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A Low-Complexity Circuit for On-Sensor Concurrent A/D Conversion and Compression

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5 Author(s)

A low-complexity circuit for on-sensor compression is presented. The proposed circuit achieves complexity savings by combining a single-slope analog-to-digital converter with a Golomb-Rice entropy encoder and by implementing a low-complexity adaptation rule. The adaptation rule monitors the output codewords and minimizes their length by incrementing or decrementing the value of the Golomb-Rice coding parameter k. Its hardware implementation is one order of magnitude lower than existing adaptive algorithms. The compression circuit has been fabricated using a 0.35 muM CMOS technology and occupies an area of 0.0918 . Test measurements confirm the validity of the design.

Published in:

Sensors Journal, IEEE  (Volume:7 ,  Issue: 9 )

Date of Publication:

Sept. 2007

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