Selection of amplifier for optimized charge transfer in active pixel CMOS time of flight (TOF) image sensors

Izhal Abdul Halin; Amad ud Din; Ishaq b. Aris; Maryam bt. Mohd Isa; Suhaidi Shafie; Shoji Kawahito

doi:10.1587/elex.8.1913

LETTER

Selection of amplifier for optimized charge transfer in active pixel CMOS time of flight (TOF) image sensors

Izhal Abdul Halin, Amad ud Din, Ishaq b. Aris, Maryam bt. Mohd Isa, Suhaidi Shafie, Shoji Kawahito

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Keywords: Time-of-Flight (TOF), Charge Transfer Efficiency (CTE), CMOS Amplifiers, TOF Pixels, Cascode Amplifier

JOURNAL FREE ACCESS

2011 Volume 8 Issue 22 Pages 1913-1919

DOI https://doi.org/10.1587/elex.8.1913

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Abstract

Although CMOS Time-of-Flight Range Image Sensors have been recently realized, the fabrication process is modified by inserting an extra mask layer to allow efficient TOF dependent charge transfer. This work focuses on the selection procedure of amplifiers to be used in the design of the TOF pixel using the standard CMOS process. From our analysis, it is found that the Cascode amplifier is the best amplifier to be used when compared to three other amplifiers. Simulation results show that the Cascode amplifier has a Charge Transfer Efficiency of 95.08% and power dissipation of 1.32µW, which enables the same charge transfer mechanism required for TOF imaging.

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