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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 Williamson amplifier ： ウィキペディア英語版 Williamson amplifier A Williamson amplifier refers to a type of vacuum tube (valve) amplifier whose circuit design uses the same principles as a design published by D.T.N. Williamson. Williamson proposed the standard which became generally accepted as the target figure for high-quality audio power amplifiers, for less than 0.1% total harmonic distortion at full rated power output.〔 == Design== In April and May 1947, the British magazine ''Wireless World'' published a pair of articles by D.T.N. Williamson, under the title "Design for a High-quality Amplifier."〔() D.T.N. Willamson, The Williamson Amplifier - A collection of articles reprinted from Wireless world, (Reprint 1994). Original articles appeared in ''Wireless World'' for April and May 1947, and an updated version with minor changes in August 1949, pp.282-287, with additions in October 1949 at p.365, and November 1949 at p.423.〕 The design, which became known as the "Williamson Amplifier", was an early example of high fidelity in an audio amplifier (the commercial LEAK "Point One" Type 15 amplifier of 1945 pre-dates it). The design became widely known for the notably high quality of its audio reproduction, and many Williamson amplifiers were built, both for own use and for sale; follow-up articles were published, with a slightly revised design〔 The simplicity of the design shows in the circuit diagram.〔 The overall negative feedback is clearly seen to be applied by the resistor R25 from the secondary of the output transformer to the cathode of the input V1. While the output transformer is represented simply by the appropriate circuit symbol, it is a component which must be designed with great care. Printed circuit boards (PCBs) were rarely used at the time (they were less necessary than they became for complex semiconductor circuits, due to the relative simplicity of circuits and the use of large socketed components); point-to-point wiring was used. 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「Williamson amplifier」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.