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.
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