摘要:
A record carrier (40) of a removable type has an information plane of a layer of magnetic material on a substrate constituting an array of bit locations (11). A magnetic state of the material represents the value of each bit location. A storage device (35) has an interface surface (32) for cooperating with the information plane. The interface surface has an array (31) of electro-magnetic elements that are sensitive to said magnetic state of the electro-magnetic material. The record carrier and device have alignment elements (38, 41) for positioning the bit locations near the electro-magnetic elements within a near-field working distance between a bit location and the corresponding electro-magnetic element when the record carrier is mounted in the device.
摘要:
An information storage apparatus comprises a one or more storage media (168), which include a plurality of information tracks. Each storage medium (168) has a head assembly (170) having a substantially planar surface and a plurality of read/write heads positioned in registry with said information tracks. The read/write heads are arranged substantially in the plane of the planar surface. The information storage medium (168) and the head assembly (170) are arranged in mutually sliding abutment such that the read/write heads are substantially in sliding contact with the outer surface of the information storage medium in use. In another aspect an information storage and retrieval apparatus comprises an information storage medium (168) comprising an information storage area, and an array (170) of information read and/or write heads. The information storage medium (168) and array of heads (170) are arranged to be oscillated with respect to each other in use such that each region of the information storage area is aligned with at least one of the read/write heads during the oscillation.
摘要:
According to one aspect, methods and systems for determining the position of a recording head using existing data structures on magnetic storage media are provided. In one example, a recording head writes data to an active track on a magnetic storage tape, the recording head including a write element and a read element in a known spatial relationship, wherein the read element is configured to access at least a portion of a reference track when the write element is accessing the active track. A controller determines a relative position of the transducer element to the reference track and repositions the recording head to write data to the active track. The read element may be a backward channel reader or dedicated read element of the recording head for reading reference tracks during read and/or write operations.
摘要:
The invention concerns a digital data read/write device, comprising a recording head (10) integral with a moving element (11), which moves above the recording medium (12) provided with several tracks, wherein said head (10) comprises several microtips (13) operating in parallel, each associated with a guided optical circuit, which address the tracks of the recording medium (12). Each microtip (13) operates both in read and write mode. The guided optical circuit, associated with each microtip: operates, in writing mode as a light guide up to the photosensitive zone of the tip; collects, in reading mode the signal of diffraction of the incident wave on the tip. The guided optical circuits are directly connected to the processing circuits (20) through an optical bus (21).
摘要:
Cet agencement de têtes magnétiques d'enregistrement/lecture comprend plusieurs paires (PM₁-PM₂) de pôles. Les pôles d'une même paire sont séparés par un entrefer d'enregistrement (E0 à E7). Les longueurs des entrefers sont différentes selon les paires de pôles. Pour l'enregistrement d'informations sur un support d'enregistrement (BM) défilant devant les têtes magnétiques, des premiers entrefers (E0 par exemple) ont une première longueur telle qu'ils permettent d'enregistrer sur une largeur du support et que des deuxièmes entrefers (E1 par exemple) ont une deuxième longueur inférieure à la première longueur et sont situés par rapport aux premiers entrefers de façon à enregistrer dans ladite largeur du support en superposition aux premiers entrefers. Applications: Têtes d'enregistrement/lecture multipistes.
摘要:
Système de lecture d'un support d'enregistrement multipiste comportant un dispositif permettant de lire, sur la largeur de chaque piste, un nombre n d'échantillons d'information. Ce système comporte :
un filtre (1) permettant d'effectuer plusieurs combinaisons de plusieurs échantillons d'une piste, ces combinaisons étant décalées entre elles d'un ou plusieurs échantillons ; un circuit de sous-échantillonnage (2) choisissant dans les différentes combinaisons d'une piste, sous la commande d'un prédicteur de position (3), une combinaison déterminée ; un circuit de calcul d'erreur (4) de position calculant l'erreur de position de la combinaison choisie et fournissant un signal de correction d'erreur (e i ) au prédicteur de position(3).
摘要:
An electronic transducer array and transfer device and method which provides for activation of selected transducers at selected times. In one application, the device performs data transfer by a combination of suitably interconnected submillimeter transducers (4) capable of sensing and/or actuating microscopic data-storage cells, and electronic switching (402, 602, 702) to activate selected individual transducers. One embodiment of the invention provides for magnetic transducers for reading (304) and writing (302) on a magnetic medium (8). Another embodiment of the invention provides tunneling electron transducers (10) arranged in an array.