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11. 发明专利

JP2004080985A Power supply device and hard disk device using it, integrated circuit 有权
公开(公告)号：JP2004080985A
公开(公告)日：2004-03-11
申请号：JP2003170175
申请日：2003-06-16
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SASE TAKASHI , TATENO KOJI , KANOUDA TAMAHIKO , HAYASHI KATSUNORI , YOSHIDA SHINICHI
IPC分类号： G11B33/00 , H02M3/155 , H02M3/28
摘要： PROBLEM TO BE SOLVED: To provide a power supply device that makes the stabilization compatible with responsiveness of a control loop to go hand in hand.
SOLUTION: The power supply device connects a filter provided aside from an LC smoothing filter for power system and a differential amplifier in the interior of an error amplifier and feeds power back to an error amplifier for output voltage signal. The device also applies the output of the LC smoothing filter for power system to a control circuit having upper and lower limit detection, and controls forcefully a duty to 0% or 100% when a transient load varies, aside from a duty control of power MOSF-ET serving as top/bottom semiconductor switching device of a stationary state.
COPYRIGHT: (C)2004,JPO

12. 发明专利

JP2013158122A Power conversion device, method of controlling power conversion device, and hard disk device 有权
标题翻译：电力转换装置，控制电力转换装置的方法和硬盘装置
公开(公告)号：JP2013158122A
公开(公告)日：2013-08-15
申请号：JP2012016153
申请日：2012-01-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SASE TAKASHI , KANOUDA TAMAHIKO , TSUYUKI YOSUKE , SHOJI HIROYUKI
IPC分类号： H02M7/12 , G11B33/12 , H02M3/28
CPC分类号： H02M1/4258 , H02M2001/0064 , Y02B70/126
摘要： PROBLEM TO BE SOLVED: To provide a low cost and high efficiency power conversion device.SOLUTION: In the power conversion device which has a first inductor, a rectification arm, a first switch arm comprising first and second switch circuits, a second switch arm comprising a third switch circuit and a first capacitor, an LC serial circuit, a transformer, a rectifying/smoothing circuit connected to a secondary winding of the transformer, and a control circuit for controlling on/off the first, second and third switch circuits, and in which the rectification arm, the first switch arm, the second switch arm and the LC serial circuit are connected in parallel with one another, the LC serial circuit is connected to a primary winding of the transformer, and the rectification arm is connected with an AC power supply via the first inductor, the control circuit includes an output voltage control circuit for controlling an output voltage at a predetermined set value, an intermediate voltage control circuit for controlling an intermediate voltage at a predetermined set value, and a power factor improvement control circuit.
摘要翻译：要解决的问题：提供一种低成本和高效率的电力转换装置。解决方案：在具有第一电感器，整流臂，包括第一和第二开关电路的第一开关臂的电力转换装置中，第二开关臂包括第三开关电路和第一电容器，LC串联电路，变压器，连接到变压器的次级绕组的整流/平滑电路以及用于控制第一，第二和第三开关电路的接通/断开的控制电路，以及其中整流臂，第一开关臂，第二开关臂和LC串联电路彼此并联连接，LC串联电路连接到变压器的初级绕组，整流臂与通过第一电感器的交流电源，控制电路包括用于控制预定设定值的输出电压的输出电压控制电路，中间电压控制 l电路，用于控制预定设定值的中间电压，以及功率因数改善控制电路。

13. 发明专利

JP2009027773A Power unit, ic circuit, information processor, and soft start control method 审中-公开
标题翻译：电源单元，IC电路，信息处理器和软启动控制方法
公开(公告)号：JP2009027773A
公开(公告)日：2009-02-05
申请号：JP2007185863
申请日：2007-07-17
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SASE TAKASHI , KAWAKUBO YOSUKE , KURITA KOZABURO
IPC分类号： H02M3/155
CPC分类号： H02M1/36 , H02M3/156 , H02M2001/0009
摘要： PROBLEM TO BE SOLVED: To provide a soft start method and a soft start circuit for a power unit which is suitable for an on-chip power source that does not need an external capacitor at soft start.
SOLUTION: The power unit detects a current, which flows to an upper power MOSFET at soft start, with the ON voltage of the MOSFET, and forcibly resets, the ON pulse width of PWM pulses, which drives an upper power MOSFET, by a signal which is generated when this voltage drops under a specified voltage.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供适用于在软启动时不需要外部电容器的片上电源的功率单元的软启动方法和软启动电路。
解决方案：功率单元通过MOSFET的导通电压检测到软启动时流向上功率MOSFET的电流，并强制复位驱动上功率MOSFET的PWM脉冲的导通脉冲宽度，通过当该电压在指定电压下降时产生的信号。版权所有（C）2009，JPO＆INPIT

