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    2.
    发明专利
    未知

    公开(公告)号：DE2541770A1

    公开(公告)日：1976-07-15

    申请号：DE2541770

    申请日：1975-09-19

    Applicant: IBM

    Inventor： STELZENMULLER WILLIAM KARL ,  WALKER ERNEST LEE

    IPC: H03H9/64 ,  H04J1/00 ,  H04J11/00 ,  H04J99/00 ,  H04L5/00

    Abstract: An acoustical wave filter is formed by depositing a pattern of interdigitated conductors which form a coding arrangement on a piezeoelectric crystal. Multiplex communication through the crystal is achieved by depositing input filters of differing configuration on the crystals, which separate channels by autocorrelation of a pulse code. A single output filter is provided to respond to the waves set up in the crystal by the input filters to transmit these waves to a single common conductor. Demultiplex is similarly done on a second crystal.

    DATA STORES
    3.
    发明专利
    DATA STORES 未知

    公开(公告)号：AU3930572A

    公开(公告)日：1973-08-30

    申请号：AU3930572

    申请日：1972-02-23

    Applicant: IBM

    Inventor： BEAUSOLEIL WILLIAM FRANCIS ,  BROWN DAVID TRENT ,  WALKER ERNEST LEE

    IPC: G06F7/78 ,  G11C19/08 ,  G11C19/00 ,  H03K23/24 ,  G11C11/14

    Abstract: This specification discloses a bubble domain memory in which data is arranged for immediacy of access in accordance with its last use. The memory comprises a plurality of parallel shift registers in which data can be accessed in parallel. In other words, each of the shift registers contains a bit of a page or word so that by the performance of one shifting operation all of the bits of the page or word can be accessed. Data in each shift register is arranged in its order of last use so that the access position K of a shift register having K bit positions contains the last bit of information used and the position K-1 preceding the access position K in the shift register contains the bit of data used just previously to the data in the access position K and so on. In these shift registers the shift positions are arranged in loops for shifting the data between the positions of the shift register. Two such loops are provided, one of the loops contains all the shift positions so that data in any position in the shift register can be shifted into the access position K of the register for reading or writing. The other loop contains all the positions of the shift register but the access position K. This second loop is for reordering the data in the shift register in order of last use after data has been shifted into the access position K for reading or writing by the first loop.

    5.
    发明专利
    未知

    公开(公告)号：DE2333749A1

    公开(公告)日：1974-07-04

    申请号：DE2333749

    申请日：1973-07-03

    Applicant: IBM

    Inventor： BEAUSOLEIL WILLIAM FRANCIS ,  KEEFE GEORGE EDWARD ,  WALKER ERNEST LEE

    IPC: G11C11/14 ,  G01R33/09 ,  G11C19/08 ,  G11C21/00

    Abstract: A plurality of magneto-resistive sensing elements are connected in series and positioned adjacent magnetic bubble domain propagation paths in a compressor circuit. If a data representing bubble is injected into the beginning of the circuit, each bubble already present is forced over to the next idler position. As the bubbles pass the sensing elements their magnetization vectors are rotated producing corresponding changes in the resistance values of the sensors, which may be easily detected as a large magnitude signal indicating the presence of a data bubble.

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