Difference between revisions of "Ngspice/C2/Operating-point-analysis-in-NGspice/English-timed"

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|-
 
|-
 
| 00:01   
 
| 00:01   
−
| Dear Friends, Welcome to this spoken tutorial on “'''Operating point analysis'''" in ngspice.
+
| Dear Friends, Welcome to this '''spoken tutorial''' on “'''Operating point analysis'''" in NGspice.
 
|-
 
|-
 
|  00:08
 
|  00:08
−
| In this tutorial we will learn,
+
| In this tutorial, we will learn:
  
 
|-
 
|-
 
|  00:10
 
|  00:10
−
| To perform '''operating''' '''point''' '''analysis.'''
+
|* To perform '''operating point analysis'''
  
 
|-
 
|-
 
|  00:13
 
|  00:13
−
| To verify '''Kirchoff's''' '''voltage''' '''law''' using '''ngspice''' in,'''interactive mode command-line interface and''' '''commandscript included in netlist file.'''
+
|* To verify '''Kirchoff's voltage law''', using '''ngspice''' in-
 +
# '''interactive mode command-line interface''' and
 +
# '''commandscript''' included in netlist file.
  
 
|-
 
|-
 
|  00:24
 
|  00:24
−
| '''Ubuntu''' 12.04 is the '''operating system''' used with '''ngspice version''' 23 '''installed.'''
+
| '''Ubuntu 12.04''' is the '''operating system''' used with '''ngspice''' version 23 installed.
  
 
|-
 
|-
 
|  00:33
 
|  00:33
−
|   Basic knowledge of '''electronic''' '''circuits''' is a prerequisite for this tutorial.
+
| Basic knowledge of '''electronic circuits''' is a prerequisite for this tutorial.
  
 
|-
 
|-
 
|  00:38
 
|  00:38
−
| Basic knowledge of '''Ubuntu''' '''Linux''' and '''shell''' '''commands''' is also required.
+
| Basic knowledge of '''Ubuntu Linux''' and '''shell commands''' is also required.
  
 
|-
 
|-
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|-
 
|-
 
|  00:47
 
|  00:47
−
| The '''circuit''' consists of three prominent '''nodes'''  
+
| The circuit consists of three prominent '''nodes'''-
  
 
|-
 
|-
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|-
 
|-
 
| 00:57
 
| 00:57
−
| In addition, a fourth '''node''' called as '''reference''' or the '''datum''' '''node''' must be marked as '''node''' “0”.  
+
| In addition, a fourth '''node''' called as '''reference''' or the '''datum node''' must be marked as node “0”.  
  
 
|-
 
|-
 
|  01:06
 
|  01:06
−
| This is mandatory for any '''circuit.'''
+
| This is mandatory for any circuit.  
  
 
|-
 
|-
 
|  01:09  
 
|  01:09  
−
|  Let us open the '''ngspice''' '''netlist''' '''example1.cir''' '''file''' corresponding to the '''circuit''' '''schematic''' shown before, in a '''text''' '''editor.'''
+
|  Let us open the '''ngspice netlist''' "example1.cir" file, corresponding to the '''circuit schematic''' shown before, in a '''text editor.'''
  
 
|-
 
|-
 
|  01:19  
 
|  01:19  
−
| I have already opened this in '''gedit''' '''text''' '''editor.'''
+
| I have already opened this in '''gedit''' '''text editor.'''
  
 
|-
 
|-
 
|  01:27
 
|  01:27
−
| Note that the '''netlist''' '''file''' is saved with '''.cir''' '''extension'''  
+
| Note that the netlist file is saved with ".cir" '''extension'''.
  
 
|-
 
|-
 
|  01:32
 
|  01:32
−
| We can see all the '''components''' like '''voltage source, resistors''' and '''current source'''.
+
| We can see all the components like '''voltage source, resistors''' and '''current source'''.
  
 
|-
 
|-
 
|  01:41  
 
|  01:41  
−
| Also the information about '''nodes''' connecting them together.
+
| Also, the information about nodes connecting them together.
  
 
|-
 
|-
 
|  01:46
 
|  01:46
−
| ''' .op command''' included in '''netlist''' '''file''' is used to perform '''operating point analysis'''
+
| ''' ".op" command''', included in netlist file, is used to perform '''operating point analysis'''.
  
