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W.-Z. Chen, S.-H. Huang, G.-W. Wu, C.-C. Liu, Y.-T. Huang, C.-F. Chiu, W.-H. Chang and Y.-Z. Juang, “A 3.125 Gbps CMOS Fully Integrated Optical Receiver with Adaptive Analog Equalizer,” Proceedings of IEEE Asian Solid-State Circuits Conference, Jeju, 12-14 November 2007, pp. 396-399. doi:10.1109/ASSCC.2007.4425714

has been cited by the following article:

• TITLE: Fully On-Chip Integrated Photodetector Front-End Dedicated to Real-Time Portable Optical Brain Imaging

  AUTHORS: Ehsan Kamrani, Frederic Lesage, Mohamad Sawan

  KEYWORDS: Biochip; Analog CMOS Integrated Circuit; Trans-Impedance Amplifier; fNIRS; Brain Imaging; Medical Imaging; Optical Sensors

  JOURNAL NAME: Optics and Photonics Journal, Vol.2 No.4, December 28, 2012

  ABSTRACT: Optical brain imaging using functional near infra-red spectroscopy (fNIRS) offers a portable and noninvasive tool for monitoring of blood oxygenation. In this paper we have introduced a new miniaturized photodetector front-end on achip to be applied in a portable fNIRS system. It includes silicon avalanche photodiodes (SiAPD), Transimpedance amplifier (TIA) front-end and Quench-Reset circuitry to operate in both linear and Geiger modes. So it can be applied for both continuous-wave fNIRS (CW-fNIRS) and also single-photon counting. Proposed SiAPD exhibits high-avalanche gain (>100), low-breakdown voltage ( V) and high photon detection efficiency accompanying with low dark count rates. The proposed TIA front-end offer a low power consumption ( mW), high-transimpedance gain (up to 250 MV/A), tunable bandwidth (1 kHz - 1 GHz) and very low input and output noise (~few fA/√Hz and few μV/√Hz). The Geiger-mode photon counting front-end also exhibits a controllable hold-off and rest time with an ultra fast quench-reset time (few ns). This integrated system has been implemented using submicron (0.35 μm) standard CMOS technology.