公开(公告)号：US06668057B1

公开(公告)日：2003-12-23

申请号：US09717229

申请日：2000-11-22

申请人： Eiji Otsuka ,  Takeshi Yamashita ,  Yoshiko Hase

发明人： Eiji Otsuka ,  Takeshi Yamashita ,  Yoshiko Hase

IPC分类号： H04M300

CPC分类号： H04Q1/4575 ,  H04M1/505

摘要： An arithmetic processing section is designed to repeatedly execute product-sum arithmetic processing a number of times equal to the number of samples corresponding to each of the frequencies, in which a value obtained by subtracting a product-sum arithmetic value two sampling periods before from an input signal and a value obtained by multiplying a product-sum arithmetic value one sampling period before by a coefficient corresponding to a reference frequency contained in a DTMF signal are added. A comparator extracts an output value equal to or larger than a predetermined threshold value from the product-sum arithmetic values obtained by the arithmetic processing section. A matrix section determines the type of DTMF signal on the basis of at least two output values extracted by the comparator.

摘要翻译： 算术处理部被设计为重复执行乘数和运算处理等于与每个频率相对应的采样数的次数，其中通过从第一频率的两个采样周期减去乘积和运算值而获得的值 输入信号和通过将乘以与采样DTMF信号中包含的参考频率相对应的系数的乘法和运算值乘以一个采样周期而获得的值。 A比较器从由算术处理部分获得的积和运算值中提取等于或大于预定阈值的输出值。 矩阵部分基于由比较器提取的至少两个输出值确定DTMF信号的类型。

公开(公告)号：US06600797B1

公开(公告)日：2003-07-29

申请号：US09517942

申请日：2000-03-03

申请人： Atsushi Hasegawa ,  Tetsuya Aoki ,  Takeshi Yamashita

发明人： Atsushi Hasegawa ,  Tetsuya Aoki ,  Takeshi Yamashita

IPC分类号： H03D324

CPC分类号： H03L7/095 ,  H03L7/087 ,  H03L7/0891 ,  H03L7/113 ,  H04L7/033

摘要： In order to solve the problem that since a loop filter constant suitable for asynchronous state cannot be selected in the conventional phase frequency synchronism circuit, it takes a long time to synchronize the input data and the clock signal from the asynchronous state, the present invention is to propose a phase frequency synchronism circuit including a phase comparator for generating a voltage according to the phase difference of the clock signal to the input signal, a frequency comparator for deciding if the frequency of the clock signal is higher or lower than the transmission rate of the input signal and generating a binary signal, a synchronous identifying unit for deciding if the input signal and the clock signal are synchronized in their phases and frequencies, a first switch that receives the output from the phase comparator and is closed and opened when the synchronous identifying unit decides that they are synchronized and not synchronized, respectively, a second switch that receives the output from the frequency comparator and is opened and closed when the synchronous identifying unit decides that they are synchronized and not synchronized, respectively, a loop filter that receives the outputs from the first and second switches, and a voltage controlled oscillator that oscillates on the basis of the output from the loop filter.

摘要翻译： 为了解决由于在常规的相位频率同步电路中不能选择适合于异步状态的环路滤波器常数的问题，从异步状态同步输入数据和时钟信号需要很长时间，本发明是 提出一种相位频率同步电路，该相位频率同步电路包括：相位比较器，用于根据时钟信号与输入信号的相位差产生电压;频率比较器，用于判定时钟信号的频率是否高于或低于 输入信号并产生二进制信号，同步识别单元，用于判定输入信号和时钟信号是否在其相位和频率上同步;第一开关，其接收来自相位比较器的输出，并且当同步 识别单元分别决定它们是同步的，而不是同步的 在接收来自频率比较器的输出时，当同步识别单元分别决定它们同步并且不同步时，分别开启和关闭一个接收来自第一和第二开关的输出的环路滤波器和振荡的压控振荡器 在循环滤波器的输出的基础上。

公开(公告)号：US06595708B1

公开(公告)日：2003-07-22

申请号：US09456704

申请日：1999-12-09

申请人： Takeshi Yamashita

发明人： Takeshi Yamashita

IPC分类号： H04B1000

CPC分类号： H04B10/695

摘要： An optical receiver circuit comprising: a pre-amplifier for amplifying a signal supplied from a photodetector to output positive and negative signals; first and second peak hold circuits for detecting maximum levels of these positive and negative signals respectively; an offset canceler circuit for compensating the positive signal at the maximum level of the negative signal, for compensating the negative signal at the maximum level of the positive signal, and for then performing differential amplification; and a level shift circuit for replacing an output signal level of the first peak hold circuit with a signal level higher than an actual value for a period of time that light input to the photodetector is in a no-input signal state.

