Faculté des sciences
Texte intégral

Implementation of a micro power 15-bit `floating-point' A/D converter

Grisoni, L. ; Heubi, Alexandre ; Balsiger, Peter ; Pellandini, Fausto

In: International Symposium on Low Power Electronics and Design, 1996, p. 247-252

Micro power A/D converter are required for power sensitive, battery-operated equipment such as hearing aids. This paper overviews the principles of the 15-bit `floating point' converter and presents its implementation in a low voltage 2 μm CMOS technology. The die area is 1.4 by 1.4 mm and the power consumption 50 μW at ±1.25 V and 16 kHz sampling frequency. Measurement showed that the... More

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    Title
    • Implementation of a micro power 15-bit `floating-point' A/D converter
    Author
    • Grisoni, L.. Institut de Microtechnique, Université de Neuchâtel, Switzerland
    • Heubi, Alexandre. Institut de Microtechnique, Université de Neuchâtel, Switzerland
    • Balsiger, Peter. Institut de Microtechnique, Université de Neuchâtel, Switzerland
    • Pellandini, Fausto. Institut de Microtechnique, Université de Neuchâtel, Switzerland
    Document Type
    • Postprint
    Publication Date
    • 1996-08-12
    Language
    • English
    Published in
    • International Symposium on Low Power Electronics and Design, 1996, p. 247-252. Institute of Electrical and Electronics Engineers (IEEE)
    Other Version
    Classification
    • Microengineering
    OAI-PMH Identifier
    • oai:doc.rero.ch:20061205165005-RJ
    Submission No.
    • 20061205165005-RJ
    Summary
    Micro power A/D converter are required for power sensitive, battery-operated equipment such as hearing aids. This paper overviews the principles of the 15-bit `floating point' converter and presents its implementation in a low voltage 2 μm CMOS technology. The die area is 1.4 by 1.4 mm and the power consumption 50 μW at ±1.25 V and 16 kHz sampling frequency. Measurement showed that the internal noise level is higher then expected resulting in a reduced dynamic range of 13 to 14 bits. Informal listening tests showed a very good speech quality.