关于biquad

kaallka

biquad是双二阶，这种结构的双二是什么意思？传输函数分子分母都是二阶的？
Biquad Switched Capacitor Filter呢？


找到这样的一个相关内容：MAX261是美国MAXIM公司推出的CMOS双二阶通用开关电容有源滤波器，其内部含有两个二阶滤波单元。


so biquad的意思就是两个二阶的意思么？美信的biquad filter有一个经典结构，难不成这个biquad就只是指这个（种）特定结构么？


想不明白了啊，求大神指教一下

kaallka

google也上不去，坑爹，度娘啥都不知道

icdane

biquad is also called bi-linear, basically in the frequency response, the denominator is second order while and numerator can be as high as 2nd order.

kaallka

回复 3# icdane

thaks，

vertyang

In signal processing, a digital biquad filter is a second-order recursive linear filter, containing two poles and two zeros. "Biquad" is an abbreviation of "biquadratic", which refers to the fact that in the Z domain, its transfer function is the ratio of two quadratic functions

gakuse

thanks for your sharing

小小苏666

谢谢