Logic circuit

Details Logic circuit Logic circuit

1997-10-30

2000-10-17

Tokar, Michael

Electronic digital logic circuitry

Function of and, or, nand, nor, or not

Field-effect transistor

326 93, B65H 2024

Patent

active

061337617

ABSTRACT:
Disclosed is a logic circuit of high speed operation, low power consumption and small circuit area. In the logic circuit, the power consumption is reduced without sacrificing the operation speed, by using dynamic asynchronous logic circuits of high speed and large power consumption only for the critical path of arithmetic operation and by using circuits (represented by static circuits) of low power consumption for the remaining portions at which high speed is not required. In this case, only when arithmetic operation is necessary, since the signal transition is given to only the synchronous circuit side, it is possible to reduce the power loss due to the wasteful signal transition. Further, where one bit signal is represented, for instance, although two signal lines are generally required for the dynamic asynchronous logic circuit, since only one signal line is used in the static circuit, it is possible to reduce the circuit area by reducing the quantity of wires.

REFERENCES:
patent: 4910466 (1990-03-01), Kiuchi et al.
patent: 5121003 (1992-06-01), Williams
patent: 5258666 (1993-11-01), Furuki
patent: 5808483 (1998-09-01), Sako
Matsubara, Gensoh & Nobuhiro Ide, "A Low Power Zero-Overhead Self-Timed Division and Square Root Unit Combining a Single-Rail Static Circuit with a Dual Rail Dynamic Circuit," Proceedings of Third International Symposium on Advanced Research in Asynchronous Circuits and Systems. IEEE Computer Society Press, Eindhoven, the Netherlands, 1997, pp. 198-209.
Matsubara and Ide, A Low Zero-Overhead Self-Times Division and Square Root Unit Combining a Single-Rail Static Circuit with a Dual-Rail Dynamic Circuit, IEEE computer society press, pp. 198-209, Apr. 1997.
Randy H. Katz, Contemporary Logic Design, 1994.
Katz, Randy H. "Contemporary Logic Design," The Benjamin/Cummings Publishing Company, Inc., Redwood City, CA; 1994; pp. 256-257 and 310-311.

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