基于LPC901FD的ADSL宽带线路加速延伸器研制

Development of ADSL Broadband Circuit Extend Accelerator Based on LPC901FD

鉴于目前ADSL因选线率低、无法接入而严重制约其大规模推广的现状,提出设计宽带线路ADSL延伸器以延长ADSL的安装距离,提升宽带速度。采用LPC901FD微处理器控制,取电话线路自身48V馈电,经DC-DC功率转换提供能量,无需外接电源,安装维护方便。实践表明,该产品能有效解决经常掉线问题,提升宽带速度并延伸安装距离,保证了传输质量。

Due to the low efficiency in net-choosing as well as difficulty in accessing of ADSL, the Broadband Circuit Extend Accelerator （BCEA） objected to extend the amounting distance of ADSL and further improving the broadband transmission rate was designed. Based on the Microchip LPC901FD, getting the voltage from the telephone circuit itself, and then through the power transform DC-DC, all that make the BCEA proposed in this paper that is without external power, the ability of anti-interference and anti-line-hanging is strengthened and the downstream and the upstream of ADSL is of high Signal to Noise Katio （SNK） and low voltage .The application demonstrates that the proposed BCEA is good in accelerating broadband rate and extending the transmission distance and is of high transmission quality.