Title :
A 3.3-V ISDN U-interface line driver with a new IQ-control circuit
Author :
Lim, Jinup ; Noh, Sungwon ; Kim, Kwangoh ; Choi, Joongho
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Seoul, South Korea
Abstract :
In this work, we propose a new quiescent current (IQ) control circuit applicable to line drivers for digital subscriber line (DSL) applications. The line driver consists of preamplifier, error amplifiers, output transistors, and IQ control circuits. A new method is proposed for controlling IQ values in order to obtain high linearity performance. It also helps to determine the minimum off-current value of the class-AB output stage to reduce crossover distortion. The line driver is implemented for ISDN U-interface applications. It is fabricated in a 0.35-μm CMOS technology for a single power supply voltage of 3.3 V, and a total harmonic distortion of less than -64 dB is achieved.
Keywords :
CMOS analogue integrated circuits; ISDN; digital subscriber lines; driver circuits; electric current control; preamplifiers; 0.35 micron; 3.3 V; CMOS technology; DSL applications; IQ-control circuit; ISDN U-interface line driver; class-AB output stage; crossover distortion reduction; digital subscriber line applications; error amplifiers; quiescent current control circuit; CMOS technology; DSL; Driver circuits; Error correction; ISDN; Linearity; Power supplies; Preamplifiers; Total harmonic distortion; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2003.814422
