Realization of Multi-Band LC Filters And Nth Order Complex Filters Using Operational Tranconductance Amplifiers

• Main Authors: Chen-Long Kao, 高泉龍
• Other Authors: Chun-Lung Hsu
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/08041991153185616518

碩士 === 國立東華大學 === 電機工程學系 === 91 === Abstract The thesis includes three parts which are described as follows. First, the low pass transform method is addressed. The method can change the transfer factor and impedance of elements according to the characteristics of filters. Many circuit such as the chebyshev filter, the elliptical filter, the single-band filter, the dual-band filter the n-band filter can be realization by the proposed low pass transform approach. Second, the complex filter is analyzed and realization based on the bilinear theory. The low-pass and band-pass complex filters can be implemented by controlling the input and output. Also, the central frequency and bandwidth can be tuned simultaneously. Moreover, an nth-order low-pass complex filter was present to verify the theoretical analysis. Finally, the universal filter and structural high-pass filter were proposed based on the OTA approach. The circuits present herein are suitable to integration due to the reduced active elements are used and all the capacitors are grounded.