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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Asymptotic gain model ： ウィキペディア英語版 Asymptotic gain model The asymptotic gain model〔Middlebrook, RD: ''Design-oriented analysis of feedback amplifiers''; Proc. of National Electronics Conference, Vol. XX, Oct. 1964, pp. 1–4〕 (also known as the Rosenstark method) is a representation of the gain of negative feedback amplifiers given by the asymptotic gain relation: :$G\; =\; G\_\; \backslash left(\; \backslash frac\; \backslash right)\; +\; G\_0\; \backslash left(\; \backslash frac\; \backslash right)\; \backslash \; ,$ where $T$ is the return ratio with the input source disabled (equal to the negative of the loop gain in the case of a single-loop system composed of unilateral blocks), ''G∞'' is the asymptotic gain and ''G0'' is the direct transmission term. This form for the gain can provide intuitive insight into the circuit and often is easier to derive than a direct attack on the gain. Figure 1 shows a block diagram that leads to the asymptotic gain expression. The asymptotic gain relation also can be expressed as a signal flow graph. See Figure 2. The asymptotic gain model is a special case of the extra element theorem. ==Definition of terms== As follows directly from limiting cases of the gain expression, the asymptotic gain ''G∞'' is simply the gain of the system when the return ratio approaches infinity: :$G\_\; =\; G\backslash \; \backslash Big\; |\_\backslash \; ,$ while the direct transmission term ''G0'' is the gain of the system when the return ratio is zero: :$G\_\; =\; G\backslash \; \backslash Big\; |\_\backslash \; .$ 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Asymptotic gain model」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.