DocumentCode :
1412484
Title :
A Transimpedance Amplifier With a Tunable Bandwidth in 0.18- \\mu{\\hbox {m}} CMOS
Author :
Chien, Chih-Kang ; Hsieh, Hsieh-Hung ; Chen, Huan-Sheng ; Lu, Liang-Hung
Volume :
58
Issue :
3
fYear :
2010
fDate :
3/1/2010 12:00:00 AM
Firstpage :
498
Lastpage :
505
Abstract :
In this paper, a transimpedance amplifier (TIA) with a tunable 3-dB bandwidth is presented for optical communications. The proposed TIA is composed of two cascaded stages in which an input network with inductive peaking elements is employed in the first stage for broadband operations while a modified distributed amplifier is utilized as the second stage for enhanced transimpedance gain. In addition, a feedback loop is incorporated as the bandwidth-tuning mechanism. By tuning the bandwidth of the TIA, optimum circuit operation with lowest bit error rate (BER) can be achieved in the receiver frontend for high-speed data transmission. The proposed circuit is implemented in a 0.18-μm CMOS process. Consuming a dc power of 33.3 mW forms a 1.8-V supply, the fabricated TIA exhibits a transimpedance gain of 47.8 dB??Ω and a variable 3-dB bandwidth from 6.2 to 10.5 GHz. Provided a 211 -1 pseudorandom bit sequence at 9-15 Gb/s, a BER less than 10-12 is demonstrated experimentally by the TIA with the bandwidth tuning mechanism.
Keywords :
CMOS analogue integrated circuits; circuit optimisation; circuit tuning; operational amplifiers; optical receivers; random sequences; CMOS process; bandwidth tuning mechanism; bit rate 9 Gbit/s to 15 Gbit/s; distributed amplifier; feedback loop; frequency 6.2 GHz to 10.5 GHz; high speed data transmission; inductive peaking element; optical communication; optimum circuit operation; power 33.3 mW; pseudorandom bit sequence; receiver frontend; size 0.18 μm; transimpedance amplifier; voltage 1.8 V; Bandwidth-tuning technique; bit error rate (BER); distributed amplifier stage; fiber-optical communications; intersymbol interference (ISI); transimpedance amplifiers (TIAs);
fLanguage :
English
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9480
Type :
jour
DOI :
10.1109/TMTT.2010.2040328
Filename :
5409503
Link To Document :
بازگشت