SIGNAL CONDITIONING DEVICE FOR INTERFACING INTRAVASCULAR SENSORS

摘要

A signal conditioning device (50) interfaces a variety of sensors (60), such as guide wire-mounted pressure sensors, to physiology monitors (52). The signal conditioning device (50) includes a processor for controlling sensor excitation and signal conditioning circuitry within the signal conditioning device (50). The processor also supplies signals to an output stage on the signal conditioning device (50) representative of processed sensor signals received by a sensor interface of the signal conditioning device (50). Power for the signal conditioning device processor is supplied by an excitation signal received from a physiology monitor (52) that drives the output stage. In addition, a temperature compensating current source provides an adjustment current to at least one of a pair of resistive sensor elements (61,62) to compensate for differences between temperature change upon the sensor elements (61, 62), thereby facilitating temperature effects upon the sensor elements (61, 62).