Title :
Design of Analog Gaussian Filter Used in Roughness Measuring Instrument
Author :
Jian, Guo ; Jie, Zhu
Author_Institution :
Inf. Sch., Beijing WUZI Univ., Beijing, China
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;
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
DOI :
10.1109/ITCS.2010.67
