Design of tool kit for Active Filter Circuit PC-based

Abstract

Filters are circuit that pass selected frequencies while rejecting other frequencies. Active filter use active device such as op-amp combined with passive elements such as resistor, capacitors and inductors. The active devices provide voltage gain, high input impedance, and low output impedance. In addition, active filters have several advantages such as easy to adjust over a wide frequency range. In this project, an active filter circuit’s tool kit has been designed and fabricated on printed circuit board (PCB) that can be use for undergraduate study. This friendly user tool kit also can be interface with laboratory equipment (oscilloscope) for output monitoring and analysis. The student can monitoring a four different filter circuit response like as low pass filter, high pass filter, band pass filter and also band stop filter with replace the output jumper wire to the labeled port on the circuit board. The students also can analysis the different filter response output with replace the component’s value with other desirable value. This tool kit has been proven that can be use to measure the critical frequency of the filter circuit, quality factor, bandwidth, and gain. This tool kit also can exhibit the filter response curve with include some calculation again output voltage and input frequency. For overall, the objective that to use this filter circuit design as a tool kit for undergraduate study has been achieves.