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Acoustic-surface-wave recirculating memory

Acoustic-surface-wave recirculating memory

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An acoustic-surface-wave memory is described, operating at a bit rate of 220 MHz and storage capacity of 1280 bit per recirculation loop. The transducers are coded using orthogonal pairs of Golay complementary sequences to obtain pulse-in pulse-out behaviour. The recirculation electronics uses standard commercial logic for both the amplifier and the WRITE, READ, INHIBIT and RECLOCKING functions.

References

    1. 1)
      • J.M. Speiser , H.J. Whitehouse . (1971) Surface wave transducer array using transversal filter concept, Acoustic surface wave and acousto-optic devices.
    2. 2)
      • C.C. Tseng . Signal multiplexing in surface-wave delay lines using orthogonal pairs of Golay's complementary sequences. IEEE Trans.
    3. 3)
      • G.L. Heiter . 100 MHz 1000-bit ultrasonic digital delay-line time-compression store. IEEE J. Solid-State Circuits
    4. 4)
      • Shaw, H.J.: `Long time delays with surface waves', Presented at the ultrasonics symposium, 1971, Miami Beach, Fla., USA.
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