Abstract
In this brief, we propose a new quiescent current (IQ) control circuit applicable to line drivers for digital subscriber line (DSL) applications. The line driver consists of pre-amplifier, 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.
Original language | English |
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Pages (from-to) | 1421-1424 |
Number of pages | 4 |
Journal | IEEE Journal of Solid-State Circuits |
Volume | 38 |
Issue number | 8 |
DOIs | |
State | Published - Aug 2003 |
Keywords
- CMOS
- Class AB
- Line driver
- Low power
- Low voltage