Frequency bandwidth
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The spread of a signal's frequency spectrum is called the signal's frequency bandwidth. The frequency bandwidth of a filter or amplifier is defined as the spread of frequencies that can be passed or amplified. In either case, it is often defined as the width between two frequencies where the frequency spectrum is 3 dB below its maximum value. [Shigeo Tsujii] Source: Heibonsha World Encyclopedia, 2nd Edition Information |
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ある信号の周波数スペクトルの広がりを，その信号の周波数帯域幅という。フィルターや増幅器などの周波数帯域幅は，通過あるいは増幅させうる周波数の広がりで定義される。どちらの場合も，周波数スペクトルがその最大値より3dB低下する二つの周波数間の幅で定義されることが多い。【辻井 重男】
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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