2 Hybrid thin-film ferroelectric detector with pixel level ADC
Joseph Acquaviva, Arif Ahmed, William Jan, Chien‐Hung Wu, Joshua Ziff, Howard R. Beratan · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2009
Pyroelectric devices require a change in temperature in order to generate a useful signal. For this reason, Thin Film Ferroelectric (TFFE) sensors require a chopping system to modulate the incident thermal radiation. This chopping or modulation process translates the signal of interest from DC to the chopping frequency, enabling the use of filtering techniques to minimize the effects of 1/f noise.