CMOS CDBA-Based Inverse Filter Structure
Ram Bhagat1, D. R. Bhaskar2, Pragati Kumar3

1Ram Bhagat, Department of Electrical Engineering, Delhi Technological University, Delhi, India.
2D. R. Bhaskar*, Department of Electronics and Communication Engineering, Delhi Technological University, Delhi, India
3Pragati Kumar, Department of Electrical Engineering, Delhi Technological University, Delhi, India.
Manuscript received on December 17, 2019. | Revised Manuscript received on December 25, 2019. | Manuscript published on January 10, 2020. | PP: 2226-2231 | Volume-9 Issue-3, January 2020. | Retrieval Number: C8976019320/2020©BEIESP | DOI: 10.35940/ijitee.C8976.019320
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Abstract: This paper presents a voltage-mode(VM) tunable multifunction inverse filter configuration employing current differencing buffered amplifiers (CDBA). The presented structure utilizes two CDBAs, two/three capacitors and four/five resistors to realize inverse low pass filter (ILPF), inverse high pass filter (IHPF), inverse band pass filter (IBPF), and inverse band reject filter(IBRF) from the same circuit topology by suitable selection(s) of the branch admittances(s). PSPICE simulations have been performed with 0.18µm TSMC CMOS technology to validate the theory. Some sample experimental results have also been provided using off-the-shelf IC AD844 based CDBA. 
Keywords: Analog Filters, Inverse Active Filters, Analog Signal Processing, CDBA
Scope of the Article: Concrete Structures