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

Author

Mehrmanesh, S. ; Atarodi, M. ; Aslanzadeh, H.A. ; Saeedi, S. ; Safarian, A.Q.

Author_Institution

Iran Microelectron. Res. Center, Iran

Volume

4

fYear

2004

fDate

23-26 May 2004

Abstract

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 high-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 0 dB to -14 dB with 2 dB steps. The peak to peak differential output swing is 4.2 V from a 2.5 V supply voltage in a 0.25 μm standard CMOS technology.

Keywords

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; Bandwidth; CMOS technology; DSL; Driver circuits; Frequency; Gain; Modems; Operational amplifiers; Telephony; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on

Print_ISBN

0-7803-8251-X

Type

conf

DOI

10.1109/ISCAS.2004.1329026

Filename

1329026