An oximeter sensor adapter which allows a sensor without a resistor in parallel with its LEDs to operate with an oximeter expecting such a resistor in parallel. The adapter includes LED drive electronics and appropriate oximeter drive current sensing circuitry for converting the drive signals from the...http://www.google.com.au/patents/US6571113?utm_source=gb-gplus-sharePatent US6571113 - Oximeter sensor adapter with coding element
