Title :
An integrated multi-channel optical sensor receiver with considerations of channel-isolation for digital output
Author :
Huang Xiaozong ; Huang Wengang ; Liu Lintao ; Shi Jiangang ; Zhong Yingjun
Author_Institution :
Analog IC Design Center, SISC, Chongqing, China
fDate :
Oct. 29 2012-Nov. 1 2012
Abstract :
In this paper, a low power, high density and fully integrated CMOS receiver front-end with digital output for optical signal processing systems is presented. The circuit is composed of transimpedance amplifier for weak optical current detection, limiting amplifier for both linear and limiting amplifications, control circuits and the digital output interface. The front-end is powered by a single 3.3V power supply with the power supply current of 12mA. Measured with a photodiode, a sensitivity of 0.7μA was achieved. The channel isolation between 8 channels is considered during the period of circuit design, layout floor plan and measurement carefully. The digital output signal is compatible with TTL/CMOS logic interface which can reduce the size of system dramatically and is easy to use. The optical sensor receiver was fabricated with a commercial mixed-signal CMOS process with feature size of 0.6μm, taking silicon area of 1.91mm×1.01mm including bonding pads for 8 channels.
Keywords :
CMOS analogue integrated circuits; CMOS logic circuits; limiters; low-power electronics; mixed analogue-digital integrated circuits; operational amplifiers; optical receivers; optical sensors; optical signal detection; TTL/CMOS logic interface; bonding pad; channel isolation; circuit design; circuit layout floor plan; circuit measurement; control circuit; current 12 mA; digital output interface; digital output signal; fully integrated CMOS receiver front-end; high density CMOS receiver front-end; integrated multichannel optical sensor receiver; limiting amplifier; low power CMOS receiver front-end; mixed-signal CMOS process; optical signal processing system; photodiode; size 0.6 mum; transimpedance amplifier; voltage 3.3 V; weak optical current detection; CMOS integrated circuits; Current measurement; Limiting; Optical receivers; Optical sensors; Power supplies;
Conference_Titel :
Solid-State and Integrated Circuit Technology (ICSICT), 2012 IEEE 11th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-1-4673-2474-8
DOI :
10.1109/ICSICT.2012.6466752
