Disk reproducing circuit with automatic gain control
    1.
    发明授权
    Disk reproducing circuit with automatic gain control 失效
    具有自动增益控制的磁盘重放电路

    公开(公告)号:US5631891A

    公开(公告)日:1997-05-20

    申请号:US332568

    申请日:1994-10-31

    IPC分类号: G11B7/005 G11B13/04 G11B20/10

    摘要: Disclosed is an optical disk apparatus having a zero-cross signal generating unit for differentiating a reproduced signal read from an optical disk and outputting a zero-cross signal when the differentiated signal crosses the zero level, and a gate signal generating unit for generating a gate signal using the reproduced signal, wherein a data pulse is outputted when the zero-cross signal is generated while the gate signal is being produced. A clamping circuit clamps the peak of a reproduced signal from an optical disk, an amplitude comparator compares the amplitude of a clamped signal, which is outputted by the clamping circuit, with a reference voltage, and an AGC control unit controls the gain of a variable-gain amplifier by generating a control voltage signal in dependence upon an amplitude difference. The gate signal generating unit generates the gate signal upon comparing the clamped signal outputted by the clamping circuit with a prescribed signal level. A data-pulse output unit outputs the data pulse when the zero-cross signal of the differentiated reproduced signal is generated while the gate signal is being produced.

    摘要翻译: 公开了一种具有零交叉信号产生单元的光盘装置,用于对从光盘读出的再现信号进行微分,并且当微分信号越过零电平时输出零交叉信号;门信号产生单元,用于产生门 信号,其中当产生栅极信号时产生过零信号时输出数据脉冲。 钳位电路将来自光盘的再现信号的峰值钳位,幅度比较器将由钳位电路输出的钳位信号的幅度与参考电压进行比较,并且AGC控制单元控制变量的增益 - 通过根据幅度差产生控制电压信号。 门信号发生单元在将钳位电路输出的钳位信号与规定的信号电平进行比较时,生成栅极信号。 当产生栅极信号时,产生微分再生信号的零交叉信号时,数据脉冲输出单元输出数据脉冲。

    Process for producing α,β-unsaturated aldehyde compounds
    2.
    发明授权
    Process for producing α,β-unsaturated aldehyde compounds 有权
    制备α,β-不饱和醛化合物的方法

    公开(公告)号:US07732644B2

    公开(公告)日:2010-06-08

    申请号:US12095800

    申请日:2006-11-08

    IPC分类号: C07C45/72 C07C29/14

    摘要: The present invention relates to processes for producing α,β-unsaturated aldehyde compounds and unsaturated alcohols with a good yield. There is provided a process for producing and α,β-unsaturated aldehyde compound including the step of subjecting a raw aldehyde compound to an intermolecular condensation reaction in the presence of an amine and a protonic acid having 4 to 20 carbon atoms or a salt thereof; and a process for producing an unsaturated alcohol including the step of subjecting the α,β-unsaturated aldehyde compound to a reduction reaction.

    摘要翻译: 本发明涉及以良好的产率生产α,β-不饱和醛化合物和不饱和醇的方法。 提供了一种生产α,β-不饱和醛化合物的方法,包括在胺和具有4〜20个碳原子的质子酸或其盐的存在下使原料醛化合物进行分子间缩合反应的步骤 ; 以及一种制备不饱和醇的方法,包括使α,β-不饱和醛化合物进行还原反应的步骤。

    PROCESS FOR PRODUCING ALPHA, BETA-UNSATURATED ALDEHYDE COMPOUNDS
    3.
    发明申请
    PROCESS FOR PRODUCING ALPHA, BETA-UNSATURATED ALDEHYDE COMPOUNDS 有权
    生产ALPHA,不饱和的二异氰酸酯化合物的方法

    公开(公告)号:US20090171124A1

    公开(公告)日:2009-07-02

    申请号:US12095800

    申请日:2006-11-08

    IPC分类号: C07C45/45 C07C37/20

    摘要: The present invention relates to processes for producing α,β-unsaturated aldehyde compounds and unsaturated alcohols with a good yield. There is provided a process for producing and α,β-unsaturated aldehyde compound including the step of subjecting a raw aldehyde compound to an intermolecular condensation reaction in the presence of an amine and a protonic acid having 4 to 20 carbon atoms or a salt thereof; and a process for producing an unsaturated alcohol including the step of subjecting the α,β-unsaturated aldehyde compound to a reduction reaction.

