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词汇 Bessel filter
分类 英语词汇 英语翻译词典
释义

Bessel filter

中文百科

贝塞尔滤波器

在电子学和信号处理领域，贝塞尔滤波器（Bessel filter）是具有最大平坦的群延迟（线性相位响应）的线性滤波器。贝塞尔滤波器常用在音频天桥系统中。模拟贝赛尔滤波器在几乎整个通频带都具有恒定的群延迟，因而在通频带上保持了被过滤的信号波形。滤波器的得名德国数学家弗雷德里希·贝塞尔，他发展了滤波器的数学理论基础。

英语百科

Bessel filter 贝塞尔滤波器

A plot of the gain and group delay for a fourth-order low pass Bessel filter. Note that the transition from the pass band to the stop band is much slower than for other filters, but the group delay is practically constant in the passband. The Bessel filter maximizes the flatness of the group delay curve at zero frequency.
The roots of the third-order Bessel polynomial are the poles of filter transfer function in the s plane, here plotted as crosses.
Gain plot of the third-order Bessel filter, versus normalized frequency
Group delay plot of the third-order Bessel filter, illustrating flat unit delay in the passband

In electronics and signal processing, a Bessel filter is a type of analog linear filter with a maximally flat group/phase delay (maximally linear phase response), which preserves the wave shape of filtered signals in the passband. Bessel filters are often used in audio crossover systems.
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