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Real-time computerized engine analyzer using multiple analog-to-digital conversion system

  • US 5,481,193 A
  • Filed: 02/03/1992
  • Issued: 01/02/1996
  • Est. Priority Date: 02/03/1992
  • Status: Expired due to Term
First Claim
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1. An apparatus for monitoring waveforms of an internal combustion engine, comprising:

  • means for providing a periodic analog input waveform representative of operation of the internal combustion engine;

    first analog-to-digital converter means for converting the periodic analog waveform into a first digital signal representative of periodically sampled values of the periodic analog waveform sampled during a first portion of a sample period;

    second analog-to-digital converter means for converting the periodic analog waveform into a second digital signal representative of periodically sampled values of the periodic analog waveform sampled during a second portion of the sample period different than the first portion, wherein sampled values carried in the first digital signal are taken at different times than sampled values carried in the second digital signal; and

    means for storing the first digital signal and the second digital signal.

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