journal6 ›› 2007, Vol. 28 ›› Issue (5): 70-72.
• 物理与电子 • 上一篇 下一篇
出版日期:
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作者简介:
基金资助:
国家自然科学基金资助项目(10647132);湖南省教育厅科学研究项目(05C141)
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摘要:利用R-MOSFET-C器件和CMOS全平衡结构运算放大器设计一个截止频率为500 kHz的四阶巴特沃斯(Butterworth)低通滤波器,该滤波器由工作在线性区的MOS管来做为压控电阻,从而代替一般有源RC滤波器中无源电阻R,通过调节栅极电压大小来改变其等效电阻,达到滤波器截止频率的精确可调.
关键词: R-MOSFET-C 滤波器, Butterworth低通滤波器, PSPICE仿真
Abstract: A fourth-order Butterworth low-pass filter with accurate tunable frequency is designed using CMOS operational amplifier.Utilize the liberalized model behavior of an MOS transistor operating in the triode region instead of a passive resistor.Through tuning the grid-voltage of MOS transistor,we can tune the equivalent resistance,accordingly accurately tuning the cut-off frequency of the filter.The filter’s cut-off frequency is 500 kHz.
Key words: R-MOSFET-C filter;Butterworth low-pass filter;PSPICE , simulation
刘昕, 黎福海, 李和平. 基于R-MOSFET-C的低通滤波器的设计[J]. journal6, 2007, 28(5): 70-72.
LIU Xin, LI Fu-Hai, LI He-Ping. Design of Low-Pass Filter Based on R-MOSFET-C[J]. journal6, 2007, 28(5): 70-72.
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