Switching circuits based on comparison operations and multiple-β transistor

Science in China Series E: Technological Sciences - Tập 40 - Trang 439-448 - 1997
Xunwei Wu1, Guoqiang Hang1
1Department of Electronic Engineering, Hangzhou University, Hangzhou, China

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

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