摘要翻译： 一种光接收器电路，包括：前置放大器，用于放大从光电检测器提供的信号以输出正和负信号; 用于分别检测这些正和负信号的最大电平的第一和第二峰值保持电路; 偏移消除器电路，用于补偿负信号的最大电平处的正信号，用于补偿在正信号的最大电平处的负信号，然后进行差分放大; 以及电平移位电路，用于在输入到光电检测器的光处于无输入信号状态的一段时间内，用高于实际值的信号电平替换第一峰值保持电路的输出信号电平。

公开(公告)号：US4740852A

公开(公告)日：1988-04-26

申请号：US77988

申请日：1987-07-24

申请人： Yukiya Shiraishi ,  Takeshi Yamashita

发明人： Yukiya Shiraishi ,  Takeshi Yamashita

IPC分类号： G11B17/03 ,  G11B17/032 ,  G11B17/04 ,  G11B17/34 ,  G11B5/016 ,  G11B17/02

CPC分类号： G11B17/043 ,  G11B17/032

摘要： A disk presser mechanism in a magnetic recording and reproducing apparatus includes a rotatable turntable, a clamp member for clamping a disk on the turntable, a clamp arm supporting the clamp member and movable toward and away from the turntable, a drive lever operatively coupled to the clamp arm, an actuator cam for pressing the drive lever to move the clamp arm in a direction to cause the clamp member to clamp the disk on the turntable, a pad holder having a pad for confronting the disk, a spring member for urging the pad to be pressed against the disk, and an engaging portion acting between the drive lever and the pad holder for moving the pad holder away from the disk when the drive lever is released by the actuator cam to unclamp the disk.

摘要翻译： 磁记录和再现装置中的盘压机构包括可旋转的转盘，用于将盘固定在转盘上的夹紧构件，支撑夹紧构件并可朝向和远离转台移动的夹紧臂，可操作地连接到转盘的驱动杆 夹紧臂，致动器凸轮，用于按压驱动杆以沿夹持构件将盘夹持在转台上的方向移动夹持臂，具有用于面对盘的垫的垫架，用于推动垫的弹簧构件 以及当所述驱动杆被所述致动器凸轮释放以使所述盘松开时，所述接合部分作用在所述驱动杆和所述焊盘固定器之间，用于将所述焊盘保持架远离所述盘移动。

公开(公告)号：US4630154A

公开(公告)日：1986-12-16

申请号：US677183

申请日：1984-12-03

申请人： Yukiya Shiraishi ,  Takeshi Yamashita

发明人： Yukiya Shiraishi ,  Takeshi Yamashita

IPC分类号： G11B21/12 ,  G11B5/54 ,  G11B17/028 ,  G11B17/04 ,  G11B25/04 ,  G11B5/012 ,  G11B5/016 ,  G11B21/22

CPC分类号： G11B17/043 ,  G11B5/54

摘要： A flexible disk apparatus has a loading arm which constitutes a part of a magnetic head carriage and moves at least one of a pair of opposing magnetic heads toward the other, and a lever which is pivotally attached to the apparatus for closing and opening a slit through which a flexible disk is loaded and unloaded. The flexible disk apparatus is provided with an interlocking mechanism adapted to actuate the loading arm by means of a cam which is secured to one end of a pivot of the lever which is opposite from the end at which the lever is secured. The cam extends in the same direction as that of the lever. The flexible disk apparatus is further provided with a protection arm which is secured to an intermediate portion of the pivot of the lever and extends normal to the longitudinal axis of the lever. In addition, a protection cam is disposed so as to be pivoted by loading and unloading of the flexible disk and has a surface that engages with the protection arm when the apparatus has no disk inserted therein so as to prevent pivoting of the lever.

摘要翻译： 柔性盘装置具有装载臂，该装载臂构成磁头托架的一部分，并将一对相对的磁头中的至少一个朝向另一个移动，以及一个可枢转地附接到该装置上的闭合和打开狭缝的杆 其中一个软盘被加载和卸载。 柔性盘装置设置有互锁机构，该互锁机构适于通过固定到杆的枢轴的一端的与凸起杆固定的端部相对的凸轮来驱动装载臂。 凸轮沿与杠杆相同的方向延伸。 柔性盘装置还设置有保护臂，该保护臂固定到杆的枢轴的中间部分并且垂直于杠杆的纵向轴线延伸。 此外，保护凸轮被设置成通过装载和卸载柔性盘而枢转，并且当该装置没有插入盘中时，具有与保护臂接合的表面，以防止杆的枢转。

公开(公告)号：US3949061A

公开(公告)日：1976-04-06

申请号：US412129

申请日：1973-11-02

申请人： Takeshi Yamashita ,  Tooru Ide ,  Sueo Kamada ,  Takao Kitamura

发明人： Takeshi Yamashita ,  Tooru Ide ,  Sueo Kamada ,  Takao Kitamura

IPC分类号： C01C3/00 ,  C02F1/24

CPC分类号： C02F1/24 ,  B01D21/10 ,  B01D21/14 ,  B01D21/16 ,  B01D21/2433 ,  B01D21/2488 ,  C01C3/003

摘要： Dicyan is produced by reacting hydrocyanic acid with oxygen or oxygen-containing inert gas in an aqueous solution of copper nitrate or copper nitrate and one or more nitrates of alkali metals, alkaline earth metals or aluminum at a pH of from -0.5 to 1.5. Almost all the small quantity of nitrogen oxides by-produced in the reaction can be removed by absorbing them in the catalyst solution in which the reaction is terminated or retarded and the resulting solution can be reused by recycling.

摘要翻译： 在硝酸铜或硝酸铜的水溶液和一种或多种碱金属，碱土金属或铝的硝酸盐中，在-0.5至1.5的pH下，使氢氰酸与氧或含氧惰性气体反应制备二氰。 反应中副产的几乎所有少量的氮氧化物可以通过将其吸收在反应终止或延迟的催化剂溶液中并通过再循环再利用来除去。