| Song Qiwei (宋奇伟),Mao Luhong,Xie Sheng,Zhang Shilin.[J].高技术通讯(英文),2015,21(1):90~95 |
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| Realization of a tunable analog predistorter using parallel combination technique for laser driver applications |
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| DOI：10.3772/j.issn.1006-6748.2015.01.013 |
| 中文关键词: |
| 英文关键词: radio-over-fiber (RoF), nonlinear, analog predistorter, parallel combination, MOS transistor |
| 基金项目: |
| Author Name | Affiliation | | Song Qiwei (宋奇伟) | | | Mao Luhong | | | Xie Sheng | | | Zhang Shilin | |
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| 中文摘要: |
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| 英文摘要: |
| This paper describes a new approach for designing analog predistorters that can compensate for the nonlinear distortion of laser drivers in a radio-over-fiber (RoF) system. In contrast to previous works, this paper analyzes the transfer characteristics of CMOS transistors, by combining parallel currents of CMOS transistors in various W/L and negative bias voltages to realize the tunable analog predistortion function. The circuit is fabricated by a standard 0.18μm CMOS technology. The core circuit current consumption is only 15mA and the entire driver circuit works in a band-pass from 1~2.2GHz. Experimental results of two-tone tests have shown that with an analog predistortoer the IIP3 of the laser driver circuit has an improvement of 4.91dB. |
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