Title :
Integration and system design trends of ADSL analog front ends and hybrid line interfaces
Author_Institution :
Broadband Access Div., LSI Logic, San Jose, CA, USA
Abstract :
System optimization of the Analog Front End (AFE) and hybrid line interface is a key contributor in achieving high data rate and long reach for Asymmetric Digital Subscriber Line (ADSL) modems. Following a brief review of the ADSL system, the basic building blocks in an AFE, analog line interface, and hybrid matching issues are introduced. Integration trends of a single-channel AFE and circuit design challenges for multi-channel AFE are then presented. Line driver technologies and line receiver design issues are discussed with emphasis on the tradeoff between noise and linearity. Finally, design challenges for a highly integrated ADSL modem chipset with minimal external components are addressed.
Keywords :
amplifiers; analogue integrated circuits; application specific integrated circuits; circuit feedback; digital subscriber lines; driver circuits; impedance matching; modems; ADSL modem chipset; analog front end; asymmetric digital subscriber line; hybrid line interface; line driver technologies; line receiver design issues; linearity; multi-channel front end; noise; system optimization; Central office; Circuit synthesis; Costs; DSL; Driver circuits; Frequency; Internet telephony; Large scale integration; Logic; Modems;
Conference_Titel :
Custom Integrated Circuits Conference, 2002. Proceedings of the IEEE 2002
Print_ISBN :
0-7803-7250-6
DOI :
10.1109/CICC.2002.1012762
