...Air, titanium oxide ceramics, and plastic films such as polyethylene are used as dielectrics. Air variable capacitors, which use air as the dielectric, have a structure in which many electrode plates are stacked together due to the need for capacitance (usually 500 pF or less), and depending on the application, the relationship between the rotation angle and the capacitance is curved. It is common to combine a variable capacitor with a coil to create a tuning circuit, but voltage variable capacitors (variable capacitance diodes) are also used in tuning circuits. ... *Some of the terminology explanations that mention "air variable condenser" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…誘電体として空気,酸化チタン系セラミックス,ポリエチレンなどのプラスチックフィルムが用いられる。誘電体を空気とした空気可変コンデンサーは静電容量(通常500pF以下)の必要上,多数の電極板を重ねた構造をもち,用途によっては回転角と静電容量との関係を曲線的とする。可変コンデンサーをコイルと組み合わせて同調回路とすることは広く行われるが,同調回路には電圧可変コンデンサー(可変容量ダイオード)も用いられる。… ※「空気可変コンデンサー」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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