Docsity
Log inSign up
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search Store documents

The best documents sold by students who completed their studies

Search through all study resources
Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

University Rankings

Discover the best universities in your country according to Docsity users

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

From our blog

Exams and Study
Go to the blog

The Step Response of an RC Circuit - Lab Experiment 2 | ELEC 195, Lab Reports of Microelectronic Circuits

Wentworth Institute of Technology (WIT)Microelectronic Circuits
Prof. Ali Khabari

Material Type: Lab; Professor: Khabari; Class: CIRCUIT THEORY II; Subject: Electronics; University: Wentworth Institute of Technology; Term: Unknown 1989;

Typology: Lab Reports

Pre 2010
On special offer
30 Points
Discount

Limited-time offer

Uploaded on 08/18/2009

koofers-user-jnx
koofers-user-jnx 🇺🇸

5

(1)

10 documents

1 / 5

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Wentworth Institute of Technology Name:
Department of Electronics and Mechanical Date:
ELEC 195 - Circuits Theory II
Experiment 2
The Step Response of an RC Circuit
Objective:
1. To become familiar with the step response of an RC circuit.
2. To become familiar to Agilent VEE software
3. To compare the mathematical expression of the voltage across the capacitor with
the experimental data obtained via Agilent VEE
Equipment Required:
Resistors: 100 K, 100 K
Capacitors: 100F
Leads: 2 pairs of banana to alligators clips
Jumpers
A breadboard
Resume of Theory:
We consider the currents and voltages that arise when energy is being acquired by an
inductor or capacitor due to the sudden application of a dc voltage or current source. RL
and RC circuits are also known as first-order circuits, because the voltages and
currents described by first-order differential equation. A sudden application of a dc
voltage can be achieved by placing an analog switch after the voltage source.
A. Khabari Wentworth Inst. of Tech. 1
pf3
pf4
pf5
Discount

On special offer

Partial preview of the text

Download The Step Response of an RC Circuit - Lab Experiment 2 | ELEC 195 and more Lab Reports Microelectronic Circuits in PDF only on Docsity!

Wentworth Institute of Technology Name: Department of Electronics and Mechanical Date: ELEC 195 - Circuits Theory II

Experiment 2

The Step Response of an RC Circuit

Objective:

1. To become familiar with the step response of an RC circuit. 2. To become familiar to Agilent VEE software 3. To compare the mathematical expression of the voltage across the capacitor with the experimental data obtained via Agilent VEE Equipment Required: Resistors: 100 K, 100 K Capacitors: 100 F Leads: 2 pairs of banana to alligators clips Jumpers A breadboard Resume of Theory: We consider the currents and voltages that arise when energy is being acquired by an inductor or capacitor due to the sudden application of a dc voltage or current source. RL and RC circuits are also known as first-order circuits , because the voltages and currents described by first-order differential equation. A sudden application of a dc voltage can be achieved by placing an analog switch after the voltage source.

Procedure: Measure the actual value of R 1 and R 2. R 1 (measures) = ____________ R 2 (measures) = ____________ RT = R 1 (measures) + R 2 (measures) = ________________ Construct the circuit of Fig. 1.1 on your breadboard. Connect a voltmeter across the capacitor to monitor the capacitor voltage as a function of time. You can use the output off/on switch on your power supply would act as a switch shown in Fig. 1.1. Set the power supply voltage to 10 volts before connecting the dc power supply to the circuit. Fig, 1 One time constant ( = RT.C) occurs when the voltage across the capacitor reaches 63.2% of its final value. If the switch is turned on at t = 0 sec, the time constant occurs when the voltage across the capacitor reaches 6.32 volts. Before turning the power supply on, make sure that there is no initial voltage on the capacitor. You can discharge the capacitor by simply shorting the two terminals of the capacitor. Note: Electrolytic capacitors are polarized , i.e. they have a + terminal and a - terminal. Be sure to connect the + terminal to the positive supply and the - terminal to ground. If connected backwards, an electrolytic capacitor stops being a capacitor and conducts a large DC current. This current can heat up the capacitor to the point where it may EXPLODE. Unfortunately it's not immediately obvious by looking at most electrolytic capacitors which terminal is positive and which is negative. Most are marked only on the negative terminal, and not with a simple minus sign, but a "minus inside an oval" symbol ( ).

The voltage across the capacitor will rise exponentially to reach a steady state voltage of 10V. Using Agilent VEE program, obtain the step response of the RC circuit ( Vc vs. time ) mathematically (using the measured values of R & C) and experimentally. Monitor the voltage at least for 5  (time constant). Compare the two plots (the experimental and the theoretical plot) obtained from Agilent VEE. Comment on the accuracy of the results. What contributed to the inaccuracy between the two plots. Computer Simulation: Using Pspice, simulate the step response of the RC circuit. Hint: To make sure that there is no initial voltage on the capacitor, you can place a switch parallel to the capacitor which open at t = 0 sec. Thus, the capacitor is shorted prior to the closing of the main switch (Fig. 3). If you double click on the capacitor and set IC (the initial condition) to zero, you do not need to use to the second switch to short the capacitor prior to the closing of the mail switch. Fig. 3 The switch part in Pspice has internal resistance when the switch is closed and opened. If the resistance of the switch is not small enough when the switch is closed and it is not big enough when the switch is closed, you can adjust the switch internal resistance values by double clicking on the part (Fig. 4). Change Ropen to the larger number (For example 10000Meg).