 
|-
 
|-
 
|  01:54
 
|  01:54
−
| Now we will '''simulate''' this '''circuit,''' and verify '''Kirchoff's''' '''voltage''' '''law''' using the '''interactive mode-command-line interface.'''
+
| Now we will '''simulate''' this circuit and verify '''Kirchoff's voltage law''' using the '''interactive mode-command-line interface.'''
  
 
|-
 
|-
 
|  02:02
 
|  02:02
−
| let us open '''ngspice''' through '''terminal.'''  
+
| Let us open '''ngspice''' through '''terminal.'''  
  
 
|-
 
|-
 
|  02:06  
 
|  02:06  
−
| Go to top left corner of '''Ubuntu''' '''desktop''' '''screen.'''
+
| Go to top left corner of '''Ubuntu''' desktop '''screen.'''
  
 
|-
 
|-
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|-
 
|-
 
|  02:13  
 
|  02:13  
−
| In the '''search bar,''' write '''terminal''' and press '''Enter.'''
+
| In the '''search bar,''' write "terminal" and press '''Enter.'''
  
 
|-
 
|-
 
|  02:22  
 
|  02:22  
−
| This will open '''Terminal''' '''window.'''
+
| This will open '''Terminal window.'''
  
 
|-
 
|-
 
|  02:26  
 
|  02:26  
−
| Let me resize this window
+
| Let me '''resize''' this window.
  
 
|-
 
|-
 
|  02:30
 
|  02:30
−
| Now I will go to the '''folder''' where the '''netlist''' '''file''' '''example1.cir''' is '''saved.'''
+
| Now, I will go to the folder where the netlist file "example1.cir" is saved.
  
 
|-
 
|-
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|-
 
|-
 
|  02:40
 
|  02:40
−
| On '''terminal,''' I will type '''cd space Desktop slash op hyphen analysis ''' and press '''Enter.'''
+
| On terminal, I will type: '''cd space Desktop slash op hyphen analysis ''' and press '''Enter.'''
  
 
|-
 
|-
 
|  02:55
 
|  02:55
−
| Now let us '''simulate''' the '''ngspice''' '''file.'''
+
| Now, let us '''simulate''' the ngspice file.  
  
 
|-
 
|-
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|-
 
|-
 
|  03:01
 
|  03:01
−
| On '''terminal,''' Type '''ngspice space example1.cir''' and press '''Enter.'''
+
| On terminal, type: '''ngspice space example1.cir''' and press '''Enter.'''
  
 
|-
 
|-
 
|  03:17  
 
|  03:17  
−
| Here you will notice that we have entered into the '''ngspice''' '''command''' '''line interface'''.
+
| Here, you will notice that we have entered into the '''ngspice''' '''command line interface'''.
  
 
|-
 
|-
 
|  03:23  
 
|  03:23  
−
| Type '''run''' and press '''Enter'''  
+
| Type: "run" and press '''Enter'''.
  
 
|-
 
|-
 
|  03:28  
 
|  03:28  
−
| This will '''simulate''' the '''circuit''' and '''store''' the results.
+
| This will '''simulate''' the circuit and store the results.
  
 
|-
 
|-
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|-
 
|-
 
|  03:39   
 
|  03:39   
−
|  According to '''Kirchoff's voltage law,''' '''voltage''' around outer loop should be equal to the value of the '''dc''' '''voltage''' '''source''' V1.
+
|  According to '''Kirchoff's voltage law,''' '''voltage''' around outer loop should be equal to the value of the '''dc voltage source V1'''.
  
 
|-
 
|-
 
|  03:51
 
|  03:51
−
| Calculate '''voltage''' around the outer '''loop.'''  
+
| Calculate voltage around the outer '''loop.'''  
  
 
|-
 
|-
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|-
 
|-
 
|  03:59
 
|  03:59
−
|  In the '''ngspice''' '''command''' '''line interface''' on the '''Terminal''' ,
+
|  In the '''ngspice''' '''command line interface''', on the terminal,
  
 
|-
 
|-
 
|  04:03
 
|  04:03
−
| Type '''print space v of a comma b plus v of b comma c plus v of c''' and press '''Enter''' Key
+
| type: '''print space v of a comma b plus v of b comma c plus v of c''' and press '''Enter''' key.
  
