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We present design-for-low-power techniques based on glitch reduction for register-transfer level circuits. We analyze the generation and propagation of glitches in both the control and data path parts of the circuit. Based on the analysis, we develop techniques that attempt to reduce glitching power con- sumption by minimizing generation and propagation of glitches in the RTL circuit. Our techniques include restructuring multi- plexer networks (to enhance data correlations, eliminate glitchy control signals, and reduce glitches on data signals), clocking control signals, and inserting selective rising/falling delays. Our techniques are suited to control-flow intensive designs, where glitches generated at control signals have a significant impact on the circuit's power consumption, and multiplexers and registers often account for a major portion of the total power. Application of the proposed techniques to several examples shows significant power savings, with negligible area and delay overheads.

Glitch analysis and reduction in register transfer level power optimization