×

Calibration apparatus for analog-to-digital converter

  • US 4,364,027 A
  • Filed: 02/09/1981
  • Issued: 12/14/1982
  • Est. Priority Date: 09/16/1980
  • Status: Expired due to Fees
First Claim
Patent Images

1. A calibration apparatus for an analog-to-digital converter, comprising:

  • circuit means for controlling the DC level and the amplitude of an input signal applied thereto, the output signal from said circuit means being applied to said analog-to-digital converter;

    reference signal generator means for generating first, second and third reference levels to be applied to said circuit means, said first reference level being intermediate said second and third reference levels; and

    control means for controlling said circuit means in such a manner that the DC level of the output signal thereof is responsive to a digitized output from said analog-to-digital converter when the first reference level is applied to said circuit means, and that the amplitude of the output signal thereof is responsive to the difference between digitized outputs from said analog-to-digital converter when the second and third reference levels are applied to said circuit means.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×