Journal of Infrared and Millimeter Waves, Volume. 39, Issue 3, 324(2020)
A readout structure with double column buses and shared source follower for IRFPAs
Figures & Tables(11)
Fig. 1. Block diagram of the 640×512 conventional voltage readout mode readout circuit.
Fig. 2. Circuit diagram of the conventional voltage readout mode readout circuit.
Fig. 3. Block diagram of the pixel-level shared-SF and double column buses readout circuit.
Fig. 4. Circuit diagram of the pixel-level shared-SF and double column buses readout circuit.
Fig. 5. Simulation results of the output deviation of the conventional and the proposed structure
Fig. 6. Monte-Carlo simulation results of the conventional and the proposed structure
Fig. 8. Test results of the readout circuit in IWR mode: (a) noise, (b) nonlinearity
Table 1. Comparison of the nonlinearity and non-uniformity between the conventional and the proposed structure
View tableView in ArticleTable 1. Comparison of the nonlinearity and non-uniformity between the conventional and the proposed structure
Structure Nonlinearity
(Parasitic Resistor)
Non-uniformity
(Parasitic Resistor)
Non-uniformity
(Process Fluctuation)
conventional structure 2.78% 2.5% 1.67% proposed structure 0.27% <0.1% <0.6%
Table 2. Comparison of the performance parameters of readout circuits
View tableView in ArticleTable 2. Comparison of the performance parameters of readout circuits
Parameters [23] [11] [20] This work Pixel size 15 μm×15 μm 15 μm×15 μm 7.5 μm×7.5 μm 15 μm×15 μm Array size 640×512 640×512 640×512 640×512 Process N/A 0.35μm CMOS 0.18μm CMOS 0.35μm CMOS Power 50 mW 60 mW N/A 30 mW Charge handling capacity 5.0 Me- 6.6 Me- 3.1 Me- 7.0 Me- NETD 25 mK 20 mK 25.5 mK 18 mK Frame frequency 100 Hz 100 Hz 100 Hz 120 Hz
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Yu-Ze NIU, Ya-Jun ZHU, Wen-Gao LU, Yu-Ting GU, Ya-Cong ZHANG, Zhong-Jian CHEN. A readout structure with double column buses and shared source follower for IRFPAs[J]. Journal of Infrared and Millimeter Waves, 2020, 39(3): 324
Paper Information
Category: Photoelectric Technology and Application
Received: Nov. 21, 2019
Accepted: --
Published Online: Jul. 7, 2020
The Author Email: Wen-Gao LU (zhangyc@pku.edu.cn)
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