Low power mixed analog-digital signal processing
2000 (English)In: ISLPED '00 Proceedings of the 2000 international symposium on Low power electronics and design, New York, USA: Association for Computing Machinery (ACM), 2000, 61-66 p.Conference paper (Refereed)
The power consumption of mixed-signal systems featured by an analog front-end, a digital back-end, and with signal processing tasks that can be computed with multiplications and accumulaðtions, is analyzed. An implementation is proposed, composed of switched-capacitor mixed analog/digital multiply accumulate units in the analog front-end, followed by an A/D converter. This impleðmentation is shown to be superior in respect of power consumption compared to an equivalent implementation with a high-speed A/D converter in the front-end, to execute signal processing tasks that include decimation. The power savings are only due to relaxed requirement on A/D conversion rate, as a direct consequence of the decimation. In a case study of a narrowband FIR filter, realized with four multiply accumulate units, and with a decimation factor of 100; power saving is 54 times. Implementation details are given, the power consumption, and the thermal noise are analyzed.
Place, publisher, year, edition, pages
New York, USA: Association for Computing Machinery (ACM), 2000. 61-66 p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-86795DOI: 10.1145/344166.344201ISBN: 1-58113-190-9OAI: oai:DiVA.org:liu-86795DiVA: diva2:582385
2000 International Symposium on Low Power Electronics and Design, ISLPED '00, Rapallo, Italy, July 25-27, 2000