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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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© The Institution of Electrical Engineers
Published

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.

Inspec keywords: biomedical equipment; recorders; biomedical electronics; portable instruments; data recording; electrocardiography; DRAM chips; computer interfaces

Other keywords: PC; dynamic RAM; communication mode; portable data recorder; ECG recorder; physiological data recorders; microcontroller; A/D subsystem; MCS-51; dynamic RAM interface hardware

Subjects: Bioelectric signals; Display, recording and indicating instruments; Memory circuits; Biology and medical computing; Semiconductor storage; Data acquisition equipment and techniques; Peripheral interfaces

References

    1. 1)
      • T. Tamura , T. Togawa . Desing of a multichannel solid-state recorder and its application to temperature measurement. Med. Biol. Eng. Comput. , 411 - 417
    2. 2)
      • 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
    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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