14. 发明专利

JP2008113542A Digital control switching power supply and information processing apparatus 有权
标题翻译：数字控制切换电源和信息处理设备
公开(公告)号：JP2008113542A
公开(公告)日：2008-05-15
申请号：JP2007201087
申请日：2007-08-01
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SASE TAKASHI , KAWAKUBO YOSUKE
IPC分类号： H02M3/155
CPC分类号： H02M3/157
摘要： PROBLEM TO BE SOLVED: To provide a digital control switching power supply which is suitable for high-speed response to sharp load changes. SOLUTION: In addition to the output of a PWM pulse signal of desired duty by normal digital signal processing, a transient change detection means, comprising a CR filter installed across an output inductor and window comparators, is provided in parallel; and when a sharp load change is detected, the PWM pulse signal of 0% duty or 100% duty is forcedly outputted, at sharp load decrease or sharp load increase, respectively. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种适用于高速响应急剧负载变化的数字控制开关电源。
解决方案：除了通过正常数字信号处理输出所需占空比的PWM脉冲信号之外，并联提供包括安装在输出电感器和窗口比较器两端的CR滤波器的瞬态变化检测装置，并且当检测到急剧的负载变化时，强制输出0％占空比或100％占空比的PWM脉冲信号，分别在急剧负载下降或急剧增加负载时。版权所有（C）2008，JPO＆INPIT

15. 发明专利

JP2007159176A Power unit 有权
标题翻译：动力单元
公开(公告)号：JP2007159176A
公开(公告)日：2007-06-21
申请号：JP2005346629
申请日：2005-11-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SASE TAKASHI , KANOUDA TAMAHIKO , KAWAKUBO YOSUKE
IPC分类号： H02M3/155 , G01R31/28 , G01R31/30
CPC分类号： H02M3/156 , H02M2001/0025
摘要： PROBLEM TO BE SOLVED: To provide a power unit which is equipped with a margin check voltage setting circuit that is easily miniaturized and integrated.
SOLUTION: This power unit has a margin check voltage setting circuit which sets desired margin check voltage by inputting reference voltage, an error amplifier which receives the input of the margin check voltage and the output voltage of itself and outputs the difference between both as an error signal, a pulse width modulating oscillator which modulates the pulse width of the output of the above error amplifier, a driving circuit which generates a drive signal by the pulse signal from the pulse width modulating oscillator, and a pair of power semiconductor switching elements which step down the input voltage, based on the drive signal from the driving circuit, and generate output voltage. The output end of the margin check voltage setting circuit is provided with an overvoltage detecting circuit which sets comparative voltage for overvoltage detection and a power good circuit which sets comparative voltage for determining power good.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种配备有容易小型化和集成的边缘检查电压设置电路的电源单元。
解决方案：该电源单元具有通过输入参考电压设置所需余量检查电压的余量检查电压设置电路，接收余量检查电压输入和自身输出电压的误差放大器，并输出两者之间的差值作为误差信号，调制上述误差放大器的输出的脉冲宽度的脉宽调制振荡器，通过来自脉宽调制振荡器的脉冲信号产生驱动信号的驱动电路和一对功率半导体开关基于来自驱动电路的驱动信号降低输入电压的元件，并产生输出电压。边缘检查电压设定电路的输出端设有过电压检测电路，设置过电压检测的比较电压和设定比较电压以确定电源良好的电源良好电路。版权所有（C）2007，JPO＆INPIT

