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The First IEEE International Workshop on Electronic Design, Test and Applications (DELTA '02)
Power Optimization of Combinational Circuits by Input Transformations
Christchurch, New Zealand
January 29-January 31
ISBN: 0-7695-1453-7
C. Gopalakrishnan, University of South Florida
S. Katkoori, University of South Florida
We present a novel approach for power minimization of CMOS combinational circuits based on transforming power-expensive inputs to functionally equivalent power-optimal inputs. We assume that the environment information is available in the form of either word-level statistics or a long representative input sequence. From the environment information, we derive power-effective input transformations that will save power for any input stream that satisfies the environment properties. We synthesize a transform module that is appended at the primary inputs of the module. The proposed approach can be applied at the system-level by propagating environment information to the primary outputs of the system and then deriving transform circuits for each module. As an example of real-world application, we present results for DCT module in a JPEG compression chip with different input environments (eg. face recognition dataset, weather forecasting). Experimental results are highly encouraging.
Citation:
C. Gopalakrishnan, S. Katkoori, "Power Optimization of Combinational Circuits by Input Transformations," delta, pp.154, The First IEEE International Workshop on Electronic Design, Test and Applications (DELTA '02), 2002
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