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Towards Asynchronous A-D Conversion

Lookup NU author(s): Professor David Kinniment, Bin Gao, Professor Alex Yakovlev, Dr Fei Xia



Analogue 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 tradeoffs involved in asynchronous converter designs, such as speed, robustness to delay variations, circuit size and design scalability.

Publication metadata

Author(s): Kinniment DJ, Gao B, Yakovlev A, Xia F

Publication type: Report

Publication status: Published

Series Title: Department of Computing Science Technical Report Series

Year: 1997

Pages: 17

Print publication date: 01/01/1997

Source Publication Date: 1997

Report Number: 615

Institution: Department of Computing Science, University of Newcastle upon Tyne

Place Published: Newcastle upon Tyne