A Simple Thermal and Electrical Model of an Infrared Pyroelectric Detector Using Spice

This paper shows a complete description of a simple infrared pyroelectric detector model, using SPICE. Both thermal and electrical properties of the detector model have been implemented in order to simulate the detector response versus time and frequency for any radiation stimulus. The detector model has been designed to obtain Ý v and NEP. The effect of the material properties of the detector on its response has been studied. The parameters of the proposed model may be adjusted to the experimental response of the detector, although not all of its properties are known. From this adjustment a good approximation of those unknown properties is deduced. Good agreement has been found between simulated and measured results.