    摘要翻译: 本发明涉及以高产率生产α,β-不饱和醛化合物和不饱和醇的方法。 提供了一种制备α,β-不饱和醛化合物的方法,包括在胺和具有4〜20个碳原子的质子酸或其盐的存在下使原料醛化合物进行分子间缩合反应的步骤; 以及制备不饱和醇的方法,包括使α,β-不饱和醛化合物进行还原反应的步骤。

    Process for production of 5-arylpentanols
    4.
    发明授权
    Process for production of 5-arylpentanols 有权
    5-芳基戊醇的制备方法

    公开(公告)号:US06600079B2

    公开(公告)日:2003-07-29

    申请号:US10254661

    申请日:2002-09-26

    IPC分类号: C07C2700

    CPC分类号: C07C29/17 C07C33/20

    摘要: A process for producing a 5-arylpentanol of formula (2): wherein R1 represents an aryl group which may be substituted with one or two or more of an alkyl or alkoxy group and has 6 to 12 carbon atoms in total, R3 represents a hydrogen atom, or an alkyl or alkenyl group of 1 to 6 carbon atoms, and R4 represents R2 defined below when R2 is a monovalent group or represents R2H when R2 is a divalent group, which comprises effecting hydrogenolysis of a pyran compound of formula (1): wherein, R1 and R3 are as defined above, R2 represents a hydrogen atom, an alkyl or alkenyl group of 1 to 6 carbon atoms, or an alkylidene or alkenylidene group of 1 to 6 carbon atoms, and a dotted line represents a possible bond and any one of the three bonds represented by dotted lines and solid lines is a double bond, in the presence of one or more catalysts selected from (a) a catalyst carrying two or more elements selected from noble metals in Group VIII in the periodic table and (b) an acid type palladium-supporting catalyst. 5-arylpentanols can be prepared in a high yield with low production of hydrocarbons without causing a problem with regard to corrosion of process equipment.

    摘要翻译: 一种制备式(2)的5-芳基戊醇的方法:其中R 1表示可被一个或两个或多个烷基或烷氧基取代并且总共具有6至12个碳原子的芳基,R 3表示氢 原子或1〜6个碳原子的烷基或烯基,R4表示当R2为一价基团时定义的R2,或R2表示二价基团时为R2H,其包括使式(1)的吡喃化合物进行氢解, 其中,R 1和R 3如上定义,R 2表示氢原子,1〜6个碳原子的烷基或链烯基或碳原子数为1〜6的亚烷基或亚链烯基,虚线表示可能的键 并且在一种或多种催化剂的存在下,由虚线和实线表示的三个键中的任一个是双键,所述催化剂选自(a)载有选自元素周期表中第Ⅷ族中的贵金属的两种或更多种元素的催化剂 和(b)酸型钯 - 移植催化剂。 5-芳基戊醇可以以高产率制备,低产烃量,而不会对工艺设备的腐蚀造成问题。

    Optical storage device made thinner by substituting electrical means for
capabilities of sensors
    6.
    发明授权
    Optical storage device made thinner by substituting electrical means for capabilities of sensors 失效
    光学存储设备通过用电气装置替代传感器的能力而变薄

    公开(公告)号:US5966353A

    公开(公告)日:1999-10-12

    申请号:US959454

    申请日:1997-10-28

    摘要: There is provided an optical storage device that can position a lens carriage and objective lens even when position sensors for the lens carriage and objective lens are excluded in an effort to make an optical disk unit thinner. In the optical storage device, immediately after an optical disk is loaded in a main body, the cutoff frequency of a filter lying on a path of a reproduction signal is temporarily changed to a lower frequency. A spacing of sectors of the optical disk is detected using a signal sent from the filter. A type of an optical storage medium and a position of a current reproduction track are detected on the basis of the detected sector spacing and data stored in a memory.

