Switching output circuit with high speed operation and low power
consumption
    52.
    发明授权
    Switching output circuit with high speed operation and low power consumption 失效
    开关输出电路具有高速运行和低功耗

    公开(公告)号:US4985648A

    公开(公告)日:1991-01-15

    申请号:US386356

    申请日:1989-07-18

    IPC分类号: H03K19/00

    CPC分类号: H03K19/001

    摘要: Respective current supply means (I.sub.A, I.sub.B) control conducting periods of corresponding transistors (Q.sub.3, Q.sub.4), whereby conducting periods of driving transistore (Q.sub.6, Q.sub.7) are also controlled. Thus, periods in which both of the driving transistors (Q.sub.6, Q.sub.7) simultaneously enter ON states are reduced and through current (I.sub.S) flowing to the ground level GND through the driving transistors (Q.sub.6, Q.sub.7) is reduced. A pull-down transistor (Q.sub.8) controls a conducting period of the driving transistor (Q.sub.7), whereby periods in which both of the driving transistors (Q.sub.6, Q.sub.7) simultaneously enter ON states are reduced and the through current (I.sub.S) is reduced.

    摘要翻译: 相应的电流供应装置(IA,IB)控制对应晶体管(Q3,Q4)的导通周期,从而也控制驱动转换周期(Q6,Q7)。 因此,同时进入导通状态的驱动晶体管(Q6,Q7)同时进入的周期减少,并且通过驱动晶体管(Q6,Q7)流到地电平GND的通过电流(IS)减小。 下拉晶体管(Q8)控制驱动晶体管(Q7)的导通周期,由此同时进入导通状态的两个驱动晶体管(Q6,Q7)的周期减少,并且通过电流(IS)减小。

    Servo circuit for a signal reproducing apparatus
    53.
    发明授权
    Servo circuit for a signal reproducing apparatus 失效
    用于信号再现装置的伺服电路

    公开(公告)号:US4580255A

    公开(公告)日:1986-04-01

    申请号:US499245

    申请日:1983-05-31

    摘要: A servo circuit for a signal reproducing apparatus for reproducing signals from a record medium such as a disc utilizing an optical pickup, wherein a variable gain amplifier is arranged in a servo loop between a pickup and an actuator so that the pickup is caused to track a signal track in accordance with a servo error signal produced by the variable gain amplifier. A playback condition of a disc is discriminated by detecting the number of errors in a signal reproduced from a recorded signal on the disc by the pickup, and a gain of the variable gain amplifier is controlled by the discrimination output so that the variation of the servo error signal caused by a difference in reflectance between individual discs is eliminated and a loop gain appropriate to an individual disc is automatically set.

    摘要翻译: 一种用于信号再现装置的伺服电路,用于使用光学拾取器从诸如盘的记录介质再现信号,其中可变增益放大器布置在拾取器和致动器之间的伺服环路中,使得拾取器跟踪 根据由可变增益放大器产生的伺服误差信号的信号轨迹。 通过由拾取器检测从盘上的记录信号再现的信号中的错误数来识别盘的重放条件,并且通过鉴别输出来控制可变增益放大器的增益,使得伺服 消除由各个光盘之间的反射率差引起的误差信号,并且自动设置适合于单个光盘的环路增益。

    POWER SUPPLY UNIT
    56.
    发明申请
    POWER SUPPLY UNIT 有权
    供电单元

    公开(公告)号:US20090315401A1

    公开(公告)日:2009-12-24

    申请号:US12307994

    申请日:2007-06-18

    IPC分类号: H02J1/00 H02M3/155

    摘要: The power supply unit has a sample-and-hold circuit that samples a voltage supplied from a power source to a load according to a sample timing signal and holds the voltage as an output set value for the DC/DC converter. The unit supplies a load with an output from the DC/DC converter controlled so that an output voltage of power source (22) becomes an output set value of the DC/DC converter when the voltage of power source (22) drops. Since a voltage corresponding to the voltage of the power source before the voltage drop is set to the output set value of the DC/DC converter, a stable power supply unit is obtained in which the difference is always small between the voltage of the power source in normal times and the output voltage from the DC/DC converter when the voltage of the power source temporarily fluctuates.

