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DIGITAL CAPACITANCE METER BY MEASURING CAPACITOR DISCHARGE TIME

  • US 3,581,196 A
  • Filed: 10/28/1968
  • Issued: 05/25/1971
  • Est. Priority Date: 10/28/1968
  • Status: Expired due to Term
First Claim
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1. A digital capacitance meter comprising:

  • means for charging an unknown capacitor to a known voltage;

    means including a constant current source for discharging said capacitor from said known voltage to a predetermined voltage lower than said known voltage at a constant predetermined rate;

    means for determining the interval of time required for said discharge to occur; and

    means for producing a numerical representation of said interval of time.

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