公开(公告)号：US3638203A

公开(公告)日：1972-01-25

申请号：US3638203D

申请日：1969-07-30

Applicant: IBM

Inventor： PATEL ARVINDKUMAR M

IPC: G11C11/36 ,  H03K3/313 ,  H03K3/35 ,  H03K3/352 ,  G11C7/00 ,  G11C11/34

CPC classification number: H03K3/313 ,  G11C11/36 ,  H03K3/35 ,  H03K3/352

Abstract: A memory array comparable to a core memory may be built up by use of a low-power silicon-control rectifier as the bistable element in each memory cell. In the preferred embodiment the gate of the low-power SCR is not used, and the four-layer device is referred to as a trigger diode. The trigger diode is driven into a high-conductance state by exceeding the breakover voltage and into a low-conductance state by dropping the current below the holding current. During the high-conductance state, the holding current is guaranteed by a bias circuit directly connected to the anode of the trigger diode. The diode is switched from one bistable state to the other by transient voltages generated in an adjoining circuit. The transients are coupled to the trigger diode by a capacitor. Both the read and write operation are halfselect operations so that a single memory cell may be selectively written to a '''' 1'''' or to a '''' 0'''' stable state. Readout is accomplished by half-select driving one coordinate and monitoring the drive line on the orthogonal coordinate.

Abstract translation: 可以通过使用低功率硅控制整流器作为每个存储器单元中的双稳​​态元件来构建与核心存储器相当的存储器阵列。 在优选实施例中，低功率SCR的栅极不被使用，并且四层器件被称为触发二极管。 通过将电流降低到保持电流以下，触发二极管通过超过跳变电压而被驱动成高电导状态并进入低电导状态。 在高电导状态期间，保持电流由直接连接到触发二极管的阳极的偏置电路保证。 二极管通过邻接电路中产生的瞬态电压从一个双稳态切换到另一个。 瞬态通过电容器耦合到触发二极管。 读取和写入操作都是半选择操作，使得单个存储器单元可以被选择性地写入“1”或“0”稳定状态。 通过半选择驱动一个坐标并监视正交坐标上的驱动线来实现读数。

公开(公告)号：US3662364A

公开(公告)日：1972-05-09

申请号：US3662364D

申请日：1969-12-22

Applicant: IBM

Inventor： PATEL ARVINDKUMAR M ,  WELLBROCK ANTON G

IPC: G11B11/10 ,  G11B11/105 ,  G11B20/16 ,  G11C13/04

CPC classification number: G11B11/10

Abstract: A magneto-optic transducing system is utilized to convert a magnetic recording into electrical signals. For purposes of decoding the electrical signals into data, it is necessary that the electrical signal transduced from a magnetic recording be synchronized with a reference clock signal. Synchronization is obtained herein by fixing the frequency of the reference clock signal and varying the frequency of the data signal as transduced from the magnetic recording. The frequency and phase of the data signal are varied by varying the scanning sweep speed used in a magneto-optic transducer. Two alternative embodiments are shown. In the first embodiment, the scanning is accomplished by a vidicon which scans the magneto-optic image of a large block of data. In an alternative embodiment, a cathode ray tube is used as the light source for the magneto-optic transducer so that each bit may be separately scanned by deflecting the beam in the cathode ray tube. Synchronization is obtained by comparing the frequency and phase of the data signal from the transducing system with the frequency and phase of the reference clock and feeding back an error signal to the deflection coils of the cathode ray tube or the vidicon. The correction signal increases or decreases the sweep speed as is necessary to synchronize the data with the clock.

Abstract translation: 磁光转换系统用于将磁记录转换为电信号。 为了将电信号解码为数据，必须将从磁记录转换的电信号与参考时钟信号同步。 这里通过固定参考时钟信号的频率并改变从磁记录传送的数据信号的频率来获得同步。 数据信号的频率和相位通过改变在磁光换能器中使用的扫描扫描速度来改变。 示出了两个替代实施例。 在第一实施例中，扫描是通过扫描大块数据的磁光图像的视频来完成的。 在替代实施例中，阴极射线管用作磁光变换器的光源，使得可以通过使阴极射线管中的光束偏转来单独扫描每个位。 通过将来自转换系统的数据信号的频率和相位与参考时钟的频率和相位进行比较并将误差信号反馈到阴极射线管或视频体的偏转线圈来获得同步。 校正信号使数据与时钟同步所需的扫描速度提高或降低。

公开(公告)号：CA909930A

公开(公告)日：1972-09-12

申请号：CA909930D

Applicant: IBM

Inventor： PATEL ARVINDKUMAR M ,  WELLBROCK ANTON G

IPC: G11B11/10 ,  G11C13/04