By Topic

Fully integrated voiceband codec in a standard digital CMOS technology

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Pernici, S. ; SGS-Thomson Microelectron., Agrate Brianza, Italy ; Stevenazzi, F. ; Nicollini, G.

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 performs 84 dB and 75 dB, respectively. These performances have been obtained in a pure digital low-cost CMOS process. The only components used are standard nMOS and pMOS transistors, parasitic vertical PNP bipolar transistors, unsalicided poly resistors, nonlinear poly-nwell capacitors, and a few small linear capacitors made with a sandwich of five metals and poly. The active area is 2.7 mm2 in a 0.35-μm, five metal levels, standard digital CMOS technology. Power dissipation is 12 mW. The cell can be easily migrated in more advanced processes with area reduction. A migration in a 0.18-μm digital CMOS process has been achieved.

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:39 ,  Issue: 8 )