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    • 5. 发明申请
    • MOTOR DRIVE DEVICE AND COOLING DEVICE USING THE SAME
    • 电机驱动装置和使用该装置的冷却装置
    • US20090096402A1
    • 2009-04-16
    • US12064389
    • 2006-08-23
    • Satoshi MiyajimaHiroaki HayashiTomofumi Mishima
    • Satoshi MiyajimaHiroaki HayashiTomofumi Mishima
    • G05D23/00
    • H02P6/16H02P6/26H03K2017/0806
    • A drive circuit of a fan motor is provided. In an embodiment of the drive circuit, a first PWM comparator compares a temperature detection voltage with a cyclic voltage, and outputs a first PWM signal. A second PWM comparator compares a minimum frequency setting voltage indicating a minimum frequency of the fan motor, with the cyclic voltage, and outputs a second PWM signal. The drive circuit combines the first PWM signal and the second PWM signal by a logical operation, to drive the fan motor. The drive circuit includes a first logic gate which generates a logical sum of the first PWM signal and the second PWM signal, and a second logic gate which generates a logical product of the first PWM signal and an inverted signal of the second PWM signal. The drive circuit switches drive mode based on the first logic gate and the second logic gate.
    • 提供了一种风扇马达的驱动电路。 在驱动电路的实施例中,第一PWM比较器将温度检测电压与循环电压进行比较,并输出第一PWM信号。 第二PWM比较器将表示风扇电动机的最小频率的最小频率设定电压与循环电压进行比较,并输出第二PWM信号。 驱动电路通过逻辑运算来组合第一PWM信号和第二PWM信号,以驱动风扇电动机。 驱动电路包括产生第一PWM信号和第二PWM信号的逻辑和的第一逻辑门和产生第一PWM信号与第二PWM信号的反相信号的逻辑积的第二逻辑门。 驱动电路基于第一逻辑门和第二逻辑门来切换驱动模式。
    • 8. 发明授权
    • Activation signal output circuit and determination circuit
    • 激活信号输出电路和确定电路
    • US07209842B2
    • 2007-04-24
    • US10536338
    • 2003-11-26
    • Kazuo MizunoRyu KimuraYoshiyuki KagoYukiomi TanakaKazuhiko EndoHisanori UdaHiroaki Hayashi
    • Kazuo MizunoRyu KimuraYoshiyuki KagoYukiomi TanakaKazuhiko EndoHisanori UdaHiroaki Hayashi
    • G06F19/00
    • H03D1/10H03D1/18
    • A start signal output circuit having an RF/DC conversion circuit to which radio frequency power (RF) of specified frequency is inputted and from which a direct current potential (DC) is outputted, comprises a detection/amplification circuit 210 which includes a voltage doubler wave-detector circuit 10 configured including a sensing diode Q1 (Tr34) for sensing the RF power, a differential amplifier including differential pair transistors Tr31 and Tr32, and a current mirror circuit. A base current of one Tr31 of the differential pair transistors is brought into substantial agreement with a DC component of a current flowing through the sensing diode Q1 (Tr34). A total of currents flowing through the differential pair transistors Tr31 and Tr32 is regulated to a substantially constant value by the current mirror circuit. Thus, the start signal output circuit which is small in size, high in sensitivity and low in power consumption can be realized.
    • 具有输入了特定频率的射频功率(RF)并从其输出直流电位(DC)的RF / DC转换电路的启动信号输出电路包括检测/放大电路210,其包括倍压器 波检测器电路10被配置为包括用于感测RF功率的感测二极管Q 1(Tr 34),包括差分对晶体管Tr 31和Tr 32的差分放大器和电流镜电路。 差分对晶体管的一个Tr 31的基极电流与流经感测二极管Q 1(Tr 34)的电流的直流分量基本一致。 流过差分对晶体管Tr 31和Tr 32的总电流通过电流镜电路被调节到基本恒定的值。 因此,可以实现尺寸小,灵敏度高,功耗低的启动信号输出电路。
    • 9. 发明申请
    • Start signal outputting circuit
    • 启动信号输出电路
    • US20060114035A1
    • 2006-06-01
    • US10523352
    • 2003-09-24
    • Kazuo MizunoRyu KimuraHisanori UdaHiroaki Hayashi
    • Kazuo MizunoRyu KimuraHisanori UdaHiroaki Hayashi
    • H03D3/00
    • H03D1/18H03G1/0023H03G3/30
    • A start signal outputting circuit according to the invention has a differential RF/DC convertor part 100 for converting a high frequency power (RF) into a d.c. potential (DC). The RF/DC convertor part 100 is formed by two transistors QRD,QDD working as a diode, and transistors QR1˜R3,QD1˜D3 and resistances RR1˜R3 for forming high resistances at anode sides andcathodesidesofthesediodes, respectively. Adifferential amplification part 200 disposed at a later stage of the diode has not only amplifying effect but also low-pass filtering effect together with filtering pars 120, 210 of its previous and later stages. In this case, it is designed so that current flowing through the respective circuits is about 2˜3 μA. As a result, even if the high frequency power of the specified frequency is weak, for example −60˜−40 dBm, a start signal outputting circuit 1000 which outputs a d.c. potential of 0.3˜2.4V, is suitable for integration and has a low power consumption can be obtained.
    • 根据本发明的启动信号输出电路具有差分RF / DC转换器部分100,用于将高频功率(RF)转换成直流 电位(DC)。 RF / DC转换器部分100由作为二极管工作的两个晶体管Q 1,D 2,D 2和D 2形成,晶体管Q 1至R 3, 用于在阳极侧形成高电阻的Q D1〜D3和电阻R 1〜R 3,并且分别与非二极管形成电阻。 设置在二极管的稍后级的差分放大部分200不仅具有放大效应,而且还具有低通滤波效果以及其先前和后期级的滤波器120,210。 在这种情况下,其设计使得流过各个电路的电流约为2〜3μA。 结果,即使指定频率的高频功率弱,例如-60〜-40dBm,也可以是输出直流电平的启动信号输出电路1000。 电位为0.3〜2.4V,适合集成,具有低功耗可以获得。