Analytical distortion calculation method for CMOS amplifier stages
| Autor: | Ailin Zhang, Guoyong Shi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Total harmonic distortion
Computer science Amplifier 020208 electrical & electronic engineering Transistor 02 engineering and technology law.invention Computer Science::Hardware Architecture law Distortion 0202 electrical engineering electronic engineering information engineering Electronic engineering Operational amplifier Nonlinear element Electrical and Electronic Engineering Cmos amplifier Electronic circuit |
| Zdroj: | Electronics Letters. 56:696-698 |
| ISSN: | 1350-911X 0013-5194 |
| DOI: | 10.1049/el.2020.0824 |
| Popis: | Operational amplifiers (opamps) are often designed in stages. Distortion analysis of multistage opamps is challenging due to multiple non-linearity sources. Therefore, one effective analysis method is to consider a multistage opamp model as a cascade of condensed stages, with each stage modelled by one weakly non-linear element. Then, in order to obtain a satisfactory distortion model, accurate characterisation of the non-linearity of each stage is necessary. In this Letter, the authors propose an analytical calculation method for modelling the weak non-linearity of an amplifier stage consisting of several interconnected transistors. A stage circuit model created by this method can be used to produce analytical harmonic distortion characterisation of closed-loop circuits with peripheral elements. Numerical accuracy of the analytical method has been validated by transistor-level simulation. |
| Databáze: | OpenAIRE |
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