MEDICAL SENSOR WITH AMPLITUDE INDEPENDENT OUTPUT

摘要

The present invention provides a medical sensor for detecting a blood charac teristic. The sensor includes a transducer for producin g an analog signal related to the blood characteristic. The analog signal is con verted into a transmission signal which is in amplitude- independent form for transmission to a remote analyzer. In one embodiment, a current-to -frequency converter converts a signal from a pulse oxim eter sensor into a frequency signal which can be transmitted over a transmission line to a remote pulse oximeter.