NASA NTRS · 19710029545
A wide-range linear beat-by-beat cardiotachometer
Abstract
Linear beat by beat cardiotachometer, describing amplifier design and operation
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Caldwell, W. M., Smith, L. D., Wilson, M. F.. 1970-03-01. A wide-range linear beat-by-beat cardiotachometer. https://ntrs.nasa.gov/citations/19710029545
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