    摘要翻译: 电源单元具有采样和保持电路,其根据采样定时信号对从电源提供给负载的电压进行采样,并将该电压保持为DC / DC转换器的输出设定值。 该单元向受到控制的DC / DC转换器的输出提供负载,使得当电源(22)的电压下降时,电源(22)的输出电压变为DC / DC转换器的输出设定值。 由于将与电压下降之间的电源电压相对应的电压设定为DC / DC转换器的输出设定值,因此获得稳定的电源单元,其中电源的电压之间的差异总是很小 在正常情况下,当电源电压暂时波动时,来自DC / DC转换器的输出电压。

    Variable gain amplifier and AC power supply device using the same
    57.
    发明授权
    Variable gain amplifier and AC power supply device using the same 有权
    可变增益放大器和使用其的交流电源装置

    公开(公告)号:US07602247B2

    公开(公告)日:2009-10-13

    申请号:US11915018

    申请日:2006-08-28

    申请人: Masafumi Nakamura

    发明人: Masafumi Nakamura

    IPC分类号: H03F3/45

    CPC分类号: H03G1/0023 H03F3/45085

    摘要: A variable gain amplifier includes first and second power supply terminals arranged to be connected to a power supply, a transconductance amplifier, first and second PN junction elements, a voltage drop element, first and second resistors, a current-generating transistor, and a current mirror. The transconductance amplifier outputs a current corresponding to a difference between a potential of a base of the first initial stage transistor and a potential of a base of the second initial stage transistor. An emitter of the second initial stage transistor is connected to the emitter of the first initial stage transistor at a node. Each of the first and second PN junction elements has a first end connected to the base of the first initial stage transistor and a second end. The voltage drop element is connected between the second end of the first PN junction element and the first power supply terminal. The first resistor is connected between the base of the second initial stage transistor and a first signal source which is a voltage source. The current-generating transistor has a collector connected to the base of the first initial stage transistor and a base connected to the first signal source. The second resistor is connected between the emitter of the current-generating transistor and the second power supply terminal. The current mirror is connected to the node, and allows a current to flow to the node, the current being identical to a current flowing from the second signal source which is a current source. This variable gain amplifier generates no non-linear distortion, and has a small size.

    摘要翻译: 可变增益放大器包括布置成连接到电源,跨导放大器,第一和第二PN结元件,电压降元件,第一和第二电阻器,电流产生晶体管和电流的第一和第二电源端子 镜子。 跨导放大器输出对应于第一初级晶体管的基极的电位和第二初级晶体管的基极的电位之间的差的电流。 第二初级晶体管的发射极在节点处连接到第一初级晶体管的发射极。 第一和第二PN结元件中的每一个具有连接到第一初级晶体管的基极的第一端和第二端。 电压降元件连接在第一PN结元件的第二端和第一电源端子之间。 第一电阻器连接在第二初级晶体管的基极和作为电压源的第一信号源之间。 电流产生晶体管具有连接到第一初级晶体管的基极的集电极和连接到第一信号源的基极。 第二电阻器连接在发电晶体管的发射极和第二电源端子之间。 电流镜连接到节点,并允许电流流向节点,电流与从作为电流源的第二信号源流出的电流相同。 该可变增益放大器不产生非线性失真,并且具有小尺寸。

    Method of producing a polyurethane foam molded article
    58.
    发明授权
    Method of producing a polyurethane foam molded article 失效
    聚氨酯发泡成型体的制造方法

    公开(公告)号:US07540985B2

    公开(公告)日:2009-06-02

    申请号:US11302838

    申请日:2005-12-14

    IPC分类号: B29C44/06

    摘要: A method of producing a polyurethane molded article is provided, in which one molding machine which can provide distinctly polyisocyanate component(s) and two kinds of polyol components is used, and prior to completion of the feed of a first polyurethane mixture liquid containing a polyisocyanate and a polyol component without a blowing agent into a mold, a second polyurethane mixture liquid containing a polyisocyanate and a second polyol component with a blowing agent is fed into the mold. The method produces, in a single stage, a polyurethane foam molded article having the skin or high density portion selectively formed on portions of the molded article actually requiring them, where the proportions of the skin and the high density portion and the foamed core can be varied freely.

    摘要翻译: 提供了一种制备聚氨酯模塑制品的方法,其中使用可提供明显多异氰酸酯组分和两种多元醇组分的一个成型机,并且在完成含有多异氰酸酯的第一聚氨酯混合物液体之前, 将没有发泡剂的多元醇成分加入到模具中,将含有多异氰酸酯的第二聚氨酯混合液和具有发泡剂的第二多元醇成分进料到模具中。 该方法在单个阶段中产生具有选择性地形成在实际需要的模制品的部分上的皮肤或高密度部分的聚氨酯泡沫模制品,其中皮肤和高密度部分和发泡芯的比例可以是 随意变化