A low-power CMOS trans-impedance amplifier for FM/cw ladar imaging system

Kai Hu; Yi-qiang Zhao; Yun Sheng; Hong-liang Zhao; Hai-xia Yu

doi:10.1117/12.2034996

19 September 2013 A low-power CMOS trans-impedance amplifier for FM/cw ladar imaging system

Kai Hu, Yi-qiang Zhao, Yun Sheng, Hong-liang Zhao, Hai-xia Yu

Proceedings Volume 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications; 89052K (2013) https://doi.org/10.1117/12.2034996
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

A scannerless ladar imaging system based on a unique frequency modulation/continuous wave (FM/cw) technique is able to entirely capture the target environment, using a focal plane array to construct a 3D picture of the target. This paper presents a low power trans-impedance amplifier (TIA) designed and implemented by 0.18 μm CMOS technology, which is used in the FM/cw imaging ladar with a 64×64 metal-semiconductor-metal(MSM) self-mixing detector array. The input stage of the operational amplifier (op amp) in TIA is realized with folded cascade structure to achieve large open loop gain and low offset. The simulation and test results of TIA with MSM detectors indicate that the single-end trans-impedance gain is beyond 100 kΩ, and the -3 dB bandwidth of Op Amp is beyond 60 MHz. The input common mode voltage ranges from 0.2 V to 1.5 V, and the power dissipation is reduced to 1.8 mW with a supply voltage of 3.3 V. The performance test results show that the TIA is a candidate for preamplifier of the read-out integrated circuit (ROIC) in the FM/cw scannerless ladar imaging system.

Citation Download Citation

Kai Hu, Yi-qiang Zhao, Yun Sheng, Hong-liang Zhao, and Hai-xia Yu "A low-power CMOS trans-impedance amplifier for FM/cw ladar imaging system", Proc. SPIE 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications, 89052K (19 September 2013); https://doi.org/10.1117/12.2034996

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