A CMOS modem analog processor for V.22 bis modems |
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| Authors: | Daubert S.J. Green D.W. Khoury J.M. Trosino J.M. Zimany E.J. Barner J.R. Plany J. Tompsett M.F. |
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| Affiliation: | AT&T Bell Lab., Murray Hill, NJ; |
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| Abstract: | A mixed analog/digital chip that forms the core of a medium-speed modem for use on the public switched telephone network is described. It meets CCITT and AT&T requirements for data transmission at 2400 and 1200 b/s, and the AT&T requirement for 300-b/s operation. The chip is implemented in a 1.75-μm analog CMOS process and occupies 32.4 mm 2. The device is powered by a single +5-V supply and consumes less than 115 mW. The architecture and circuit implementation are described, and experimental results are given |
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