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Signal processing circuit

  • US 3,897,774 A
  • Filed: 01/28/1974
  • Issued: 08/05/1975
  • Est. Priority Date: 01/28/1974
  • Status: Expired due to Term
First Claim
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1. A signal processing circuit for use in conjunction with a data collection system wherein an analog input signal is sampled at periodic spaced time intervals and applied to an analog-todigital converter to develop a digital output signal for causing said system to respond to a transient pulse appearing in said analog input signal between said periodic samplings, said signal processing circuit comprising, in combination:

  • pulse discrimination means for producing a control signal in response to the occurrence of said transient pulse; and

    means including an amplitude hold circuit responsive to said control signal for maintaining the instantaneous level of said analog input signal as applied to said analog-to-digital converter constant for a predetermined hold period following the occurrence of said transient pulse such that the amplitude of said pulse is sampled by said converter and converted to a corresponding digital output signal.

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