Design of pyroelectric IR readout circuit based on LiTaO/sub 3/ detectors

This paper presents a design approach of pyroelectric readout circuit based on LiTaO/sub 3/ material for thermal imaging applications. To simulate the integrated effects of the pyroelectric detector and the sense amplifier readout circuit, the macro models of LiTaO/sub 3/-based pyroelectric detectors have been developed and verified by using the HSPICE simulator. Both computer simulation and hybrid-mode hardware realization of the pyroelectric readout circuit cell have been investigated in regard to voltage responsivity, noise analysis and specific detectivity. Good agreement has been found between computer simulation and measured performance on the voltage responsivity and noise effect.