DocumentCode
516698
Title
A G711/G722 Front End Circuit for High Quality Handsfree Telephony
Author
Balestro, F. ; Martel, G. ; Perreal, F. ; Morche, D. ; Senn, P. ; Letourneur, G. ; Jullien, J.P.
Author_Institution
France Telecom - CNET - BP98 - 38243 Meylan Cedex-FRANCE
fYear
1994
fDate
20-22 Sept. 1994
Firstpage
124
Lastpage
127
Abstract
This paper presents the architecture and implementation of an analog-to-digital front end circuit developed for an enhanced quality handsfree telephone terminal, including digital acoustic echo cancellation. This circuit has been implemented in a 1 ¿m analog CMOS process and the design has been optimized using efficient analog and digital silicon generators. As a result, the SNR of each chain is better than 87 dB and the circuit has a total power dissipation of less than 80 mW. Measured results are also presented.
Keywords
Circuits; Digital filters; Echo cancellers; IIR filters; ISDN; Low pass filters; Power dissipation; Signal design; Silicon; Telephony;
fLanguage
English
Publisher
ieee
Conference_Titel
Solid-State Circuits Conference, 1994. ESSCIRC '94. Twentieth European
Conference_Location
Ulm, Germany
Print_ISBN
2-86332-160-9
Type
conf
Filename
5468536
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