A pure nodal-analysis method suitable for analog circuits using nullors
A novel technique suitable for computer-aided analysis of analog integrated circuits (ICs) is introduced. This technique uses the features of both nodal-analysis (NA) and symbolic analysis, at nullor level. First, the nullor is used to model the ideal behavior of several analog devices, namely: tran...
| Authors: | , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2003 |
| Country: | México |
| Institution: | Instituto Nacional de Astrofísica, Óptica y Electrónica |
| Repository: | Redalyc-INAOE |
| OAI Identifier: | oai:redalyc.org:47410305 |
| Online Access: | https://www.redalyc.org/articulo.oa?id=47410305 |
| Access Level: | Open access |
| Keyword: | Ingeniería Nullors CAD Tools Circuit Theory Nodal Analysis Analog Modeling |
| Summary: | A novel technique suitable for computer-aided analysis of analog integrated circuits (ICs) is introduced. This technique uses the features of both nodal-analysis (NA) and symbolic analysis, at nullor level. First, the nullor is used to model the ideal behavior of several analog devices, namely: transistors, opamps, OTAs, and current conveyors. From this modeling approach, it is shown how to transform circuits working in voltage-mode to current-mode and vice-versa. Second, it is demonstrated that using nullors, all non-NA-compatible elements can be transformed into NA-compatible ones, this results in a computationally-improved pure-NA method. Third, the computation of fully-symbolic expressions using , is described. It is demonstrated that a symbolic expression gives more insight in the behavior and performance of the circuit. Finally, several examples demonstrate the suitability and appropriateness of the proposed method to be used in education. |
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