Switched Capacitor Biquad Filter Using CDTA  

作　　者：Meeti Dehran Indu Prabha Singh Kalyan Singh Rabindra Kumar Singh 

机构地区：[1]Department of Electrical and Electronic Engineering, Kamla Nehru Institute of Technology (KNIT), Sultanpur, India [2]Department of Physics and Electronics, R.M.L. University, Faizabad, India [3]epartment of Electronics and Communications Engineering, Shri Ramswaroop Memorial Group of Professional Colleges (SRMGPC), Lucknow, India

出　　处：《Circuits and Systems》2013年第6期438-442,共5页电路与系统（英文）

摘　　要：A switched capacitor biquad filter using current differencing transconductance amplifier (CDTA) is presented in this paper. The proposed circuit employs only one CDTA, two virtually grounded capacitors and one switched capacitor. It is a resistorless circuit, so it is beneficial to IC implementation in terms of space consideration. The proposed circuit is a second order single input multiple output (SIMO) current-mode filter. This filter can simultaneously realize all basic filter functions high pass, low pass and band pass responses without any component-matching conditions. All the active and passive sensitivities are low. The natural angular frequency (ω0) and quality factor (Q) of proposed filter can be electronically controlled. Owing to current mode operation it consumes less power. PSPICE simulation results are used to verify the theoretical analysis.A switched capacitor biquad filter using current differencing transconductance amplifier (CDTA) is presented in this paper. The proposed circuit employs only one CDTA, two virtually grounded capacitors and one switched capacitor. It is a resistorless circuit, so it is beneficial to IC implementation in terms of space consideration. The proposed circuit is a second order single input multiple output (SIMO) current-mode filter. This filter can simultaneously realize all basic filter functions high pass, low pass and band pass responses without any component-matching conditions. All the active and passive sensitivities are low. The natural angular frequency (ω0) and quality factor (Q) of proposed filter can be electronically controlled. Owing to current mode operation it consumes less power. PSPICE simulation results are used to verify the theoretical analysis.

关 键 词：Current Differencing TRANSCONDUCTANCE AMPLIFIER (CDTA) Biquad FILTER CURRENT-MODE CIRCUIT 

分 类 号：TN7[电子电信—电路与系统]