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We propose a Dynamically Biased Multi Threshold CMOS (DBMT) technique for power gating in FDSOI. In DBMT, effective threshold voltage of a high-Vt power switch transistor is lowered by forward body biasing (FBB) to improve performance at the operation, while it is raised by reverse body biasing (RBB) to further reduce leakage in the sleep state. We applied this technique to a 32-bit multiplier circuit...
This paper aims to measure the minimum energy point of logic circuits using SOTB and a bulk device, and to study the characteristics of logic circuits in SOTB at ultra-low voltage. We designed test chips including 32bit adder and 16bit multiplier circuits in 65nm SOTB and 65nm bulk devices. Measurement results revealed that the minimum energy of SOTB is about 39–49% smaller than that of the bulk The...
Coal fly ash emitted from coal-fired electric power stations generally contains environmentally regulated trace elements. In particular, boron, arsenic, and selenium have been recognized as troublesome trace elements because elutions from the fly ash contain them. In order to design an effective removal process for these trace elements, we have developed and investigated an acid-washing process. The...
Coal fly ash emitted from coal thermal power plants generally contains tens ppm of arsenic, one of the hazardous elements in coal, during combustion and their elution to soil or water has become a public concern. In this study, the acid washing process developed by the authors was applied to the removal of arsenic from coal fly ash. Laboratory- and bench-scale investigations on the dissolution behavior...
Boron as an environmentally regulated substance is well known to condense in the coal fly ash generated from coal combustion plants. Since boron in the coal fly ash tends to elute into the soil easily, a technology for its stabilization or removal from fly ash is required. An acid washing process is proposed and studied as one of the candidate technologies for the removal of boron from coal fly ash...
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