翻訳と辞書 Words near each other ・ Logarithmic ・ Logarithmic conformal field theory ・ Logarithmic convolution ・ Logarithmic decrement ・ Logarithmic derivative ・ Logarithmic differentiation ・ Logarithmic distribution ・ Logarithmic form ・ Logarithmic growth ・ Logarithmic integral function ・ Logarithmic mean ・ Logarithmic mean temperature difference ・ Logarithmic norm ・ Logarithmic number system ・ Logarithmic pair ・ Logarithmic resistor ladder ・ Logarithmic scale ・ Logarithmic Schrödinger equation ・ Logarithmic spiral ・ Logarithmic spiral beaches ・ Logarithmic timeline ・ Logarithmic units ・ Logarithmically concave function ・ Logarithmically concave measure ・ Logarithmically concave sequence ・ Logarithmically convex function ・ Logarithmically convex set ・ Logarji ・ Logarovci ・ Logarska Dolina Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Logarithmic resistor ladder ： ウィキペディア英語版 Logarithmic resistor ladder A logarithmic resistor ladder is an electronic circuit composed of a series of resistors and switches, designed to create an attenuation from an input to an output signal, where the logarithm of the attenuation ratio is proportional to a digital code word that represents the state of the switches. The logarithmic behavior of the circuit is its main differentiator in comparison with digital-to-analog converters in general, and traditional R-2R Ladder networks specifically. Logarithmic attenuation is desired in situations where a large dynamic range needs to be handled. The circuit described in this article is applied in audio devices, since human perception of sound level is properly expressed on a logarithmic scale. == Logarithmic input/output behavior == As in digital-to-analog converters, a binary word is applied to the ladder network, whose ''N'' bits are treated as representing an integer value according to the relation: :$\backslash mathrm\; =\; \backslash sum\_^N\; s\_i\; \backslash cdot\; 2^$ where $s\_i$ represents a value 0 or 1 depending on the state of the ''ith'' switch. For a conventional DAC or R-2R network, the output signal value (its voltage) would be: :$V\_\; =\; a\; \backslash cdot\; (\backslash mathrm\; +\; b\; )\; \backslash cdot\; V\_$ where $a$ and $b$ are design constants and where $V\_$ typically is a constant reference voltage. (DA-converters that are designed to handle a variable input voltage are termed multiplying DAC.) In contrast, the logarithmic ladder network discussed in this article creates a behavior as: :$\backslash log\; (V\_\; /\; V\_)\; =\; a\; \backslash cdot\; (\backslash mathrm\; +\; b\; )$ where $V\_$ is a variable input signal. 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「Logarithmic resistor ladder」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.