THRESHOLD LOGIC’S IMPORTANCE IN BUILDING EFFICIENT AND COMPACT DIGITAL CIRCUITS AND ITS SCOPE IN MODERN TECHNOLOGY

ELECTRONICS AND COMMUNICATION ENGINEERING

Power consumption has been a major parameter in designing of integrated circuits. There have been a number of ways to reduce dynamic and leakage power. Some of them have been logic synthesis, restructuring to reduce switching activity, gate sizing, technology mapping, retiming, voltage scaling. Similarly using dual supply device threshold voltage, adaptive body biasing, clock and power gating, transistor stacking. Thus, the techniques for reducing power at logic and circuit level have been thoroughly explored leaving little opportunity for improvement with this the focus has shifted to higher level of design. Such as power efficient microarchitectures, memory, compilers and operating system, system level control, thread migration among processor cores etc. The suffix ‘omics’ in the word threshnomics has been added to the names of many fields to denote studies undertaken on a large scale. Threshold science has become so pervasive in everyday life of making decisions. We investigate differences in power between application-specific integrated circuits (ASICs). A variety of factors cause synthesizable designs to consume 3 to 7× more power. When TLGs (called hybrid circuits) are placed and routed using commercial tools it has been observed that there is a significant reductions in power, leakage, and area of the hybrid circuits when compared with the conventional logic circuits, when both are operated at the maximum possible frequency of the conventional design. Threshold functions have also made major contribution in the stream of biomedical engineering in developing a model mocking the behaviour of the neuron where the concept of threshold is used in decision making in the human brain which is further discussed in the paper.

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