High-Speed Compact Circuits with CMOS
نویسنده
چکیده
Characteristics of various CMOS and NMOS circuit techniques are described, along with the shortcomings of each. Then a new circuit ty#e, the CMOS domino circuit, will be described. This involves tbe connection of dynamic CMOS gates in such a way that a single clock edge can be used to turn on all gates in the circuit at once. As a result, complex clocking schemes are not needed and the full inherent speed of the dynamic gate can be utilized. The circtrit is most valuable where gates are complex and have high fan-out such as in arithmetic units. Examples are shown of the use of domino circuits in an 8-bit ALU, where simulations indicate a speed advantage of 1.5 to 2 over traditional circuits, and in a 32-bit ALU where a worst case add in 124 ns was projected and a time less than 100 ns was achieved.
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