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    • 1. 发明授权
    • Phase detectors for detecting a mutual phase difference between two
signals
    • 用于检测两个信号之间的相位差的相位检测器
    • US4488109A
    • 1984-12-11
    • US456503
    • 1983-01-07
    • Takashi OtobeYasutoshi KomatsuYoshikazu Murakami
    • Takashi OtobeYasutoshi KomatsuYoshikazu Murakami
    • H03D9/04H03D13/00G01R25/00
    • H03D13/007H03D13/00
    • A phase detector for detecting a mutual phase difference between two signals, such as first and second microwave signals, comprises first and second signal paths for being supplied with first and second input signals of the same frequency, respectively, and providing with a predetermined additional mutual phase difference between the first and second input signals at their output ends and a field effect transistor having a pair of input electrodes connected to the output ends of the first and second signal paths, respectively, and an output electrode from which an output signal representing a mutual phase difference which the first and second input signals have originally therebetween is derived. The first and second input signals at the input electrodes of the field effect transistor have the original mutual phase difference which is to be detected and the predetermined additional mutual phase difference added by the first and second signal paths therebetween. The field effect transistor is biased to operate with a gate bias voltage nearly equal to a pinch-off voltage thereof. In order to establish such biasing state without reducing the operational gain of the field effect transistor, a biasing resistance connected to the source of the field effect transistor is selected to be low and a current source is provided for supplying an external biasing current to the biasing resistance, thereby to produce the gate bias voltage required.
    • 用于检测诸如第一和第二微波信号的两个信号之间的相互相位差的相位检测器包括分别被提供有相同频率的第一和第二输入信号的第一和第二信号路径,并且提供预定的附加相互 在其输出端处的第一和第二输入信号之间的相位差和分别连接到第一和第二信号路径的输出端的一对输入电极的场效应晶体管和输出电极,输出信号表示 导出第一和第二输入信号之间的相互相位差。 场效应晶体管的输入电极处的第一和第二输入信号具有待检测的原始相位差和由它们之间的第一和第二信号路径相加的预定附加相位差。 场效应晶体管被偏置以以几乎等于其夹断电压的栅极偏置电压工作。 为了在不降低场效应晶体管的操作增益的情况下建立这种偏置状态,连接到场效应晶体管的源极的偏置电阻被选择为低,并且提供电流源以向偏置电压提供外部偏置电流 电阻,从而产生所需的栅极偏置电压。
    • 2. 发明授权
    • Dielectric resonator stabilized micro-strip oscillators
    • 介质谐振器稳定的微带振荡器
    • US4149127A
    • 1979-04-10
    • US871141
    • 1978-01-20
    • Yoshikazu MurakamiYasutoshi Komatsu
    • Yoshikazu MurakamiYasutoshi Komatsu
    • H03B5/04H03B5/18
    • H03B5/1876H03B2200/0024H03B2200/0028H03B5/04H03B5/1852
    • Dielectric resonator stabilized micro-strip oscillators in which micro-strip lines are provided to the first, second and third terminals of the active element for oscillation and in which a dielectric resonator coupled at a predetermined position to one of the micro-strip lines which is not used as an output terminal is disclosed. In the integrated microwave oscillator, there is an active element for oscillation such, for example, as GaAs-FET having first, second and third terminals. Micro-strip lines connect to the first and third terminals, and a micro-strip line connected between the first and third terminals form a feedback circuit, together with the first mentioned micro-strip lines. A dielectric resonator is coupled to one of these micro-strip lines which is not used as an output terminal at a predetermined location.
    • 介质谐振器稳定的微带振荡器,其中微带线被提供到用于振荡的有源元件的第一,第二和第三端子,并且其中介电谐振器在预定位置耦合到微带线之一, 未被用作输出端子被公开。 在集成微波振荡器中,存在用于振荡的有源元件,例如具有第一,第二和第三端子的GaAs-FET。 微带线连接到第一和第三端子,连接在第一和第三端子之间的微带线与前述的微带线一起形成反馈电路。 介质谐振器耦合到这些微带线之一,其不用作预定位置处的输出端子。
    • 8. 发明申请
    • Fuel cell system and method of controlling same
    • 燃料电池系统及其控制方法
    • US20050196655A1
    • 2005-09-08
    • US11076364
    • 2005-03-07
    • Kenichiro UedaYosuke FujiiYoshikazu MurakamiYuji Matsumoto
    • Kenichiro UedaYosuke FujiiYoshikazu MurakamiYuji Matsumoto
    • H01M8/10H01M8/04
    • H01M8/04231H01M8/04544
    • A fuel cell system has a fuel cell, a fuel supply device, a gas discharge valve, a voltage detecting device and a control device. The fuel supply device supplies a fuel gas to the fuel cell. The gas discharge valve discharges the fuel gas into an external environment. The voltage detecting device detects an output voltage of the fuel cell. The control device controls a discharging process when a request for starting the fuel cell is given. The discharging process includes introducing the fuel gas from the fuel supply device into a predetermined passage, opening the gas discharge valve and discharging residuals staying in the passage into the external environment. When the control device receives the request and determines that the output voltage has reached a first threshold before the discharging process has not been completed, the control device starts power generation irrespective of completion of the discharging process.
