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Medical cable including authentication circuit

  • US 9,300,356 B2
  • Filed: 10/14/2014
  • Issued: 03/29/2016
  • Est. Priority Date: 04/16/2012
  • Status: Active Grant
First Claim
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1. A medical cable for transmitting data between a patient monitor and a sensor, the medical cable comprising:

  • a cable body;

    a first connector connected to the cable body and configured to be coupled to a patient monitor;

    a second connector connected to the cable body, the second connector configured to be coupled to a sensor and to receive a sensor signal from the sensor that comprises information related to the one or more physiological parameters; and

    an authentication circuit, configured to receive a test signal from the patient monitor and generate an output ramp signal responsive to the test signal that reaches a target voltage within an amount of time expected by the patient monitor, thereby enabling the monitor to authenticate the medical cable,wherein the second connector comprises a portion of an electrically conductive path in series with a switch, the conductive path configured to transmit the test signal from the patient monitor to the authentication circuit, said second connector configured to close the switch in response to being coupled to the sensor.

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