Low‐noise and low‐sensitivity filters using current‐mode coupled biquads
| Autor: | Drazen Jurisic, George S. Moschytz |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Analogue electronics
Computer science Applied Mathematics Filtering theory Electronic engineering Current mode Sensitivity (control systems) active filters analog circuits coupled biquads current‐feedback operational amplifiers filtering theory output thermal noise second‐generation current conveyors Electrical and Electronic Engineering Active filter Computer Science Applications Electronic Optical and Magnetic Materials Low noise |
| Zdroj: | International Journal of Circuit Theory and Applications. 47:1713-1735 |
| ISSN: | 1097-007X 0098-9886 |
| DOI: | 10.1002/cta.2695 |
| Popis: | In this paper, it is shown that by adding coupling to biquad pairs to obtain a fourth-order band-pass filter, the output thermal noise is reduced. It is shown analytically that minimum output thermal noise is obtained when the biquads are identical and the negative-feedback factor used for coupling is the same as for the minimum sensitivity to component tolerances and ambient changes. Furthermore, by optimizing the coupled biquads for maximum dynamic range, the output noise is further decreased. |
| Databáze: | OpenAIRE |
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