    摘要翻译: 提供了一种光学存储装置,即使在排除透镜滑架和物镜的位置传感器以致使光盘单元更薄时,其也可以定位透镜滑架和物镜。 在光存储装置中,在将光盘装入主体之后,将再现信号的路径上的滤波器的截止频率临时变更为较低的频率。 使用从滤波器发送的信号来检测光盘扇区的间隔。 基于检测到的扇区间隔和存储在存储器中的数据来检测光存储介质的类型和当前再现轨迹的位置。

    Alcohol compounds
    8.
    发明授权
    Alcohol compounds 有权
    酒精化合物

    公开(公告)号:US07642385B2

    公开(公告)日:2010-01-05

    申请号:US12306430

    申请日:2007-06-21

    IPC分类号: C07C35/18 A61K8/18

    摘要: The present invention relates to alcohol compounds having a scent of natural lily of the valley substantially without any woody scent limiting their applications to raw materials of perfume preparations, and a process for producing the alcohol compounds. The alcohol compounds are represented by the following general formula (I): wherein R1 is a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms; and any one of dotted lines represents a double bond, and the remaining three dotted lines each represent a single bond.

    摘要翻译: 本发明涉及具有山谷天然百合的香味的醇类化合物,其基本上没有任何木香味,限制了它们对香料制剂原料的应用,以及制备醇化合物的方法。 醇化合物由以下通式(I)表示:其中R 1是氢原子或具有1至4个碳原子的烃基; 虚线中的任一个表示双键,其余三条虚线表示单键。

    Storage apparatus using variable read clock frequencies for reading ZCAV
recording medium
    10.
    发明授权
    Storage apparatus using variable read clock frequencies for reading ZCAV recording medium 失效
    使用可变读取时钟频率读取ZCAV记录介质的存储设备

    公开(公告)号:US6014349A

    公开(公告)日:2000-01-11

    申请号:US17853

    申请日:1998-02-03

    摘要: A frequency synthesizer generates, through setting of a frequency control value, a reference clock having a frequency necessary to read data from a medium. When reading data from an arbitrary position on the medium, a setting control unit sets in the frequency synthesizer a frequency control value corresponding to the zone position, thereby allowing the frequency synthesizer to control a reference clock frequency, and sets in a single or a plurality of processing units other than the frequency synthesizer a predetermined control value corresponding to the read position on the medium. A settling wait processing unit calculates a settling time T1 required for a frequency of the frequency synthesizer to become stable and a setting processing time T2 necessary for the setting control of the other processing unit, and defines as a wait time Tw a difference (T1-T2) between the settling time T1 and the setting processing time T2, during which wait time Tw a migration to the subsequent processing is kept waiting.

    摘要翻译: 频率合成器通过设置频率控制值来生成具有从介质读取数据所需的频率的参考时钟。 当从介质上的任意位置读取数据时,设置控制单元在频率合成器中设置与区域位置对应的频率控制值,从而允许频率合成器控制参考时钟频率,并且设置为单个或多个 处于与频率合成器以外的处理单元相对应于介质上的读取位置的预定控制值。 建立等待处理单元计算频率合成器的频率变得稳定所需的建立时间T1和对其他处理单元的设置控制所需的设置处理时间T2,并将其定义为等待时间Tw的差(T1- 在建立时间T1和设定处理时间T2之间的等待时间Tw等待到后续处理的迁移。