A Design of Butterworth Low Pass Filter's Layout Based on the Effect of Filter's Order on the Ideal Filter Approximation

摘要

This paper presents the study and analysis on Butterworth Low Pass filter, to discover the filter's order effect on the ideal filter approximation. Theoretically, as the numbers of order increased, the filter will approximate ideal filter characteristics. The challenges are; by increasing the filter's order, it will increase the circuit complexity and the cost. In order to reduce the circuit complexity, the Sallen-Key topology has been selected since the topology requires fewer components. This paper also presents the techniques and issues that should be considered while designing the schematic and layout of the filter.