Switching circuits based on comparison operations and multiple-β transistor
Tóm tắt
By using comparison operations, three basic operations, AND, OR and NOT, in Boolean algebra are re-defined. Based on the characteristic that the voltage signals are easy to implement comparison operation, various logic functions realized by connecting emitters of the bipolar transistor are analyzed. Furthermore, a novel multiple-β transistor and the linear AND-OR gate, whichis composed of the transistor, are investigated. Super high-speed characteristic and multiple-cascade capability of the linear AND-OR gate are verified by PSPICE simulation. Based on the analysis of high-speed switch, which is compatible with the linear AND-OR gate, a high-speed inverter is proposed, which is composed of multiple-β transistors. The corresponding flip-flop design is also given. Finally, the criterion for using linear AND-OR gate to design high-speed switching circuits are presented. Some combinational and sequential circuits are designed as the practical examples. Discussion indicates that the switching circuits based on multiple-β transistor can be applied in high-speed design field.
Tài liệu tham khảo
Wu, X., Comparison logic and its application in digital circuits, inProc. of ICCAS, Beijing, (ed. Institute of Electronics, Chinese Academy of Sciences), Beijing: Science Press, and Singapore: World Scientific, 1985, 440–443.
Wu, X.,Design Principle of Multivalued Logic Circuits (in Chinese), Hangzhou: Hangzhou University Press, 1994.
Wu, X., Chen, X., Algebra system for ECL logic circuits,IEE Proceedings (Part G), 1991, 138 (6): 679.
Elmasry, M. I.,Digital Bipolar Integrated Circuits, New York: John Wiley & Sons, 1982.
Skokan, Z. E., Emitter function logic—Logic family for LSI,IEEE J. Solid-State Circuits, 1973, 8 (5): 356.
Wang, S., Sun, X., Wang, R., A new high speed integrated logic—Multicell-type logic (DYL),Acta Electronica Sinica (in Chinese), 1978, 6 (2): 43.
Wang, S., Shi, Y., Zhu, R., A multicell-type logic (DYL) 12 bit x 12 bit super high speed multiplier,Chinese Journal of Semiconductors (in Chinese), 1987, 8 (5): 466.
Wang, S., Wu, X., Shi, Y.et al., The new super high speed digital circuit based on linear AND-OR gates,Journal of Electronics (in Chinese), 1995, 17 (4): 337.
Wu, X., Jiang, B., High-speed logic gates based on multiple-β transistor,Chinese Science Bulletin, 1996, 41 (4): 343.
Wu, X., Chen, X., Hurst, S. L., An investigation into ternary comparison operators,Int. J. Electronics, 1988, 64 (6): 849.
Wang, S., Wu, X., Feng, H., The high speed ternary logic gates based on multiple-β transistors, inIEEE Proc. of ISMVL, Bloomington, Los Alamitos, California: IEEE Computer Society Press, 1995, 178–181.