One-bit noise-shaping converters with high-order loop filters have long been considered difficult or impossible to stabilize. In this paper we discuss a new approach that simplifies the analysis of high-order loops, and present several topologies that can be used for the implementation of such loops. An 18-bit A/D converter IC has been designed using this approach that uses a 5th-order loop filter with an unusual loop topology. Implementation of the 5th-order loop filter using differential switched-capacitor techniques is described. A one-step decimation filter with 115 dB stopband attenuation is used to remove out-of-band shaped quantization noise. Preliminary measurements indicate a dynamic range of 105 dB, a number which is compatible with the requirements of professional audio.

Authors: Adams, Robert W.; Ferguson, Jr., P. F.; Vincellette, S.; Ganesan, A.; Volpe, T.; Libert, B.
Affiliation: Analog Devices Semiconductor, Wilmington, MA,
AES Convention: 90 (February 1991) Paper Number: 3017
Publication Date: February 1, 1991
Subject: Digital Technology and Measurement Techniques

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:
Username:
Password:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.