领先同行MTRONPTI详细的晶体滤波器类别

Bessel Filter 

A filter whose transfer function is derived from a Bessel Polynomial. The approximation gives a filter having a maximally flat time delay but has poor selectivity. This type of filter is close to a Gaussian filter. It has poor VSWR and loses its maximally flat delay properties at wider bandwidths.

贝塞尔滤波器
一种滤波器，其传递函数是从贝塞尔多项式导出的。该近似给出了具有最大平坦时间延迟但选择性差的贴片滤波器。这种类型的滤波器接近于高斯滤波器。它具有较差的VSWR，并且在较宽的带宽下失去其最大平坦延迟特性。

Butterworth Filter 

A filter whose transfer function offers maximally flat amplitude. Selectivity is better than Gaussian or Bessel filters but the delay and phase linearity are worse. The VSWR at center is extremely good. Butterworth filters, in most instances, are the least sensitive to changes in element values.

巴特沃斯过滤器
传递函数提供最大平坦振幅的滤波器。石英晶振选择性比高斯或贝塞尔滤波器好，但延迟和相位线性较差。中心的VSWR非常好。在大多数情况下，巴特沃斯滤波器对元素值的变化最不敏感。

Chebychev Filter 

A filter whose transfer function is derived from a Checbychev equal ripple function in the passband only. These filters offer performance between that of Elliptic function filters and Butterworth filters. For the majority of applications, this is the preferred filter type as they offer improved selectivity when compared to Butterworth filters but result in simpler networks than Elliptic function filters.

切比雪夫滤波器
一种滤波器，其传递函数仅从通带中的Checbychev等波纹函数导出。这些贴片晶振滤波器的性能介于椭圆函数滤波器和巴特沃斯滤波器之间。对于大多数应用，这是优选的滤波器类型，因为与巴特沃斯滤波器相比，它们提供了更好的选择性，但导致的网络比椭圆函数滤波器更简单。

Elliptic Function Filter 

A filter whose transfer function is derived with the use of Jacobean elliptic functions. The amplitude is equal ripple in both passband and stopband. This type of filter offers the most selectivity per pole but has the worst delay and phase linear performance. These filters can sometimes be designed wider than Butterworth or Chebychev filters thereby offering reduced insertion loss.

椭圆函数滤波器
一种滤波器，其传递函数是用雅可比椭圆函数导出的。通带和阻带的振幅相等。这种类型的声表滤波器提供了最高的每极选择性，但具有最差的延迟和相位线性性能。这些滤波器有时可以设计得比Butterworth或Chebychev滤波器更宽，从而降低插入损耗。

Gaussian Filter 

A filter whose transfer function is derived from a Gaussian function. These filters have zero overshoot on the step and impulse response. Rise times and delay are the lowest of the traditional transfer functions. The response is very close to that of the Bessel filter giving poor selectivity and high sensitivity in exchange for superior delay and phase linearity.

高斯滤波器
一种滤波器，其传递函数是从高斯函数导出的。这些陶瓷滤波器在阶跃和脉冲响应上具有零过冲。上升时间和延迟是传统传递函数中最低的。该响应非常接近贝塞尔滤波器的响应，给出了差的选择性和高灵敏度以换取优越的延迟和相位线性。