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Unformatted text preview: a .01 uF capacitor. We used a function generator to create a sinusoidal V in with peak to peak amplitude of 10V. We ran both V in and V out through an oscilloscope. We then measured the amplitude and phase difference of V out for frequencies varying from 1/100 th of the cutoff frequency to 100 time the cutoff frequency. The cutoff frequency is predicted by the equation f o = 1/(2 RC) which in this case was 1.59 KHz. Our graphs show that around the cutoff frequency is where the voltages first begin to change. With the low-pass filter, once you get above f o , the higher the frequency the lower the amplitude. With the high-pass filter it is exactly the opposite. Once you get below the cutoff frequency the amplitude begins to shrink. This is exactly what we predicted would happen....
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- Spring '08
- Electronics, High-pass filter, Low-pass filter, Cutoff frequency, Vout