G11B20/10009G11B20/10027G11B20/10046G11B20/10481G11B2220/2516
    • A storage device comprises a recording/reproducing module which positions a head at an arbitrary position of a storage medium to record or reproduce data and a nonvolatile memory in which a parameter storage area is defined. An adjustment module adjusts various types of parameters necessary for controlling a positioning control module and the recording/reproducing module. A parameter save processing module saves adjusted parameters obtained by the adjustment module in the nonvolatile memory during adjustment, while leaving the minimum number of the adjusted parameters necessary to access a system area of the storage medium at the end of the parameter adjustment, and saves the remaining adjusted parameters in the system area of the storage medium to form a free area in the parameter storage area of the nonvolatile memory. The free area processing module uses the free area of the nonvolatile memory as a storage area for firmware, a log or the like other than the parameters.
    • 存储装置包括:记录/再现模块,其将头定位在存储介质的任意位置以记录或再现数据;以及非易失性存储器,其中定义参数存储区域。 调整模块调整用于控制定位控制模块和记录/再现模块所需的各种类型的参数。 参数保存处理模块在调整期间将调整模块获得的调整参数保存在非易失性存储器中,同时留下在参数调整结束时访问存储介质的系统区域所需的最小数量的调整参数,并保存 存储介质的系统区域中的剩余调整参数,以在非易失性存储器的参数存储区域中形成空闲区域。 空闲区域处理模块使用非易失性存储器的空闲区域作为参数之外的固件,日志等的存储区域。