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Pressure sensor with increased sensitivity for use with an implantable medical device

  • US 6,171,252 B1
  • Filed: 04/29/1999
  • Issued: 01/09/2001
  • Est. Priority Date: 04/29/1999
  • Status: Expired due to Fees
First Claim
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1. A method of obtaining pressure data of a body fluid using a pressure sensor, the pressure sensor comprising a measurement capacitor responsive to changes in body fluid pressure, the method comprising:

  • charging, during a first charge period of an integration cycle, the measurement capacitor at a first charge rate;

    charging, during a second charge period of the integration cycle, the measurement capacitor at a second charge rate; and

    producing, using the length of the first charge period and the second charge period of the measurement capacitor, a signal indicative of a pressure change of the body fluid imparted to the measurement capacitor.

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