Design of Universal Biquadratic Filter Using Current-feedback Amplifiers

• Main Authors: Kuo-Hua Peng, 彭國華
• Other Authors: Jiun-Wei Horng
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/97b2pn

碩士 === 中原大學 === 電子工程研究所 === 91 === Abstract A new configuration for realizing voltage-mode universal biquadratic filter by using three current-feedback amplifiers (CFAs), two capacitors and four resistors is presented. The proposed configuration can realize lowpass, bandpass, highpass, notch and allpass transfer functions. Some of the derived filter types from the proposed universal biquadratic filter have the advantage of having one (or two) more simultaneous output filter responses. One of the derived filter types has the advantages of realizing non-inverting lowpass, inverting bandpass and non-inverting highpass signals simultaneously with high input impedance and grounded capacitors. The active and passive sensitivities are low. Because the output impedance of the CFA is very low, the output terminals of the proposed configuration can be directly connected to the next stage.