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Standard transistor array (star). volume 1: placement technique
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Caroll, B. D. Cox, G. W. |
| Copyright Year | 1979 |
| Description | A large scale integration (LSI) technology, the standard transistor array uses a prefabricated understructure of transistors and a comprehensive library of digital logic cells to allow efficient fabrication of semicustom digital LSI circuits. The cell placement technique for this technology involves formation of a one dimensional cell layout and "folding" of the one dimensional placement onto the chip. It was found that, by use of various folding methods, high quality chip layouts can be achieved. Methods developed to measure of the "goodness" of the generated placements include efficient means for estimating channel usage requirements and for via counting. The placement and rating techniques were incorporated into a placement program (CAPSTAR). By means of repetitive use of the folding methods and simple placement improvement strategies, this program provides near optimum placements in a reasonable amount of time. The program was tested on several typical LSI circuits to provide performance comparisons both with respect to input parameters and with respect to the performance of other placement techniques. The results of this testing indicate that near optimum placements can be achieved by use of the procedures incurring severe time penalties. |
| File Size | 3575735 |
| Page Count | 150 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810023843 |
| Archival Resource Key | ark:/13960/t7pp3wv79 |
| Language | English |
| Publisher Date | 1979-07-26 |
| Access Restriction | Open |
| Subject Keyword | Electronics And Electrical Engineering Gates Circuits Logical Elements Logic Design Large Scale Integration Cmos Optimization Computer Programs Transistor Logic Integrated Circuits Algorithms Digital Integrators Electronic Packaging Chips Electronics Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
