Fully integrated voiceband codec in a standard digital CMOS technology.

A 2.7-V complete voiceband codec with high-performance speech interfaces is presented. It includes a low-noise microphone preamplifier and loudspeaker/earpiece drivers. In the 4-kHz signal bandwidth, the ADC achieves a dynamic range of 80 dB and a full scale S/(THD + N) ratio of 71 dB, while the DAC...

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Bibliographic Details
Published in:	IEEE Journal of solid state circuits 39, 8 (2004).
Main Author:	Pernici, S.
Format:	Article
Language:	English
Subjects:	0.18 micron. 0.35 micron. 12 mW. 2.7 V. 4 kHz. 71 dB. ADC. CMOS analog integrated circuits. CMOS integrated circuits. DAC. Bipolar transistors. Earpiece drivers. High-performance speech interfaces. Linear capacitors. Loudspeaker drivers. Low power electronics. Low-noise microphone preamplifier. nMOS transistors. Nonlinear poly-nwell capacitors. pMOS transistors. Power dissipation. Signal bandwidth. Unsalicided poly resistors. Voiceband codec.