    • 燃料电池系统具有燃料电池,燃料供给装置,排气阀,电压检测装置和控制装置。 燃料供给装置向燃料电池供给燃料气体。 排气阀将燃料气体排放到外部环境中。 电压检测装置检测燃料电池的输出电压。 当给出启动燃料电池的请求时,控制装置控制放电过程。 排放过程包括将来自燃料供应装置的燃料气体引入预定的通道中,打开气体排出阀并排出留在通道中的残留物进入外部环境。 当控制装置接收到请求并且在放电处理尚未完成之前确定输出电压已经达到第一阈值时,控制装置开始发电而不管放电过程是否完成。
    • 9. 发明申请
    • Current limiting system and current limiting method for fuel cells
    • 燃料电池限流系统和限流方法
    • US20050142396A1
    • 2005-06-30
    • US11019503
    • 2004-12-21
    • Daishi IgarashiKenichiro KimuraYoshikazu MurakamiChirhiro WakeKenichiro Ueda
    • Daishi IgarashiKenichiro KimuraYoshikazu MurakamiChirhiro WakeKenichiro Ueda
    • H01M8/10H01M8/00H01M8/04
    • H01M8/04552H01M8/04589H01M8/0491
    • A current limiting system for fuel cells, which limits electric current generated by a fuel cell stack including a plurality of single cells generating electricity by a chemical reaction between fuel gas and oxidant. The current limiting system includes: a cell voltage detector which detects a cell voltage of each single cell; a current detector which detects a generated current taken out from the fuel cell stack; an input device through which are inputted the cell voltage and the generated current value; a target current limit value setting device which sets a target current limit value for limiting the generated current taken out from the fuel cell stack in accordance with the cell voltage; a current limit value setting device which sets a current limit value by replacing a present current limit value with the target current limit value when a difference between the present current limit value and the generated current value becomes smaller than a first predetermined value; and an output device which outputs the current limit value either to a current limiter for limiting the generated current in accordance with the current limit value or to an electric power consumption controller for controlling electric power consumption of loads that consume the generated current.
    • 一种用于燃料电池的电流限制系统,其限制由包括燃料气体和氧化剂之间的化学反应而发电的多个单电池的燃料电池堆产生的电流。 电流限制系统包括:电池电压检测器,其检测每个单电池的电池电压; 电流检测器,其检测从所述燃料电池堆取出的产生的电流; 输入设备,通过该输入设备输入单元电压和所生成的电流值; 目标电流限制值设定装置,其根据电池电压设定用于限制从燃料电池堆取出的发电电流的目标电流极限值; 电流限制值设定装置,其在当前电流限制值与所生成的电流值之间的差变得小于第一预定值时,通过将目前电流限制值替换为目标电流限制值来设定电流限制值; 以及输出装置,其将电流限制值输出到用于限制根据电流限制值的发电电流的限流器,或者输出到用于控制消耗所产生的电流的负载的电力消耗的电力消耗控制器。
    • 10. 发明授权
    • Failure determination method for an air supply system in a fuel cell apparatus
    • 燃料电池装置中的供气系统的故障判定方法
    • US06898964B2
    • 2005-05-31
    • US10723708
    • 2003-11-25
    • Kenichiro UedaJunji UeharaShinji YoshikawaYoshikazu Murakami
    • Kenichiro UedaJunji UeharaShinji YoshikawaYoshikazu Murakami
    • H01M8/04G01M17/00G01M99/00
    • H01M8/04395H01M8/04089H01M2250/20Y02T90/32
    • An oxidizing agent supply system failure determination method for a fuel cell for use with a fuel cell apparatus provided with a fuel cell that is supplied with a fuel and an oxidizing agent, and an oxidizing agent supply system that has an oxidizing agent condition adjusting means that adjusts condition of the oxidizing agent supplied to the fuel cell, comprising the step of determining that the oxidizing agent supply system has failed if an absolute value of a difference between an actual value of a supply provided by the oxidizing agent condition adjusting means and a first predetermined value that is compared to the actual value is equal to or greater than a second predetermined value and a predetermined period of time has passed. An oxidizing agent supply system failure determination method for a fuel cell is provided which can maintain the reliability of the fuel cell apparatus.
    • 一种与燃料电池装置一起使用的燃料电池的氧化剂供给系统故障判定方法,所述燃料电池装置设置有供给燃料和氧化剂的燃料电池,以及具有氧化剂状态调节装置的氧化剂供给系统, 调整供给到燃料电池的氧化剂的状态,包括如果氧化剂状态调节装置提供的供给的实际值与第一个氧化剂条件调节装置的实际值之间的差绝对值,则确定氧化剂供给系统失败的步骤 与实际值进行比较的预定值等于或大于第二预定值,并且经过预定时间段。 提供了能够维持燃料电池装置的可靠性的燃料电池的氧化剂供给系统故障判定方法。