Optimal allocation of local feedback in multistage amplifiers via geometric programming
| Autor: | Thomas H. Lee, J.L. Dawson, M. del Mar Hershenson, Stephen Boyd |
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| Rok vydání: | 2002 |
| Předmět: |
Mathematical optimization
Open-loop gain Optimization problem Amplifier Bandwidth (signal processing) Linearity Nonlinear system Control theory Negative feedback amplifier Optimal allocation Electrical and Electronic Engineering Multistage amplifier Geometric programming Network analysis Mathematics |
| Zdroj: | Proceedings of the 43rd IEEE Midwest Symposium on Circuits and Systems (Cat.No.CH37144). |
| DOI: | 10.1109/mwscas.2000.951700 |
| Popis: | We consider the problem of optimally allocating local feedback to the stages of a multistage amplifier. The local feedback gains affect many performance indexes for the overall amplifier, such as bandwidth, gain, rise time, delay, output signal swing, linearity, and noise performance, in a complicated and nonlinear fashion, making optimization of the feedback gains a challenging problem. In this paper, we show that this problem, though complicated and nonlinear, can be formulated as a special type of optimization problem called geometric programming. Geometric programs can be solved globally and efficiently using recently developed interior-point methods. Our method, therefore, gives a complete solution to the problem of optimally allocating local feedback gains, taking into account a wide variety of constraints. |
| Databáze: | OpenAIRE |
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