ANALYTE MONITORING SYSTEM HAVING BACK-UP POWER SOURCE FOR USE IN EITHER TRANSPORT OF THE SYSTEM OR PRIMARY POWER LOSS

摘要

An analyte monitoring system includes a biosensor (10) for detecting an analyte concentration in blood. The monitoring system includes first and second power sources (22, 26), each selectively couplable to the biosensor for providing power to the biosensors. A sensor is associated with the first power source and senses the output thereof. A selector (24) is coupled to both the first and second power sources and the biosensor, such that it may selectively couple an output or outputs of either the first or second power sources to the biosensor. In operation, the first power source (22) is coupled to the biosensor to thereby bias the sensor. If the sensor indicates that the first power source (22) is not providing power to the biosensor, the selector (24) decouples the first power source from the biosensor and couples the second power (26) source to the biosensor to thereby maintain the biosensor in a biased state.