WEKO3
アイテム
アナログフィルタの合成特性 Ⅱ．ベッセルフィルタ
http://hdl.handle.net/10105/386
http://hdl.handle.net/10105/386642afaf6-7566-4ba3-bac5-2558bfa7ca79
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
NUE02_05.pdf (396.5 kB)
|
|
| アイテムタイプ | 紀要論文 / Departmental Bulletin Paper(1) | |||||||
|---|---|---|---|---|---|---|---|---|
| 公開日 | 2010-06-10 | |||||||
| タイトル | ||||||||
| タイトル | アナログフィルタの合成特性 Ⅱ．ベッセルフィルタ | |||||||
| 言語 | ||||||||
| 言語 | jpn | |||||||
| キーワード | ||||||||
| 主題 | analog filters, combined characteristics, Bessel, Butterworth, アナログフィルター, 合成特性, ベッセル, バタワース | |||||||
| 資源タイプ | ||||||||
| 資源タイプ | departmental bulletin paper | |||||||
| 著者 |
六田, 嘉明
× 六田, 嘉明
|
|||||||
| 著者(ヨミ) | ||||||||
| 姓名 | ムダ, ヨシアキ | |||||||
| 著者別名 | ||||||||
| 姓名 | MUDA, Yoshiaki | |||||||
| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | The "combined" characteristics of the Bessel analog filters is investigated, where the combined characteristics implies the feature of the filters that represents how accurately the original signal will be reproduced when it is first divided by the low pass filter (LPF) and high pass filter (HPF), then those signals are summed after passing through these filters. It has been found that, in the gain-frequency characteristics of the combined filters (LP+HP), the Bessel filters of order N = 4 to 11, and 21 to 30 have rather flat combined gain-characteristics, while those of N =2, 3, and 12 to 20, in the range of N ≦30 calculated, show dips greater than a few dB, at the cross-over angular frequency ω = 1 (renormalized with an half-power angular frequency ω 0 ). This is in contrast with the Butterworth filters previousely investigated: Butterworth filters of odd order have the perfect gain characteristics, namely, │G LPF ( jω ) +G HPF ( jω )│ =1. The group delay characteristics ( τ d) of the Bessel combined filters is better than that of the Butterworth filters. The impulse response of the Bessel low pass filters shows only a simple peak near the corresponding delay time τd , and those of the high pass filters consist of a delta function at t =0 and a slowly varing decay curve (represented by the 1st kind Bessel function J 1 at N →∞ ). As the inpulse response of the combined Bessel filters is the sum of them , it is also simpler than that of the Butterworth filters. | |||||||
| 書誌情報 |
奈良教育大学紀要. 自然科学 巻 51, 号 2, p. 45-53, 発行日 2002-10 |
|||||||
| ISSN | ||||||||
| 収録物識別子タイプ | ISSN | |||||||
| 収録物識別子 | 05472407 | |||||||
| 書誌レコードID | ||||||||
| 収録物識別子タイプ | NCID | |||||||
| 収録物識別子 | AN00181070 | |||||||
| 著者版フラグ | ||||||||
| 出版タイプ | VoR | |||||||
| その他のタイトル | ||||||||
| その他のタイトル | Combined Characteristics of Analog Filters II. Bessel Filter | |||||||
| 出版者 | ||||||||
| 出版者 | 奈良教育大学 | |||||||
