GM-C filters can be very useful when designing in fine line MOS or in a CMOS or BiCMOS technology. The capacitor sizes can be made small and thus save chip area. They can be easier to test. If the prototype filter is designed with lumped L and C components then these can be replaced with solid state blocks such as integrators. GM – C theory is fairly well understood so the risk in design is relatively low. SPG presents a report on a GM-C bandpass filter we did for interested readers ( engineers, students and Instructors) with an earnest hope that it will be useful. Please visit the SPG website and read or download the report.