Integration of a short-loop SLIC in a low-voltage submicron BiCMOS technology

Author

Aliahmad, Mehran ; Andre, C. ; Salama, T.

Author_Institution

Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada

Volume

33

Issue

6

fYear

1998

fDate

6/1/1998 12:00:00 AM

Firstpage

850

Lastpage

858

Abstract

This paper presents the high-voltage building blocks of a short-loop subscriber line interface circuit (SLIC), implemented in a 5 V 0.8 μm BiCMOS technology using fully compatible high-voltage MOS transistors. The presented circuits include a 30 V class-AB line driver, a 30 V fully differential preamplifier, and a novel common-mode feedback circuit. Using a floating-current-mirror technique, the line driver features a well-controlled quiescent current of 600 μA and is capable of delivering more than 30 mA of current into the loop. With an area of 0.34 mm², the line driver exhibits a bandwidth of 3.6 MHz for a 600 Ω/1 nF load. The preamplifier and its common-mode feedback circuit feature a compact size (0.1 mm²) and small power dissipation (10 mW). The circuits are ideal for the integration of a short-loop SLIC on a single chip with other low-voltage building blocks

Keywords

BiCMOS analogue integrated circuits; application specific integrated circuits; compensation; differential amplifiers; driver circuits; feedback amplifiers; operational amplifiers; preamplifiers; subscriber loops; 0.8 micron; 10 mW; 3.6 MHz; 30 V; 30 mA; 5 V; ASIC; HV MOS transistors; LV submicron BiCMOS technology; class-AB line driver,; common-mode feedback circuit; floating-current-mirror technique; fully differential preamplifier; high-voltage building blocks; low-voltage building blocks; short-loop SLIC; subscriber line interface circuit; Bandwidth; BiCMOS integrated circuits; Central office; Coaxial cables; Copper; Driver circuits; Feedback circuits; Hybrid fiber coaxial cables; Optical fiber cables; Preamplifiers;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.678646

Filename

678646