Modeling for infrared readout integrated circuit based on Verilog-A

Xiao Wang; Zelin Shi

doi:10.1117/12.2180101

13 April 2015 Modeling for infrared readout integrated circuit based on Verilog-A

Xiao Wang, Zelin Shi

Proceedings Volume 9522, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics 2014, Part II; 95221M (2015) https://doi.org/10.1117/12.2180101
Event: Selected Proceedings of the Photoelectronic Technology Committee Conferences held August-October 2014, 2014, China, China

Abstract

Infrared detectors are the core of infrared imaging systems, while readout integrated circuits are the key components of detectors. In order to grasp the performance of circuits quickly and accurately, a method of circuit modeling using Verilog-A language is proposed, which present a behavioral simulation model for the ROIC. At first, a typical capacitor trans-impedance amplifier(CTIA) ROIC unit is showed, then the two essential parts of it,operational amplifier and switch are modeled on behavioral level. The op amp model concludes these non-ideal factors, such as finite gain-bandwidth product, input and output offset, output resistance and so on. Non-deal factors that affect switches are considered in the switch behavioral model, such as rise and fall time, on-resistance and so on. At last time-domain modeling method for noise is presented, which is compared with the classical frequency domain method for difference. The analysis results shows that in the situation that noise interested bandwidth(NIBW) is more than 5MHz, the difference between the two methods leads to less than 1% if the sample rate of noise is larger 4 times of the NIBW

Citation Download Citation

Xiao Wang and Zelin Shi "Modeling for infrared readout integrated circuit based on Verilog-A", Proc. SPIE 9522, Selected Papers from Conferences of the Photoelectronic Technology Committee of the Chinese Society of Astronautics 2014, Part II, 95221M (13 April 2015); https://doi.org/10.1117/12.2180101

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KEYWORDS

Readout integrated circuits

Switches

Performance modeling

Systems modeling

Amplifiers

Circuit switching

Thermal modeling

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