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Survey on Reduction of Ground Bounce Noise in Combinational Circuits

Megha Agarwal

One of the effective method to reduce leakage current in logic circuits during sleep mode is Power gating technique. However, conventional power gating technique for minimizing leakage current introduces ground bounce noise during sleep to active mode transition. This Ground Bounce Noise or Power Gating Noise (PGN) which is generated during mode transition from SLEEP to ACTIVE mode is an important challenge in standard MTCMOS circuit. In this paper various Ground Bounce Noise reduction techniques in MTCMOS circuit has been discussed. An intermediate relaxation mode is investigated to gradually dump the charge stored on the virtual lines to the real ground distribution network during the SLEEP to ACTIVE mode transitions. In addition to this a high performance stacking power gating structure is discussed which minimizes the leakage power and provides a way to control the ground bounce noise in transition mode.