公开(公告)号：EP0091206A3

公开(公告)日：1985-03-27

申请号：EP83301252

申请日：1983-03-08

Applicant: AMPEX CORPORATION

Inventor： Fawkes, John S.

IPC: H03K04/02 ,  H03K04/94 ,  G11B05/02 ,  G11B05/027

CPC classification number: G11B5/02 ,  H03K4/023

Abstract: A ramp generator suitable for controlling bias or erase heads in magnetic recording includes an integrator (40) which produces a relatively slow ramp signal at values associated with the non-linear region of the recording characteristic and a steeper ramp in the linear region. Additional input resistors (71, 72) are switched in parallel with the input resistor (23) of the amplifier to alter the time constant of integration when particular values of the ramp signal are detected by comparators (77, 78).

公开(公告)号：EP0019799A3

公开(公告)日：1983-01-12

申请号：EP80102664

申请日：1980-05-13

Applicant: Siemens Aktiengesellschaft

Inventor： Fredrich, Joachim ,  Klusacek, Michael ,  Fredrich, Detlef ,  Schrumpf, Carl-Eduard, Dipl.-Ing.

IPC: G07C05/08 ,  G11B05/027

CPC classification number: G11B15/005 ,  G07C5/0875

公开(公告)号：WO1991011803A1

公开(公告)日：1991-08-08

申请号：PCT/JP1991000091

申请日：1991-01-28

Applicant: SANYO ELECTRIC CO., LTD. ,  ANZAI, Fukuji

Inventor： SANYO ELECTRIC CO., LTD.

IPC: G11B05/027

CPC classification number: H03F1/083 ,  G11B5/02 ,  H03F1/34 ,  H03F1/48 ,  H03F3/45479

Abstract: A head amplifier which inputs signals reproduced from a head. Its technical problem is to prevent the occurence of offset in the head amplifier and to prevent distortion in the reproduced signals while decreasing the number of externally provided parts and the number of pins when the device is realized in the form of an IC.For this purpose, the head amplifier is comprised of amplifier means for amplifying the reproduced signals, differential amplifier means for receiving the output of the amplifier means and a reference voltage, and means for comparing the output of said amplifier means with a reference voltage, and wherein the output of the comparator means is fed back to said amplifier means in order to eliminate the offset between the two inputs of the differential amplifier means.

公开(公告)号：WO1995013607A1

公开(公告)日：1995-05-18

申请号：PCT/US1994012931

申请日：1994-11-10

Applicant: EXABYTE CORPORATION

Inventor： EXABYTE CORPORATION ,  MILES, Robert, J. ,  ZWEIGHAFT, James

IPC: G11B05/027

CPC classification number: G11B15/087 ,  G11B5/0086 ,  G11B15/32 ,  G11B15/43 ,  G11B15/50 ,  G11B15/52 ,  G11B15/6656

Abstract: A capstanless helical scan recording system includes a supply reel shaft (54); a take-up reel shaft (56); and a media transport path extending from a supply reel to a take-up reel. The take-up reel comprises a rotor assembly (60), a rotating hub assembly (70), and a gearing system. The rotor assembly includes a sun gear (80) which rotates at a first rotational speed. The rotating hub assembly carries three planetary gears (160) and imparts a velocity to media transported in the media transport path. The gearing system meshes with the rotor assembly and with the hub assembly for causing the hub assembly to have a greater rotational speed than the rotor assembly.

Abstract translation: 无绞盘螺旋扫描记录系统包括供带盘轴（54）; 收卷卷轴（56）; 以及从供应卷轴延伸到卷取卷轴的介质传送路径。 卷取卷轴包括转子组件（60），旋转轮毂组件（70）和传动系统。 转子组件包括以第一转速旋转的太阳齿轮（80）。 旋转轮毂组件承载三个行星齿轮（160）并且向媒体传送路径中传送的介质赋予速度。 齿轮系统与转子组件和轮毂组件啮合，以使轮毂组件具有比转子组件更大的旋转速度。

公开(公告)号：WO1993001591A1

公开(公告)日：1993-01-21

申请号：PCT/US1991004873

申请日：1991-07-09

Applicant: BALLARD, Clinton

IPC: G11B05/027

CPC classification number: G06J1/00 ,  G11B20/10527 ,  G11B20/1833 ,  H03M5/22

Abstract: A method and apparatus for error detection and correction in the storage and retrieval of digital data on magnetic storage systems includes forming and storing a set of reference waveforms (... Wn-1, Wn, Wn+1, ...) having assigned reference identifier values, converting the digital data into a stream of reference identifiers, multiplexing (30) the reference waveforms with the stream of reference identifiers and storing same as an analog data stream. On retrieval, the reference waveforms are retrieved, and the analog data stream is sampled by an analog to digital converter (48), and compared and matched to the reference waveforms by a CPU (14) to produce reference identifiers output as an output stream (52).

