A novel Nth-order voltage-mode universal filter based on CMOS CFOA

• DOI: 10.1016/j.ijleo.2015.11.127
• Publication Date: 2015-11-23T20:40:09Z
• Authors: Chunyue Wang; Junru Zhang; Lixue Wang; Wenxiao Shi; Deng Jing
• Keywords: 0202 electrical engineering, electronic engineering, information engineering; 02 engineering and technology; 7. Clean energy

Abstract With the development of integrated circuits, the fully integrated continuous time filter has been focused widely. A Nth-order universal filter based on Current Feedback Operational Amplifier (CFOA) is proposed. Compared with available circuits, the proposed circuit using less components (2n CFOAs, n capacitors, and 3n resistors) can realize the universal filter functions without changing circuit configuration, and the operating frequency of proposed filter circuit is at least 10 MHz. All of capacitors in proposed circuit are grounded, this is another benefit from integration point of view. PSPICE simulations have been carried out using 0.18 μm CMOS technology, and sensitivity analysis of proposed Nth-order low-pass filter circuit is completed.