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An Improved Two-Step Binary Logarithmic Converter for FPGAs

Chaudhary, Mandeep, Lee, Peter (2015) An Improved Two-Step Binary Logarithmic Converter for FPGAs. IEEE Transactions on Circuits and Systems II: Express Briefs, 62 (5). pp. 476-480. ISSN 1549-7747. (doi:10.1109/TCSII.2014.2386252) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)
Official URL
http://doi.org/10.1109/TCSII.2014.2386252

Abstract

This brief describes an improved binary linear-to-log (Lin2Log) conversion algorithm that has been optimized for implementation on a field-programmable gate array. The algorithm is based on a piecewise linear (PWL) approximation of the transform curve combined with a PWL approximation of a scaled version of a normalized segment error. The architecture presented achieves 23 bits of fractional precision while using just one 18K-bit block RAM (BRAM), and synthesis results indicate operating frequencies of 93 and 110 MHz when implemented on Xilinx Spartan3 and Spartan6 devices, respectively. Memory requirements are reduced by exploiting the symmetrical properties of the normalized error curve, allowing it to be more efficiently implemented using the combinatorial logic available in the reconfigurable fabric instead of using a second BRAM inefficiently. The same principles can be also adapted to applications where higher accuracy is needed.

Item Type: Article
DOI/Identification number: 10.1109/TCSII.2014.2386252
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts
Faculties > Sciences > School of Engineering and Digital Arts > Instrumentation, Control and Embedded Systems
Depositing User: Tina Thompson
Date Deposited: 04 Sep 2015 11:07 UTC
Last Modified: 29 May 2019 15:59 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50398 (The current URI for this page, for reference purposes)
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