 
|-
 
|-
 
|  04:21
 
|  04:21
−
| Here '''v of a comma b''' denotes the''' voltage drop''' between the '''nodes''' a and b and so on.
+
| Here, '''v of a comma b''' denotes the''' voltage drop''' between the nodes 'a' and 'b' and so on.
  
 
|-
 
|-
 
|  04:29
 
|  04:29
−
| '''print command''' '''displays''' the results of the calculation mentioned to its right side.
+
| '''print''' command displays the results of the calculation mentioned to its right side.
  
 
|-
 
|-
 
|  04:36
 
|  04:36
−
| Notice the result of the '''calculation''' in the '''terminal.'''
+
| Notice the result of the calculation on the terminal.
  
 
|-
 
|-
 
|  04:39
 
|  04:39
−
| It is 30 '''volt''' as shown
+
| It is 30 '''volt''' as shown.
  
 
|-
 
|-
 
|  04:42
 
|  04:42
−
| Now '''calculate''' the value of '''DC''' '''voltage''' '''source''' V1 that is v(a).
+
| Now, calculate the value of '''DC voltage source V1''' that is v(a).
  
 
|-
 
|-
 
|  04:50
 
|  04:50
−
| Type '''print space v of a ''' and press '''Enter'''
+
| Type: '''print space v of a ''' and press '''Enter'''.
  
 
|-
 
|-
 
| 05:00
 
| 05:00
−
| Notice the result of the '''calculation''' in the '''terminal.'''
+
| Notice the result of the calculation on the terminal.
  
 
|-
 
|-
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|-
 
|-
 
|  05:10
 
|  05:10
−
|  Since both '''voltage''' values are equal, the '''Kirchhoff's Voltage law''' is verified for outer loop ''' a,  b, c  and 0.
+
|  Since both voltage values are equal, the '''Kirchhoff's Voltage law''' is verified for outer loop-  a,  b, c  and 0.
  
 
|-
 
|-
 
|  05:21
 
|  05:21
−
| Now we will '''simulate''' this '''circuit,''' and verify '''Kirchoff's voltage law''' using the '''command''' script included in the '''netlist file'''.
+
| Now, we will '''simulate''' this circuit and verify '''Kirchoff's voltage law''', using the '''command script''' included in the netlist file.
  
 
|-
 
|-
 
|  05:31
 
|  05:31
−
| Modified '''netlist''' '''file''' '''example hyphen modified dot cir''' is as shown
+
| Modified netlist file '''example hyphen modified dot cir''' is as shown.
  
 
|-
 
|-
 
|  05:40
 
|  05:40
−
|  As you can see all the '''commands''' we executed in '''command-line interface''' are included in this '''netlist''' as '''control''' '''statements.'''
+
|  As you can see, all the commands we executed in '''command-line interface''' are included in this '''netlist''' as '''control statements.'''
  
 
|-
 
|-
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|-
 
|-
 
|  05:57
 
|  05:57
−
| '''Echo''' command will '''echo''' the text written to its right side, on the '''terminal''' '''window.'''
+
| '''Echo''' command will '''echo''' the text written to its right side, on the '''terminal window.'''
  
 
|-
 
|-
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|-
 
|-
 
|  06:10
 
|  06:10
−
| Now we execute the modified '''netlist''' '''file.'''
+
| Now, we execute the modified '''netlist''' file.
  
 
|-
 
|-
 
|  06:14
 
|  06:14
−
| '''source''' command is used to '''simulate''' the '''netlist''' from within the '''ngspice simulator environment'''
+
| '''source''' command is used to '''simulate''' the '''netlist''' from within the '''ngspice simulator environment'''.
  
 
|-
 
|-
 
|  06:22
 
|  06:22
−
| On the '''terminal''' type '''source space example hyphen modified dot cir''' and press the'''Enter key.'''
+
| On the terminal, type: '''source space example hyphen modified dot cir''' and press the'''Enter''' key.
  
 
|-
 
|-
 
|  06:37
 
|  06:37
−
| This will run the '''simulation''' and directly show the results for '''KVL''' verification.  
+
| This will '''run''' the '''simulation''' and directly show the results for '''KVL''' verification.  
  
 
|-
 
|-
Line 266: Line 268:
 
|-
 
|-
 
|  07:00
 
|  07:00
−
|  Now let us summarize what we learnt in this tutorial.
+
|  Now, let us summarize what we learnt in this tutorial.
  
