# Difference between revisions of "Lab 4 TF EIM"

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= 1-50 kHz filter (20 pnts)= | = 1-50 kHz filter (20 pnts)= | ||

− | + | 1.) Design a high-pass RC filter with a break point between 1-50 kHz. The break point is the frequency at which the filter's attenuation of the AC signal goes to 0(not passed). For a High pass filter, AC signals with a frequency below the 1-50 kHz range will be attenuated . | |

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+ | 2.) Now construct the circuit using a non-polar capacitor. | ||

+ | 3.)use a sinusoidal variable frequency oscillator to provide an input voltage to your filter. | ||

+ | 4.)Measure the input and output voltages for at least 8 different frequencies which span the frequency range from 1 Hz to 1 MHz. | ||

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+ | {| border="3" cellpadding="20" cellspacing="0" | ||

+ | |<math>\nu</math> ||<math>V_{in}</math> || <math>V_{out}</math> || <math>\frac{V_{out}}{V_{in}}</math> | ||

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#Graph the <math>\log \left(\frac{V_{out}}{V_{in}} \right)</math> -vs- <math>\log (\nu)</math> | #Graph the <math>\log \left(\frac{V_{out}}{V_{in}} \right)</math> -vs- <math>\log (\nu)</math> | ||

## Revision as of 20:11, 23 January 2011

- RC High-pass filter

# 1-50 kHz filter (20 pnts)

1.) Design a high-pass RC filter with a break point between 1-50 kHz. The break point is the frequency at which the filter's attenuation of the AC signal goes to 0(not passed). For a High pass filter, AC signals with a frequency below the 1-50 kHz range will be attenuated .

2.) Now construct the circuit using a non-polar capacitor.
3.)use a sinusoidal variable frequency oscillator to provide an input voltage to your filter.
4.)Measure the input and output voltages for at least 8 different frequencies which span the frequency range from 1 Hz to 1 MHz.

Hz | Volts | Volts | |

- Graph the -vs-

# phase shift (10 pnts)

- measure the phase shift between and

# Questions

- compare the theoretical and experimentally measured break frequencies. (5 pnts)
- Calculate and expression for as a function of , , and .(5 pnts)
- Compare the theoretical and experimental value for the phase shift . (5 pnts)
- Sketch the phasor diagram for , , , and . Put the current along the real voltage axis. (30 pnts)
- what is the phase shift for a DC input and a very-high frequency input?(5 pnts)
- calculate and expression for the phase shift as a function of , , and graph -vs . (20 pnts)