Experiment 5

# Experiment 5 - V V ripple 175 = With 100 Ω How much does...

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PURPOSE: The purpose of this lab is to stupid the characteristics and operation of half-wave rectifiers and filter circuits. MATERIALS: 1 1000 Ω resistor and 1 100 Ω resistor 1, 1μF capacitor and 1, 100 μF capacitor. 1 pn junction diode. PROCEDURE: 1. Assemble the circuit in figure 1, first applying a 20V peak to peak square wave, and then a 20V peak to peak sine wave. Draw what is seen. 2. Repeat step 1 on assembled circuit of figure 2 3. Repeat step 2 on assembled circuit in figure 3

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RESULTS:

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Part 2: How much does the voltage decrease during the negative half cycle? 10V Part 3: Based on your observations with this capacitor, how big a capacitor would be required to reduce the ripple to 0.1 V? mF C C ms RC t V V V V V V V ripple 99 . 715 ) 1000 ( 8 9 9 . 8 ln ln 1 . 0 1 . 0 max min max min = - = = - = - = = How large is the ripple with the 100 μF? The ripple is 1 V What is the ripple observed with this filter stage in place?

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Unformatted text preview: V V ripple 175 . = With 100 Ω How much does the 100 Ω resistor reduce the dc output voltage across the 1-kΩ load? V V out 6 = With the 100 Ω resistor in place. V V out 9 . 6 = Without the 100 Ω resistor in place. How much does the ripple increase when the 100 Ω resistor is shorted out? V V ripple 440 . = Without 100 Ω CONCLUSION: The importance of a resistive element in series with the capacitor of a rectifier or power supply was confirmed in this lab. It was obvious, that without an resistive element, the ripple voltage became significantly larger. It a realistic scale, this is not good designing, because in most circumstances, using a circuit of this type is meant to gather the most positive voltage from the source as possible....
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Experiment 5 - V V ripple 175 = With 100 Ω How much does...

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