半导体学报（英文版）2012，Vol.33Issue(8)：97-101,5.DOI:10.1088/1674-4926/33/8/085003
A 10-Gb/s inductor-less variable gain amplifier with a linear-in-dB characteristic and DC-offset cancellation
A 10-Gb/s inductor-less variable gain amplifier with a linear-in-dB characteristic and DC-offset cancellation
Liu Chang 1Yan Yuepeng 1Goh Wang-Ling 2Xiong Yongzhong 3Zhang Lijun 1Mohammad Madihian3
作者信息
- 1. Institute of Microelectronics, Chinese Academy of Sciences, Beijing 100029, China
- 2. Nanyang Technological University, Singapore 639798, Singapore
- 3. Institute of Microelectronics, Singapore 117685, Singapore
- 折叠
摘要
Abstract
This paper presents a broadband inductor-less variable gain amplifier (VGA) with a linear-in-dB gain control characteristic and DC-offset cancellation.The proposed VGA is composed of a variable gain block,an exponential voltage generator,a DC-offset canceller with common-mode voltage correction,and a gain peaking block.To achieve the broad band and reduce the chip area,the gain peaking block employs an inductor-less gain peaking scheme to compensate the high frequency gain drop of the variable gain block and the DC-offset canceller.The VGA fabricated in 0.13μm SiGe BiCMOS technology achieves a 3-dB bandwidth of 7.5 GHz and a variable gain range from -10 to 30 dB.Due to the inductor-less design,the die area is only 0.53 × 0.27 mm2 which is the smallest among other similar reported works.At 10-Gb/s,the VGA consumes 50 mW power from a single 1.2 V supply and exhibits an output data jitter of less than 30 pspp.关键词
VGA/broad band/DC-offset cancellation/gain peakingKey words
VGA/broad band/DC-offset cancellation/gain peaking引用本文复制引用
Liu Chang,Yan Yuepeng,Goh Wang-Ling,Xiong Yongzhong,Zhang Lijun,Mohammad Madihian..A 10-Gb/s inductor-less variable gain amplifier with a linear-in-dB characteristic and DC-offset cancellation[J].半导体学报（英文版）,2012,33(8):97-101,5.
