A 765 mW high-voltage switching ADSL line-driver

被引：6
|
作者：
De Gezelle, V [1 ]
Doutreloigne, J [1 ]
Van Calster, A [1 ]
机构：
[1] State Univ Ghent, ELIS TFCG IMEC, B-9052 Zwijnaarde, Belgium
来源：
SOLID-STATE ELECTRONICS | 2005年 / 49卷 / 12期
关键词：
high-voltage CMOS integrated circuits; ADSL line-driver; switching amplifiers; power amplifiers; asynchronous amplifiers; pulse width modulation;
D O I：
10.1016/j.sse.2005.08.006
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：
With the increasing popularity of ADSL-modems, there is a stringent need to develop highly efficient line-drivers. Currently most line-drivers use linear amplifiers, such as class AB. Due to the nature of the DMT-encoded signal, the efficiency of such amplifiers is limited. Another issue is the transformer turns ratio and the resulting supply voltage of the amplifier. In general, a high-voltage supply is needed. In this paper, a high-voltage switching differential amplifier using a 50 V supply is described. The maximum efficiency into a matched load yields over 40%, with an efficiency of 13.1% for a full downstream signal while maintaining a minimum MTPR of 40 dB. The circuit is processed in a 100 V 0.7 mu m technology. (C) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1947 / 1950
页数：4
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