A new full CMOS 2.5 V two-stage line driver with variable gain for ADSL applications

Saeid Mehrmanesh,Seyed Mojtaba Atarodi,Hesam Amir Aslanzadeh,Saeed Saeedi, Amin Quasem Safarian

ISCAS（2004）

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摘要

In this paper a new low-voltage two-stage class-AB line driver for ADSL applications is presented. The new proposed line-driver consists of only two stages with a new method to control the quiescent current of the output stage. The low-voltage full-CMOS hi-h-linear line driver shows -77 dB THD for a load as low as 20 ohms. The line driver has variable gain, attenuating the input signal from 0dB to -14dB with 2dB steps. The peak to peak differential output swing is 4.2-V from a 2.5-V Supply voltage in a 0.25um standard CMOS technology.

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关键词

CMOS integrated circuits,digital subscriber lines,driver circuits,harmonic distortion,low-power electronics,-77 dB,0 to -14 dB,0.25 micron,2.5 V,4.2 V,ADSL application,CMOS technology,THD,asymmetric digital subscriber line,differential output swing,input signal attenuation,low voltage full CMOS high linear line driver,quiescent current control,two stage line driver

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