Optimal allocation of local feedback in multistage amplifiers via geometric programming

作     者：Dawson, JL Boyd, SP Hershenson, MD Lee, TH 

作者机构：Stanford Univ Dept Elect Engn Stanford CA 94305 USA 

出 版 物：《IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS》 (IEEE Trans Circuits Syst I Fundam Theor Appl)

年 卷 期：2001年第48卷第1期

页      面：1-11页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：National Science Foundation  NSF 

主　　题：amplifiers analog circuits circuit optimization design automation geometric programming sensitivity 

摘      要：We consider the problem of optimally allocating local feedback to the stages of a multistage amplifier. The local feed-back 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.