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    1.
    发明专利
    未知

    公开(公告)号：DE1259379B

    公开(公告)日：1968-01-25

    申请号：DEJ0025909

    申请日：1964-05-26

    Applicant: IBM

    Inventor： DODD PAUL D

    IPC: G11B20/10 ,  H03K5/01 ,  H03K5/04 ,  H03K5/153

    Abstract: 1,005,702. Electric analogue calculating. INTERNATIONAL BUSINESS MACHINES CORPORATION. May 21, 1964, No. 20946/64. Heading G4G. [Also in Division H3] In a pulse shaping circuit (see Division H3) a voltage is obtained which represents the quotient (peak amplitude)/ (area) of an input pulse. The peak amplitude signal 222 (Fig. 3) is obtained by differentiating the pulse and passing it to a zero crossing detector comprising in succession an overdriven amplifier, differentiator, bistable flip - flop, differentiator and single-shot multivibrator. A negative-going pulse thus occurs at the instant of the peak amplitude of the input pulse, and this negative pulse controls a " sample and hold " circuit fed with the input pulse to give a D.C. voltage representing the peak amplitude. The latter is divided by the integrated input pulse at 228, the output being applied to a further gated " sample and hold " circuit and squarer to give an output voltage of the required form at 238.

    3.
    发明专利
    未知

    公开(公告)号：FR2283505A1

    公开(公告)日：1976-03-26

    申请号：FR7521479

    申请日：1975-07-03

    Applicant: IBM

    Inventor： GRIFFITHS DONALD E ,  DODD PAUL D

    IPC: G11B5/55 ,  G11B5/82 ,  G11B17/02 ,  G11B17/30

    Abstract: A flexible disk file signal storage apparatus has a multiplicity of relatively thin, flexible disks of varying radii and arranged axially to facilitate radial disk selection. The radii pattern tends to minimize radii differences, thereby enhancing storage capacity. The flexible disks are arranged in axial groups of more than three disks with at least one disk in each group having a minimum radius with a pair of outer disks with a maximum radius plus at least one intermediate diameter disk. By interleaving alternate ones of said minimum radius disks between intermediate and maximum radius disks, radial selection access ports are maximized along an axial direction for a given radial difference between the maximum and minimum disk radii.

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