biquadrate meaning in English

n.
【数学】四乘方，四次方，双二次方。

In this paper , the design of a practical sort of high performance biquadrates elliptic active band - pass filters is emphasized , and then the design techniques and how to calculate the resistors and capacitances , how to make computer simulation and tolerance analysis with computer are described in detail
摘要本文我们重点介绍了一种实用的双二次型高性能椭圆函数有源带通滤波器的设计方法，详细介绍了该滤波器的设计步骤及阻容元件的参数计算，并对设计出的电路用计算机进行模拟仿真和容差分析。