16. 发明专利

JPH09121143A TEMPERATURE COMPENSATED VARIABLE FREQUENCY OSCILLATOR 失效
公开(公告)号：JPH09121143A
公开(公告)日：1997-05-06
申请号：JP27861895
申请日：1995-10-26
申请人： HITACHI LTD
发明人： SASE TAKASHI , KATO KAZUO , TOMITA KIKUO
IPC分类号： H03K3/282
摘要： PROBLEM TO BE SOLVED: To sufficiently components the influence of temp. in the temp. coefficient of an oscillation frequency by setting the current density of a reference diode to be lower than the that of a clamp diode and generating the temp. coefficient of the reference diode more largely. SOLUTION: When slight current is permitted to flow between a control input terminal 1 and a ground with starting resistance, the current is supplied to the composite circuit of the input TRs Q7 and Q8 of an oscillator 10 with the transistors TRs Q14 and Q15 off a current mirror stage and the operation current of the oscillator is supplied to TRs Q5 and Q6 constituting a constant current circuit. The current is permitted to flow through reference diodes Q91-Q9n so as to generate a forward lowering voltage VD. A differential voltage AMP amplifies the difference voltage between the forward lowering voltage VD and the terminal voltage of resistance R3, thereby current is permitted to flow through resistance R3 is increased through TR Q12 and Q13 so that the difference voltage becomes zero. Thus, the current density of the reference diode is set to be lower than that of the clamp diode so that the temp. coefficient of the reference diode is generated more largely.

17. 发明专利

JPH07322655A DRIVING DEVICE FOR ULTRASONIC MOTOR 失效
公开(公告)号：JPH07322655A
公开(公告)日：1995-12-08
申请号：JP11244394
申请日：1994-05-26
申请人： HITACHI LTD
发明人： KATO KAZUO , SASE TAKASHI , DOKEN TOMOHIKO , OSHIMA SHUZO , TAKIZAWA KAZUYOSHI
IPC分类号： H02N2/00
摘要： PURPOSE:To provide a driving device for an ultrasonic motor, in which circuit constitution is simplified by high-speed operation and high-resolution operation, cost thereof is reduced and which has high efficiency. CONSTITUTION:The frequency of voltage applied to an ultrasonic motor 10 through a D/A converter 20, a VCO 30 and a driver 40 is changed stepwise by a micro-processor 100, the magnitude of corresponding motor currents is discriminated, and the ultrasonic motor 10 is driven while using frequency as maximum currents as resonance frequency.

18. 发明专利

JPH053932B2 失效
公开(公告)号：JPH053932B2
公开(公告)日：1993-01-18
申请号：JP13183886
申请日：1986-06-09
申请人： HITACHI LTD
发明人： SASE TAKASHI , KATO KAZUO , SATO HIDEO
IPC分类号： H03K3/282

19. 发明专利

JPH0445007B2 失效
公开(公告)号：JPH0445007B2
公开(公告)日：1992-07-23
申请号：JP6570086
申请日：1986-03-26
申请人： HITACHI LTD
发明人： KATO KAZUO , SASE TAKASHI , SATO HIDEO , ONDA KENICHI , IKUSHIMA ICHIRO
IPC分类号： H03K3/282

20. 发明专利

JPH0394505A COMPLEMENTARY TRANSISTOR CIRCUIT AND AMPLIFIER USING THE CIRCUIT AND CRT DISPLAY DEVICE 失效
公开(公告)号：JPH0394505A
公开(公告)日：1991-04-19
申请号：JP3377290
申请日：1990-02-16
申请人： HITACHI LTD
发明人： KATO KAZUO , SATO HIDEO , SASE TAKASHI , YAMASHITA KENKICHI
IPC分类号： H04N5/14 , G09G1/00 , G09G1/16 , G09G1/28 , H03F1/34 , H03F3/189 , H03G3/10 , H03K17/62
摘要： PURPOSE:To realize a video amplifier and a display device with broad band and low power consumption by adopting a complementary bipolar transistor(TR) circuit for a main high frequency circuit, integrating the circuit and adopting the current operating type as best as possible. CONSTITUTION:A video amplifier circuit comprises a drive stage 80 of a low voltage consisting of an LSI of a complementary bipolar TR and comprises an output stage 70 for high voltage amplification and the drive stage 80 and the high voltage output stage 70 are connected to constitute a cascode amplifier. The drive stage LSI 80 is made up the LSI of the complementary bipolar TR, to which an input stage of two input buffer multiplexer 10, a voltage/current(V/ I) conversion circuit 20 having a conversion impedance Zx connecting to the output side of the multiplexer and a gain controller 31 using a multiplication function are connected.

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