Noise of short-time integrators for readout of uncooled infrared bolometer arrays

[摘要] As state-of-the-art readout circuits short-time integrators in Far Infrared(FIR) uncooled bolometer arrays are commonly used. This paper compares thetransfer functions of an ideal continuous-time integrator with that of areal integrator with focus an OTA parameters and noise analysis. Beside thenoise sources at the non-inverting input of the OTA special care has to betaken to account for capacitances at the inverting input. The NoiseEquivalent Temperature Difference (NETD) as the key parameter for bolometerapplications for a real short-time integrator will be derived. As the resultit will be shown, that the NETD is 1/f-noise limited.

[学科分类] 电子、光学、磁材料