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The Research on Power Optimization of Technology-dependent Combination Circuits Based on Static Logic Implications

Author: WangYanQin
Tutor: ZuoJiShun
School: Hunan University
Course: Computer Applications
Keywords: Power optimization Technology mapping Redundancy Implication relations Recursive Learning
CLC: TN432
Type: Master's thesis
Year: 2005
Downloads: 51
Quote: 1
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Abstract

With the rapid increase of the scale and speed of a CMOS integrated circuit, as well as widely used in portable electronic products, circuit power consumption problem is becoming more and more prominent. Power optimization technology can expand in all levels of chip design, this paper studies how to reduce the power consumption of the circuit at the logical level. This article describes an optimized combinational logic circuit power, the main idea is that each node of the circuit flip frequency determined by redundancy addition and removal methods to eliminate the high-power nodes, thereby reducing the total power consumption. In order to achieve this aim, we first of each node in the circuit power consumption from low to high, each considering a low-power nodes using recursive learning algorithm to identify the circuit logical implication; then use these implication relations add some logic gates and connections in the circuit to increase circuit redundancy; Finally, to achieve the purpose of high-power node removal by removing these redundant simplifying circuit, which does not change the premise of the circuit input and output functions to lower the power consumption of the circuit. Power optimization process is repeated, each time you select a new node, and finally get a total transition to reduce the circuit. The experimental data show that this method is very effective for reducing the power consumption of the circuit. The power optimization process, the implication relations can find how much direct impact to the the the circuit power optimization extent size. Recursive learning an entirely looking for logical implication, but taking into account to find the logical implication of the optimal solution is an NP-complete problem within a reasonable amount of time, so in order to find the implication is bound to limit the depth of recursive learning, which in turn will directly affect the implication of the number to be able to find. Therefore, we introduced a new method of looking for logical implication, the method was inspired by the single-channel deductive fault simulation algorithm. Take full advantage of the the static logical implication of internal relations and set operations to the introduction of a series of rules, and then reuse these rules to find the implication. Logic synthesis tool SIS to achieve the logical implication of improved search algorithm. Several typical circuit on in standard circuit set Mcnc'91 of the application of the algorithm the implication Find. The experimental data show that the new method can indeed be found within a reasonable period of time implies more than the recursive method, so as to further optimize the power consumption of the circuit to provide a broader space.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Microelectronics, integrated circuit (IC) > Semiconductor integrated circuits ( solid state circuits ) > Field-effect type
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