Abstract translation: 用于在磁存储系统上数字数据的存储和检索中的错误检测和校正的方法和装置包括形成并存储一组参考波形（... Wn-1，Wn，Wn + 1，...） 参考标识符值，将数字数据转换成参考标识符流，将参考波形与参考标识符流复用（30）并将其存储为模拟数据流。 在检索时，检索参考波形，模拟数据流由模数转换器（48）采样，并通过CPU（14）与参考波形进行比较和匹配，以产生作为输出流输出的参考标识符（ 52）。

公开(公告)号：WO1992010831A1

公开(公告)日：1992-06-25

申请号：PCT/US1991008007

申请日：1991-10-23

Applicant: STORAGE TECHNOLOGY CORPORATION

Inventor： STORAGE TECHNOLOGY CORPORATION ,  LEONHARDT, Michael, Lawrence ,  MILLIGAN, Charles, Allen

IPC: G11B05/027

CPC classification number: G11B15/67 ,  G11B15/66 ,  G11B15/6656 ,  G11B25/066

Abstract: This system makes use of a tape cassette helical scan tape transport (415-421) and 3480-type magnetic tape cartridge (401) as the data storage media. The merging of these two incompatible elements is accomplished by the use of a novel interface that implements a 'virtual tape cassette' using a tape cartridge (401) in a manner that makes this media compatible with the tape transport (415-421). The virtual tape cassette is implemented by providing a takeup reel (402) positioned with the magnetic tape cartridge (401) in a relationship that substantially matches the format of a magnetic tape cassette. A short tape threading arm (403) is used to retrieve the leader block (311) from the tape cartridge (401) and thread the magnetic tape (424) over a short tape threading path (423) to the takeup reel (402). Once the tape (424) is affixed to the takeup reel (402), the helical scan tape guide arms (415, 419) transport the length of tape (424) that is now exposed between the tape cartridge (401) and the takeup reel (402) to the rotary heads (416).

公开(公告)号：WO1990014658A1

公开(公告)日：1990-11-29

申请号：PCT/US1990002807

申请日：1990-05-18

Applicant: BUMB, Frank, C.

IPC: G11B05/027

CPC classification number: G11B15/61 ,  G11B15/671

Abstract: A tape transport includes a deck, and magnetic tape supply and take-up reels (10, 30) associated with the deck for rotation to transport magnetic tape (14) along a predetermined path (18) therebetween; rotary head structure (44) disposed along the path (18) and associated with the deck, for interaction with the tape (14); a rotary capstan (22) carried by the deck to engage and advance the tape (14) along its path (18); there being an air flow channel (36) along the path (18) for channeling air (36a) to flow adjacent the tape (14) and from the supply reel (10) to the take-up reel (30) to assist tape (14) travel to the take-up reel (30). A rotary apparatus (12a) rotatably supports and rotates the take-up reel (30), and is ported to receive and discharge air flow (36a) from the channel (36).

公开(公告)号：WO1980001015A1

公开(公告)日：1980-05-15

申请号：PCT/JP1979000278

申请日：1979-10-31

Applicant: SHINANO KIKAKU CO LTD

Inventor： SHINANO KIKAKU CO LTD ,  WATANABE K ,  YOSHINARI T

IPC: G11B05/027

CPC classification number: G11B19/02 ,  G09B5/062 ,  G11B15/14

Abstract: Magnetic reproducer which uses a magnetic sheet having four circular coaxial magnetic tracks for recording visible information independently divided into four divisions on the front surface thereof and four circular coaxial magnetic tracks for recording voice information relative to the visible information on the back surface thereof. This magnetic reproducer consists of a plurality of preamplifiers (PA) each having a photodetector (PT) and connected respectively to four reproducing heads (H) moving on the respective magnetic tracks to be movable integrally with the respective heads (H), sliding contacts (SR) for connecting these preamplifiers (PA) to one main amplifier (MA), a plurality of light-emitting elements (LED) energized upon operation of four reproduction switches (TS) installed corresponding to the respective items of visible information to face the respective photodetectors (PT), and four energization inhibiting circuits connected to the respective light-emitting elements (LED) and connected to each other. When only the light-emitting element (LED) corresponding to the initially operated reproduction switch (TS) of the four reproduction switches (TS) is energized to allow the photodetector (PT) corresponding thereto to receive the light therefrom, the preamplifier (PA) corresponding thereto is operated.

Abstract translation: 磁性再现器使用具有四个圆形同轴磁道的磁性片，用于在其前表面上独立地分成四个分隔的可视信息，以及四个圆形同轴磁道，用于相对于其后表面上的可视信息记录语音信息。 该磁性再现器由多个前置放大器（PA）组成，每个前置放大器具有光电检测器（PT），并分别连接到在相应的磁道上移动的四个再现磁头（H），以与各个磁头（H），滑动触点 SR），用于将这些前置放大器（PA）连接到一个主放大器（MA），多个发光元件（LED）在操作四个再现开关（TS）时被激活，所述四个再现开关（TS）安装对应于相应的可见信息项面对相应的 光电检测器（PT）和连接到各个发光元件（LED）并且彼此连接的四个通电抑制电路。 当仅对应于四个再现开关（TS）的初始操作的再现开关（TS）的发光元件（LED）通电以允许与其对应的光电检测器（PT）从其接收光时，前置放大器（PA） 对应的操作。