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Use of dynamic RAM in a portable data recorder

Use of dynamic RAM in a portable data recorder

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A portable ECG recorder using dynamic RAM as the recording medium has been developed. In the Letter, the dynamic RAM interface hardware which includes three types of communication mode, that is to a PC, a microcontroller (MCS-51) and an A/D subsystem (AD7821) with dynamic RAMs, is described. This technique opens a new path to the deveopment of low cost, small size and large capacity long-term physiological data recorders.

References

    1. 1)
      • N.V. Thakor , J.G.W. Webster , J. Tompkins . Design, implementation and evaluation of a microcomputer-based portable arrhythmia monitor. Med. Biol. Eng. Comput. , 151 - 159
    2. 2)
      • T. Tamura , T. Togawa . Desing of a multichannel solid-state recorder and its application to temperature measurement. Med. Biol. Eng. Comput. , 411 - 417
    3. 3)
      • D. Tepavac , J.R. Swenson , J. Stenehjem . Microcomputer-based portable long-term spasticity recording system. IEEE Trans. , 4 , 426 - 431
    4. 4)
      • ‘DRAM management handbook’ (National Semiconductor, 1988).
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