 
|-
 
|-
 
|  07:03
 
|  07:03
−
| In this tutorial we learnt,
+
| In this tutorial, we learnt-
  
 
|-
 
|-
 
|  07:05
 
|  07:05
−
| To perform '''operating point analysis''' of a given '''circuit.'''
+
|* To perform '''operating point analysis''' of a given '''circuit.'''
  
 
|-
 
|-
 
|  07:09
 
|  07:09
−
| To verify '''Kirchhoff's voltage law''' using '''ngspice''' through '''interactive mode-command line interface ''', '''commandscript''' included in the '''netlist''' file.
+
|* To verify '''Kirchhoff's voltage law''' using '''ngspice''' through '''interactive mode-command line interface ''', '''command script''' included in the '''netlist''' file.
  
 
|-
 
|-
 
|  07:20
 
|  07:20
−
| Watch the video available at the following link  
+
| Watch the video available at the following link.
  
 
|-
 
|-
 
|  07:24
 
|  07:24
−
|  It summarises the Spoken Tutorial project  
+
|  It summarizes the '''Spoken Tutorial''' project.
  
 
|-
 
|-
 
|  07:28
 
|  07:28
−
| If you do not have good bandwidth, you can download and watch it  
+
| If you do not have good bandwidth, you can download and watch it.
  
 
|-
 
|-
 
|  07:32
 
|  07:32
−
|  The Spoken Tutorial Project Team
+
|  The Spoken Tutorial project team:
  
 
|-
 
|-
 
|  07:34
 
|  07:34
−
| Conducts workshops using spoken tutorials  
+
|* Conducts workshops using spoken tutorials.
  
 
|-
 
|-
 
|  07:38
 
|  07:38
−
| Gives certificates for those who pass an online test  
+
|* Gives certificates for those who pass an online test.
  
 
|-
 
|-
 
|  07:41
 
|  07:41
−
|  For more details, please write to '''contact at spoken hyphen tutorial dot org '''
+
|  For more details, please write to:
 +
'''contact at spoken hyphen tutorial dot org '''
  
 
|-
 
|-
 
|  07:47
 
|  07:47
−
| Spoken Tutorial Project is a part of the Talk to a Teacher project  
+
| '''Spoken Tutorial''' Project is a part of the '''Talk to a Teacher''' project.
  
 
|-
 
|-
Line 318: Line 321:
 
|-
 
|-
 
|  07:59
 
|  07:59
−
| More information on this Mission is available at  
+
| More information on this mission is available at:
  
 
|-
 
|-
 
|  08:02
 
|  08:02
−
| spoken hyphen tutorial dot org slash NMEICT hyphen Intro  
+
| '''spoken hyphen tutorial dot org slash NMEICT hyphen Intro'''.
  
 
|-
 
|-
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|-
 
|-
 
|  08:13
 
|  08:13
−
| This script is contributed by Abhishek Pawar and this is Rupak Rokade from IIT Bombay signing off.  
+
| This script is contributed by Abhishek Pawar and this is Rupak Rokade from '''IIT Bombay''', signing off.  
  
 
|-
 
|-

Revision as of 16:32, 24 January 2016

Title of the Script: Operating point analysis using ngspice

Author: Abhishek, IIT Bombay

Keywords: video tutorial, ngspice.

