A Transimpedance Amplifier With a Tunable Bandwidth in 0.18-μm CMOS

被引：12

作者：

Chien, Chih-Kang ^{[1
,2
]}

Hsieh, Hsieh-Hung ^{[1
,2
]}

Chen, Huan-Sheng ^{[1
,2
]}

Lu, Liang-Hung ^{[1
,2
]}

机构：

[1] Natl Taiwan Univ, Dept Elect Engn, Taipei 10617, Taiwan

[2] Natl Taiwan Univ, Grad Inst Elect Engn, Taipei 10617, Taiwan

来源：

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES | 2010年 / 58卷 / 03期

关键词：

Bandwidth-tuning technique; bit error rate (BER); distributed amplifier stage; fiber-optical communications; intersymbol interference (ISI); transimpedance amplifiers (TIAs);

D O I：

10.1109/TMTT.2010.2040328

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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-mu m 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 . Omega and a variable 3-dB bandwidth from 6.2 to 10.5 GHz. Provided a 2(11) - 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.

引用

页码：498 / 505

页数：8

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