Realization of High-Order OTRA-MOSFET-C Active Filters

详细信息    查看全文

• 作者：Yuh-Shyan Hwang ; Dong-Shiuh Wu ; Jiann-Jong Chen ; Chun-Chi Shih and Wen-Shou Chou
• 刊名：Circuits, Systems, and Signal Processing
• 出版年：2007
• 出版时间：April, 2007
• 年：2007
• 卷：26
• 期：2
• 页码：281-291
• 全文大小：7,256 KB

文摘

High-order linear transformation (LT) MOSFET-C active filters with reduced parasitic capacitance effects based on operational transresistance amplifiers (OTRAs) are presented in this paper. A systematic method is developed to realize voltage-mode LT OTRA-based filters efficiently. Based on the proposed design procedures, we can synthesize high-order filters with OTRAs with only MOSFET resistor circuits (MRCs) and virtual grounded capacitors. Signal processing circuits employing OTRAs have almost constant bandwidths because of the use of current-feedback configurations. A third-order Chebychev lowpass filter is demonstrated. HSPICE simulation results that confirm the theoretical analysis are obtained. Furthermore, the proposed circuits can be extended to higher-order filters.