Patent ID: 6702755
Filing Date: 2004-03-09
Classification: A61B

Abstract:
An adapter for interfacing a pyro/piezo sensor to a PSG machine comprising:(a) an input amplifier having a pair of input terminals adapted to be coupled to said pyro/piezo sensor, an output terminal and a predetermined gain factor by which a sensor output signal is amplified; (b) a filter circuit connected to the output terminal of the differential input amplifier for separating a pyro component of the sensor output signal from a piezo component of the sensor output signal; (c) a dead band circuit coupled to an output of the filter circuit for removing baseline noise from the piezo component of the sensor output signal; (d) an output driver circuit coupled to an output of the dead band circuit adapted to provide a differential output signal to a PSG machine; and (e) the filter circuit adapted to provide the pyro component of the sensor output signal to the PSG machine.