R1 and R2 values should be the same, and C1 and C2 valuesshould be the same. Please note that there are numerous combinations of resistor and capacitor values that could provide the same cutoff frequency calculations, but try to keep the resistor values between 1.0k Ohms and 10.0k Ohms.Calculate the design values of the resistors and capacitors and record all values in Table 1 in the Week 3 iLab cover report.Because it is highly likely that you will not be able to find actual resistor and capacitor components that match your calculated values, try to find values as close as possible to the calculated values for use in your circuit construction, andrecord them in Table 1 in the iLab cover report. If you cannotfind close enough values, you will need to redo the design calculations.Calculate the -3dB frequency from the actual component values used for the circuit. Please keep in mind that all components have a tolerance factor and that your test measurements will reflect this.
calculate the 20 log10 magnitude in the third column. Copy the information into the Week 3 iLab cover report. Input Freq (Hz) Filter Output Vout (p-p) (Vin = 2.0Vpp) 20 Log10 (Vout/Vin) (dB) 100
200 300 400 500 600 700
800 900 1,000 1,100 1,200 1,300
1,400 1,500 1,600 1,700 1,800
1,900 2,000 2,100 2,200 2,300 2,400
2,500 2,600 2,700 2,800 2,900
3,000 Table 1: Data Table for Second Order, Salley-Key, Low-Pass Filter STEP 4: Analysis of the Low-Pass FilterBack to TopIn Excel and using the measured filter response recorded data, create a graph showing all of the information similar to what is shown in Figure 3 below. Copy and paste your graph into the Week 3 iLab cover report. Please remember that graph, axes, and titles are part of the documentation and are part of the requirements to be met for grading.Figure 3: Sample Low-Pass Filter dB/Linear Frequency Response Graph
STEP 5: Applied, Real-Time Moving Average Filters Back to Top In this portion of the lab, you will use the MA FIR CodeWarrior project for the Tower board and ADC and DAC board in order to implement and test a moving average filter of length 9.
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- Spring '19
- Tom Pope