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Towards asynchronous A-D conversion

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4 Author(s)
Kinniment, D.J. ; Dept. of Electr. & Electron. Eng., Newcastle upon Tyne Univ., UK ; Gao, B. ; Yakovlev, A.V. ; Xia, F.

Analog to digital (A-D) converters with a fixed conversion time are subject to errors due to metastability. These errors will occur in all converter designs with a bounded time for decisions, and are potentially severe. We estimate the frequency of these errors in a successive approximation converter, and compare the results with asynchronous designs using both a fully speed-independent, and a bundled data approach. It is shown that an asynchronous converter is more reliable than its synchronous counterpart, and that the bundled data design is also faster, on average, than the synchronous design. We also demonstrate trade-offs involved in asynchronous converter designs, such as speed, robustness to delay variations, circuit size and design scalability

Published in:

Advanced Research in Asynchronous Circuits and Systems, 1998. Proceedings. 1998 Fourth International Symposium on

Date of Conference:

30 Mar-2 Apr 1998