公开(公告)号：US4739431A

公开(公告)日：1988-04-19

申请号：US790221

申请日：1985-10-22

申请人： Syuhei Yasuda ,  Katubumi Koyanagi ,  Hideyoshi Yamaoka

发明人： Syuhei Yasuda ,  Katubumi Koyanagi ,  Hideyoshi Yamaoka

IPC分类号： G11B5/39 ,  G11B5/31 ,  G11B20/10 ,  G11B5/147

CPC分类号： G11B20/10527 ,  G11B5/3103

摘要： One of the preferred embodiments of the present invention provides an entirely novel thin-film magnetic-head assembly for a digital-signal recording/reproducing system using multiple tracks. The assembly comprises electronic-circuit components including a combined capacitor/resistor a constant-current source, an amplifier, and an analogue-signal multiplexer, all located inside a casing that surrounds the thin-film magnetic-head. These electronic circuits are present on the upper and lower surfaces of the casing and are connected by means of an elastomer so that these circuits are integrally connected to the thin-film magnetic head.The thin-film magnetic head of the casing may alternatively be bent and extended so that electronic-circuit components can be mounted to it.

摘要翻译： 本发明的优选实施例之一提供了一种用于使用多个轨道的数字信号记录/再现系统的完全新颖的薄膜磁头组件。 组件包括电子电路部件，包括组合的电容器/电阻器，恒流源，放大器和模拟信号多路复用器，都位于围绕薄膜磁头的外壳内。 这些电子电路存在于壳体的上表面和下表面上，并且通过弹性体连接，使得这些电路与薄膜磁头一体地连接。 壳体的薄膜磁头可以可选地弯曲和延伸，使得可以将电子电路部件安装到其上。

公开(公告)号：US4700241A

公开(公告)日：1987-10-13

申请号：US843722

申请日：1986-03-25

申请人： Syuhei Yasuda ,  Hiroshi Ii ,  Taizo Sasada

发明人： Syuhei Yasuda ,  Hiroshi Ii ,  Taizo Sasada

IPC分类号： G11B20/14 ,  G11B5/008 ,  G11B20/10 ,  G11B20/22 ,  H03K5/00 ,  H04L7/033 ,  G11B5/09

CPC分类号： G11B20/22 ,  G11B20/10009 ,  G11B20/10527 ,  G11B5/00817 ,  H04L7/0334

摘要： An apparatus for recording and reproducing digital signals includes a detector for detecting and producing a phase data signal of a sampled point of the digital signal, a first comparator for comparing a first phase data signal at one sampling point and a second phase data signal at one previous sampling point, a second comparator for comparing a predetermined value with a phase difference between the second phase data and newly detected phase data, a condition detecting means, utilizing the results of the first and second comparators, for detecting whether two adjacent sampling points are within a reference phase period, and sampling pulse generating means for generating one sampling pulse when the two sampling points are separated by a distance equal to the reference phase period, two sampling pulses when the distance is greater than the reference phase period; and no sampling pulse when the distance is less than the reference phase period.

摘要翻译： 一种用于记录和再现数字信号的装置包括用于检测和产生数字信号的采样点的相位数据信号的检测器，用于将一个采样点处的第一相位数据信号和一个采样点的第二相位数据信号进行比较的第一比较器 先前采样点，用于将预定值与第二相位数据与新检测到的相位数据之间的相位差进行比较的第二比较器，利用第一和第二比较器的结果检测两个相邻采样点是否为 以及采样脉冲发生装置，用于当两个采样点被分离距离等于参考相位周期的距离时产生一个采样脉冲，当距离大于参考相位周期时，产生两个采样脉冲; 当距离小于参考相位周期时，无采样脉冲。

公开(公告)号：US4845574A

公开(公告)日：1989-07-04

申请号：US875711

申请日：1986-06-18

申请人： Hiroshi Ii ,  Katsubumi Koyanagi ,  Syuhei Yasuda

发明人： Hiroshi Ii ,  Katsubumi Koyanagi ,  Syuhei Yasuda

IPC分类号： G11B20/14 ,  G11B20/10 ,  G11B20/22

CPC分类号： G11B20/10009 ,  G11B20/225

摘要： An apparatus for recording and reproducing a digital data signal carrying digital information at each periodically appearing reference "P1" phase includes a detector for detecting and producing a phase data signal at each sampling point. Two subsequently sampled phase data are stored in latches for use of the digital data signal by three signal comparators. The first comparator compares the first sampled phase data signal and the second sampled phase data signal. The second comparator compares the first sampled phase data signal with a predetermined value, and the third comparator compares the second sampled phase data signal with the same predetermined value. Utilizing the outputs of the three comparators, a phase condition detector detects whether or not a reference phase is contained between two subsequent sampling points. A detection pulse generator is provided which generates a data detection pulse when the phase condition detector detects the reference phase.

摘要翻译： 用于在每个周期性出现的参考“P1”阶段记录和再现携带数字信息的数字数据信号的装置包括用于在每个采样点检测和产生相位数据信号的检测器。 两个随后采样的相位数据被存储在锁存器中以供三个信号比较器使用数字数据信号。 第一比较器比较第一采样相位数据信号和第二采样相位数据信号。 第二比较器将第一采样相位数据信号与预定值进行比较，并且第三比较器将第二采样相位数据信号与相同的预定值进行比较。 利用三个比较器的输出，相位条件检测器检测在两个后续采样点之间是否包含参考相位。 提供检测脉冲发生器，当相位条件检测器检测到参考相位时，产生数据检测脉冲。