MASSACHUSETTS INSTITUTE OF TECHNOLOGY 22 071 6 071 Introduction to Electronics Signals and Measurement Spring 2006 Laboratory 14 Filters Bandwidth Q factor Exercise 1 Here you will design and test a Band Pass filter using the series RLC arrangement discussed in class with a resonant frequency of 2000Hz and a bandwidth of 200Hz Determine the required capacitance inductance and resistance You have choices here so make certain that you have the values you assume Draw the circuit indicating the input and output ports and the element values Draw the general form of the transfer function Build your circuit and connect the input to DAC0 and the output to ACH0 and ACH0 Download the instrument Bandwidth vi from the Labs section Run the program and observe the results Does it work as you expect it to 22 071 6 071 Spring 2006 Page1 Exercise 2 For this final exercise you will design and test the band reject filter shown below L C Vs VR Calculate the magnitude of the transfer function VR H Vs Design the circuit with a resonant frequency of 60 Hz and a bandwidth of 4 Hz This circuit is going to be useful later on when you built your heart rate monitor It will give you the ability to filter the 60Hz noise that will find its way in your signals Build your circuit and connect the input to DAC0 and the output to ACH0 and ACH0 Download and run the instrument called Notch vi from the Labs section to drive your circuit and to observe the response 22 071 6 071 Spring 2006 Page2
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