Symbolic Analysis of Analog Circuits With Simplified Active Models
博士 === 國立高雄應用科技大學 === 電子工程系碩士班 === 104 === Symbolic analysis of analog circuit is a set of systematic techniques that use mathematics to investigate and extract the characteristics or behavior of a circuit. Over the last four decades, symbolic analysis methods have developed to a new level and have...
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| Format: | Others |
| Language: | en_US |
| Published: |
2016
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| Online Access: | http://ndltd.ncl.edu.tw/handle/79331375212792650365 |
| Summary: | 博士 === 國立高雄應用科技大學 === 電子工程系碩士班 === 104 === Symbolic analysis of analog circuit is a set of systematic techniques that use mathematics to investigate and extract the characteristics or behavior of a circuit. Over the last four decades, symbolic analysis methods have developed to a new level and have gained much attention from circuit researchers. Symbolic analysis using nodal analysis (NA) is a very convenient technique to analog circuit analysis. It is conducive to having a deep insight of the circuits’ behaviors. It can be further extended to analog circuit synthesis.
The nullor–mirror pathological elements have been used widely in modeling active devices. They can represent active devices with simple structures in nullor–mirror equivalent network for symbolic NA. They reduce the circuit complexities in comparing with the nullor equivalent network counterpart. So the nullor-mirror representations have been used in carrying out symbolic NA to enhance the analytical efficiency.
To know the practical circuit behaviors, the models of active devices that include the non-unity effects (input-output parasitics and non-ideal current or voltage gains) have been presented for symbolic NA. But the active models possess higher circuit complexity. In this study, we propose some non-ideal active device models which are modified from their ideal nullor–mirror models. They possess simpler circuit structures and are used in the proposed symbolic analytical technique. Some practical circuit analyzed examples using the proposed approach are presented to verify the validity and feasibility. The analytical efficiency improvement is shown by the reductions on the order of system of equations and the less nonzero elements of the nodal admittance matrix by applying the symbolic NA formulation.
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