Lab4 - the oscilloscope, we got the charging phase of the...

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EE 201 Lab4 Tian Gu Code:721 Team partner: Tielong Su Chaojun Zhang Introduction     :    In this lab, we focused on capacitors, and calculating and measuring of  . And we τ   have   already   known   how   to   get   the   rise   time   and   fall   time   in   both   parallel   and   series  combinations. Also, we are now familiar with how to use the oscilloscope and function generator.  LCR meter We grabbed 4 capacitors and used the LCR meter to measure the values of them. Here we only  recorded the measured values instead of the expected values. C1=93µF  C2=99nF  C3=10µF  C4=0.102nF Charging and discharging We built the circuit and set the oscilloscope. Wave: Square ±5V    T=1ms    Channel 1 And we got the voltage wave on the oscilloscope to confirm the amplitude and frequency,

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The circuit: R=1k   (C=100nF)  We got C=99nF after identifying it. Then we used channel 2 and observed the capacitor voltage. After auto-adjusting the graph by

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Unformatted text preview: the oscilloscope, we got the charging phase of the cycle steadily , So, according to V(t)=Vfinal+(Vinitial-Vfinal), When RC=t, 5 V + 10V[ 1 exp(1)] = 1.32 V = RC=1k *99nF=99s And what we got the time from -5V ~1.32V by using the oscilloscope was =123s Rise time 10%~90% (-4V~4V) 219s Fall time 90%~10% (4V~-4V) 261s Parallel and series combinations We picked a second 100nF capacitor in parallel, we got 97 nF, In this parallel combination case, we got these measurements, parallel=197s Rise time 10%~90% 427s Fall time 90%~10% 459s As the series case, parallel=53.3s Rise time 10%~90% 110s Fall time 90%~10% 117s...
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This note was uploaded on 11/17/2011 for the course EE 201 taught by Professor Kruempel during the Spring '06 term at Iowa State.

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Lab4 - the oscilloscope, we got the charging phase of the...

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