Journal Forum

Synthetic Reverberator - January 1960

Sound Board: High-Resolution Audio - October 2015

Synchronized Swept-Sine: Theory, Application, and Implementation - October 2015

Access Journal Forum

AES E-Library

Principles of Oversampling A/D Conversion

Document Thumbnail

Growing practical importance of oversampling analog-to-digital converters (OSADCs) reflects a synergism between microelectronic technology trends and signal theory, neither of which alone is sufficient to explain OSADCs fully. This paper reviews the overall problem of performing signal acquisition-antialiasing, sampling, and quantization-with real hardware, and the ways in which oversampling facilitates this task, sometimes counterintuitively. OSADCs can be seen to overlap and redispose these three traditionall separate operations so as to use manufacturable technology efficiently. Various analog topologies in OSADCs-multibit, 1-bit, feedback, and feedforward-can accomplish the critical step of noise shaping. They differ in their detailed behavior and their dependence on fabrication technology. Insight into the roles of oversampling, and its diverse explanations in the literature, arises from surveying the disparate -cultures- of analog-to-digital conversion that have contributed to its development. Finally, in various ways OSADCs can (and cannot) be compared both to more conventional (sample-by-sample) analog-to-digital converters, and to predictive coders, such as delta modulators.

JAES Volume 39 Issue 1/2 pp. 3-26; February 1991
Publication Date:

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!

Facebook   Twitter   LinkedIn   Google+   YouTube   RSS News Feeds  
AES - Audio Engineering Society