Integrated Selectivity for AM-Receivers

Abstract

An eighth order, symmetrical bandpassfliter for IF-filtering purposes is constructed. The intermodulation free dynamic range (IMFDR) is maximized and amounts in theory to 58,5 dB with a single supply voltage of 8V and a total on chip capacitance of 80 pF. Fundamental constraints for the IMFDR are encountered. Some practical results are given to check the theoretical results.