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Optimal Chaining of CMOS Transistors in a Functional Cell

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3 Author(s)
Wimer, S. ; IBM Israel Scientific Center, Technion City, Haifa, Israel ; Pinter, Ron Y. ; Feldman, J.A.

We describe an algorithm that maps a CMOS circuit diagram into an area-efficient, high-performance layout in the style of a transistor chain. It is superior to other published algorithms of this kind in terms of the class of input circuits it accepts, its efficiency, and the quality of the results it produces. This algorithm is intended for the automatic generation of basic cells in a custom or semicustom design environment, thereby removing the burden of arduous mask definition from the designer. We show how our method was used to compose cells in a row into a functional slice (e.g. an adder) that can be used in, say, a data path.

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Computer-Aided Design of Integrated Circuits and Systems, IEEE Transactions on  (Volume:6 ,  Issue: 5 )