A Formal State Encoding Approach for Peak Current Minimization

• Main Authors: Wei-Chun Peng, 彭偉君
• Other Authors: Shih-Hsu Huang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/48640459097815937741

碩士 === 中原大學 === 電子工程研究所 === 97 === Abstract The design complexity and operation frequency of integrated circuits are getting higher as the semiconductor technology progresses in last decades. Meanwhile, the number of register accommodated in a circuit increases as well. Unfortunately, it results in a large peak current consumption in a short instant, consequently an undesired voltage drop occurs, which may lead to malfunction of the system. This thesis aims at reducing the peak current by means of state encoding of a circuit. An ILP formulation is proposed to reduce the peak current characteristics based on various state coding schemes. Referring to the prior research, such as [1] [2], it shows that they are all focused on the exploration of average power consumption. Whereas, [3][4][5] are mainly discussing the proportionality of average power consumption with respect to the switching activities of signal path states. On the other hand, [6] presented a method of re-encoding the original state codes for peak current reduction, which is substantially different with our scheme. In this thesis, we use an Integer Linear Program (ILP) methodology to find out the best state codes for minimum peak current.