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Realization of Inverse Filters Using IC LT1228 with Grounded Capacitors
Department of Electronics and Communication Engineering, Jamia Millia Islamia, New Delhi, India
Department of Electronics and Communication Engineering, Jamia Millia Islamia, New Delhi, India
Department of Electronics and Communication Engineering, Jamia Millia Islamia, New Delhi, India
Department of Electrical Engineering, Indian Institute of Technology Delhi (IIT), New Delhi, India
Department of Electronics and Communication Engineering, Jamia Millia Islamia, New Delhi, India
- 1 Department of Electronics and Communication Engineering, Jamia Millia Islamia, New Delhi, India
- 2 Department of Electronics and Communication Engineering, Jamia Millia Islamia, New Delhi, India
- 3 Department of Electronics and Communication Engineering, Jamia Millia Islamia, New Delhi, India
- 4 Department of Electrical Engineering, Indian Institute of Technology Delhi (IIT), New Delhi, India
- 5 Department of Electronics and Communication Engineering, Jamia Millia Islamia, New Delhi, India
Circuits and Systems·Volume 17 (2026)·Pages 1–15·Published 25 January 2026·DOI10.4236/cs.2026.171001
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Abstract
This paper presents the design and simulation of grounded-capacitor inverse active filters using the LT1228 IC, integrating OTA and CFA for tunable, wide-band operation. Inverse filters are characterized by a frequency response that inversely complements that of standard filters. Three filters—Inverse High Pass, Low Pass, and Band Pass—were modeled in Multisim and analyzed in MATLAB. Results confirmed accurate inverse frequency response, ideal for distortion compensation and modern analog signal processing.
KeywordsInverse Active FiltersLT1228Operational Transconductance Amplifier (OTA)Current Feedback Amplifier (CFA)Grounded CapacitorsAnalog Signal ProcessingElectronic Tunability
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