Time Narration
00:01 Dear Friends, Welcome to this spoken tutorial on “Operating point analysis" in NGspice.
00:08 In this tutorial, we will learn:
00:10 * To perform operating point analysis
00:13 * To verify Kirchoff's voltage law, using ngspice in-
  1. interactive mode command-line interface and
  2. commandscript included in netlist file.
00:24 Ubuntu 12.04 is the operating system used with ngspice version 23 installed.
00:33 Basic knowledge of electronic circuits is a prerequisite for this tutorial.
00:38 Basic knowledge of Ubuntu Linux and shell commands is also required.
00:43 We will use the example circuit shown.
00:47 The circuit consists of three prominent nodes-
00:52 “a”,
00:53 “b”
00:55 and “c”.
00:57 In addition, a fourth node called as reference or the datum node must be marked as node “0”.
01:06 This is mandatory for any circuit.
01:09 Let us open the ngspice netlist "example1.cir" file, corresponding to the circuit schematic shown before, in a text editor.
01:19 I have already opened this in gedit text editor.
01:27 Note that the netlist file is saved with ".cir" extension.
01:32 We can see all the components like voltage source, resistors and current source.
01:41 Also, the information about nodes connecting them together.
01:46 ".op" command, included in netlist file, is used to perform operating point analysis.
01:54 Now we will simulate this circuit and verify Kirchoff's voltage law using the interactive mode-command-line interface.
02:02 Let us open ngspice through terminal.
02:06 Go to top left corner of Ubuntu desktop screen.
02:10 Click on theDash home.
02:13 In the search bar, write "terminal" and press Enter.
02:22 This will open Terminal window.
02:26 Let me resize this window.
02:30 Now, I will go to the folder where the netlist file "example1.cir" is saved.
02:38 I do this as follows:
02:40 On terminal, I will type: cd space Desktop slash op hyphen analysis and press Enter.
02:55 Now, let us simulate the ngspice file.
02:59 Let us see how this can be done.
03:01 On terminal, type: ngspice space example1.cir and press Enter.
03:17 Here, you will notice that we have entered into the ngspice command line interface.
03:23 Type: "run" and press Enter.
03:28 This will simulate the circuit and store the results.
03:33 We will verify Kirchoff's voltage law using the above simulation results.
03:39 According to Kirchoff's voltage law, voltage around outer loop should be equal to the value of the dc voltage source V1.
03:51 Calculate voltage around the outer loop.
03:54 For this, let us do the following:
03:59 In the ngspice command line interface, on the terminal,
04:03 type: print space v of a comma b plus v of b comma c plus v of c and press Enter key.
04:21 Here, v of a comma b denotes the voltage drop between the nodes 'a' and 'b' and so on.
04:29 print command displays the results of the calculation mentioned to its right side.
04:36 Notice the result of the calculation on the terminal.
04:39 It is 30 volt as shown.
04:42 Now, calculate the value of DC voltage source V1 that is v(a).
04:50 Type: print space v of a and press Enter.
05:00 Notice the result of the calculation on the terminal.
05:04 If both the results are equal then Kirchoff's voltage law is verified.
05:10 Since both voltage values are equal, the Kirchhoff's Voltage law is verified for outer loop- a, b, c and 0.
05:21 Now, we will simulate this circuit and verify Kirchoff's voltage law, using the command script included in the netlist file.
05:31 Modified netlist file example hyphen modified dot cir is as shown.
05:40 As you can see, all the commands we executed in command-line interface are included in this netlist as control statements.
05:50 That is, the statements in between the dot control and the dot endc statements.
05:57 Echo command will echo the text written to its right side, on the terminal window.
06:04 You can see that we have included the print statements in the netlist.
06:10 Now, we execute the modified netlist file.
06:14 source command is used to simulate the netlist from within the ngspice simulator environment.
06:22 On the terminal, type: source space example hyphen modified dot cir and press theEnter key.
06:37 This will run the simulation and directly show the results for KVL verification.
06:43 You can see that results are the same as seen earlier.
06:48 This brings us to the end of this tutorial.
06:52 Quit the ngspice simulator by typing quit and press the Enter key.
07:00 Now, let us summarize what we learnt in this tutorial.
07:03 In this tutorial, we learnt-
07:05 * To perform operating point analysis of a given circuit.
07:09 * To verify Kirchhoff's voltage law using ngspice through interactive mode-command line interface , command script included in the netlist file.
07:20 Watch the video available at the following link.
07:24 It summarizes the Spoken Tutorial project.
07:28 If you do not have good bandwidth, you can download and watch it.
07:32 The Spoken Tutorial project team:
07:34 * Conducts workshops using spoken tutorials.
07:38 * Gives certificates for those who pass an online test.
07:41 For more details, please write to:

contact at spoken hyphen tutorial dot org

07:47 Spoken Tutorial Project is a part of the Talk to a Teacher project.
07:52 It is supported by the National Mission on Education through ICT, MHRD, Government of India.
07:59 More information on this mission is available at:
08:02 spoken hyphen tutorial dot org slash NMEICT hyphen Intro.
08:09 Thank you for joining.
08:11 Hope you found this tutorial useful.
08:13 This script is contributed by Abhishek Pawar and this is Rupak Rokade from IIT Bombay, signing off.
08:19 Thank You.

Contributors and Content Editors

Madhurig, PoojaMoolya, Pratik kamble, Ranjana, Sandhya.np14

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