ecse291_lab_notes - ) = (T L )*ln(2)] Frequency response...

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Transfer function Solve : H(jw) = Vo/Vi Definition : A transfer function is a mathematical expression of the relationship between the input signal and output signal of a system. Frequency response – magnitude Solve : |Vo|/|Vi| (using Mean CH1 – Mean CH2 on screen) Definition : The frequency response of a system is a curve showing how well the system passes various frequencies. A filter is characterized by the shape of its frequency response. Frequency response – phase Solve : (d/T) * 360 Definition : The time expressed in degrees between the same reference point on two periodic waveforms. Time constant If the half-life time of the current (voltage across the resistor) is measured, the time- constant can be calculated using the relation [(t 1/2
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Unformatted text preview: ) = (T L )*ln(2)] Frequency response cutoff frequency Solve : [SEE PAGE 7 IN EXPERIMENT 5 NOTES] Definition : In a filter, the cutoff frequency is the point where the response is 3 dB down in amplitude from the level of the passband. Beyond the cutoff frequency, the filter will attenuate all other frequencies, depending on the design of the filter. Frequency response quality factor (only used for bandpass) Solve : Q = f o / (f 2 f 1 ) Definition : A measure of the sharpness of resonance or frequency selectivity of a resonant vibratory system having a single degree of freedom, either mechanical or electrical. For plotting on logarithmic paper, use: 20 log 10 |H(jw)| (result in dB decibels)...
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This note was uploaded on 12/01/2009 for the course ECSE ECSE 291 taught by Professor Khazaka during the Winter '03 term at McGill.

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