Differential cascode current switch (DCCS) master slice for high

Details Differential cascode current switch (DCCS) master slice for high Differential cascode current switch (DCCS) master slice for high

1983-06-27

1986-08-19

Krass, Errol A.

Boots, shoes, and leggings

307465, 307466, 307468, 364490, H03K 19094, H03K 19173

Patent

active

046073396

ABSTRACT:
A master slice designed for storage in sub-stock and for use in producing very large scale integrated circuits in an automated placement and wiring environment is described that is made from a semiconductor electronic quality wafer and the like, the wafer having a "brickwall" set of active elements such as bipolar transistors together with associated passive elements arranged in a master slice image. The master slice is personalized using optimization techniques including among other steps, the steps of modeling, developing and validating primitive logic diagrams, determining element placement by a Monte Carlo simulated annealing method, selecting hierarchical wiring by a maze runner algorithm and further validation.

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"Bipolar Circuit Design for a 5000-Circuit VLSI Gate Array"; by Dansky, IBM J. Res. Develop.; vol. 25: No. 3, May 1981.
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Article: "A High Density Bipolar Logic Masterslice for Small Systems", J. Z. Chen, et al, IBM J. Res. Develop., vol. 25, No. 3, May 1981, pp. 142-151.

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