Design of Analog Gaussian Filter Used in Roughness Measuring Instrument

Author

Jian, Guo ; Jie, Zhu

Author_Institution

Inf. Sch., Beijing WUZI Univ., Beijing, China

fYear

2010

fDate

24-25 July 2010

Firstpage

247

Lastpage

249

Abstract

According to the rational function approximation method of Gaussian filter, the transfer function of an 8-order approximation filter is obtained. Based on value of the quality factor Q of the pole of the transfer function, analog cascade circuits are determined. The optimal cascading sequence and the principle of components are given. When selecting the cut-off frequency of 400 Hz, the experiment of the circuit in frequency domain and time domain is done. The result shows that the circuit achieves the desired target.

Keywords

Gaussian processes; Q-factor; approximation theory; low-pass filters; surface topography measurement; transfer functions; 8-order approximation filter; analog Gaussian filter design; analog cascade circuits; cut-off frequency; frequency 400 Hz; optimal cascading sequence; quality factor; rational function approximation method; roughness measuring instrument; transfer function pole; Cutoff frequency; Filtering theory; Function approximation; Low pass filters; Noise; Analog Filter; Function Approximation; Gaussian Filter; Quality Factor;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Technology and Computer Science (ITCS), 2010 Second International Conference on

Conference_Location

Kiev

Print_ISBN

978-1-4244-7293-2

Electronic_ISBN

978-1-4244-7294-9

Type

conf

DOI

10.1109/ITCS.2010.67

Filename

5557138