## Re: [Qucs-devel] Current controlled current source example

 Re: [Qucs-devel] Current controlled current source example From: Carsten Koegler - 2011-11-07 10:42:29 ```Hi Shakthi, for me, the simulation results look reasonable. The 'current controlled current source' shorts the 3-ohm resistor, so that all 2A from I1 are flowing through the current source. That's also the reason, why 'voltage.V' is 0. The current on the secondary side is G*input_current = 2*2A = 4A, which is the value, that is measured with Pr2. Best regards Carsten ----- Original Message ----- From: "Shakthi Kannan" To: qucs-devel@... Sent: Monday, November 7, 2011 10:54:56 AM Subject: [Qucs-devel] Current controlled current source example Hi, I am trying to test a simple current controlled current source. The expected value for Pr1.I should be 4A, but Pr2.I should be 6A as taken from exercise 1.10, Chapter I, from Fundamentals of Electrical Engineering book by Leonard S Bobrow. But, I am getting different values. SRC1 should be twice the current that flows through Pr1. How do we calculate the G forward transfer factor in this case? What could I be missing here? <.DC DC1 1 280 330 0 39 0 0 "26.85" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "no" 0 "150" 0 "no" 0 "none" 0 "CroutLU" 0> <120 250 120 270 "" 0 0 0 ""> <120 270 240 270 "" 0 0 0 ""> <340 250 340 270 "" 0 0 0 ""> <340 250 360 250 "" 0 0 0 ""> <420 250 440 250 "" 0 0 0 ""> <540 130 540 190 "" 0 0 0 ""> <540 50 540 70 "" 0 0 0 ""> <420 50 540 50 "" 0 0 0 ""> <420 50 420 190 "" 0 0 0 ""> <240 190 360 190 "voltage" 270 140 58 ""> <240 270 300 270 "" 0 0 0 ""> <240 250 240 270 "" 0 0 0 ""> <120 50 120 190 "" 0 0 0 ""> <440 250 540 250 "" 0 0 0 ""> <300 270 340 270 "" 0 0 0 ""> <240 130 240 190 "" 0 0 0 ""> <120 50 240 50 "" 0 0 0 ""> <240 50 240 70 "" 0 0 0 ""> SK -- Shakthi Kannan http://www.shakthimaan.com ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save \$700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Qucs-devel mailing list Qucs-devel@... https://lists.sourceforge.net/lists/listinfo/qucs-devel ```

 [Qucs-devel] Current controlled current source example From: Shakthi Kannan - 2011-11-07 09:55:02 ```Hi, I am trying to test a simple current controlled current source. The expected value for Pr1.I should be 4A, but Pr2.I should be 6A as taken from exercise 1.10, Chapter I, from Fundamentals of Electrical Engineering book by Leonard S Bobrow. But, I am getting different values. SRC1 should be twice the current that flows through Pr1. How do we calculate the G forward transfer factor in this case? What could I be missing here? <.DC DC1 1 280 330 0 39 0 0 "26.85" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "no" 0 "150" 0 "no" 0 "none" 0 "CroutLU" 0> <120 250 120 270 "" 0 0 0 ""> <120 270 240 270 "" 0 0 0 ""> <340 250 340 270 "" 0 0 0 ""> <340 250 360 250 "" 0 0 0 ""> <420 250 440 250 "" 0 0 0 ""> <540 130 540 190 "" 0 0 0 ""> <540 50 540 70 "" 0 0 0 ""> <420 50 540 50 "" 0 0 0 ""> <420 50 420 190 "" 0 0 0 ""> <240 190 360 190 "voltage" 270 140 58 ""> <240 270 300 270 "" 0 0 0 ""> <240 250 240 270 "" 0 0 0 ""> <120 50 120 190 "" 0 0 0 ""> <440 250 540 250 "" 0 0 0 ""> <300 270 340 270 "" 0 0 0 ""> <240 130 240 190 "" 0 0 0 ""> <120 50 240 50 "" 0 0 0 ""> <240 50 240 70 "" 0 0 0 ""> SK -- Shakthi Kannan http://www.shakthimaan.com ```
 Re: [Qucs-devel] Current controlled current source example From: Carsten Koegler - 2011-11-07 10:42:29 ```Hi Shakthi, for me, the simulation results look reasonable. The 'current controlled current source' shorts the 3-ohm resistor, so that all 2A from I1 are flowing through the current source. That's also the reason, why 'voltage.V' is 0. The current on the secondary side is G*input_current = 2*2A = 4A, which is the value, that is measured with Pr2. Best regards Carsten ----- Original Message ----- From: "Shakthi Kannan" To: qucs-devel@... Sent: Monday, November 7, 2011 10:54:56 AM Subject: [Qucs-devel] Current controlled current source example Hi, I am trying to test a simple current controlled current source. The expected value for Pr1.I should be 4A, but Pr2.I should be 6A as taken from exercise 1.10, Chapter I, from Fundamentals of Electrical Engineering book by Leonard S Bobrow. But, I am getting different values. SRC1 should be twice the current that flows through Pr1. How do we calculate the G forward transfer factor in this case? What could I be missing here? <.DC DC1 1 280 330 0 39 0 0 "26.85" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "no" 0 "150" 0 "no" 0 "none" 0 "CroutLU" 0> <120 250 120 270 "" 0 0 0 ""> <120 270 240 270 "" 0 0 0 ""> <340 250 340 270 "" 0 0 0 ""> <340 250 360 250 "" 0 0 0 ""> <420 250 440 250 "" 0 0 0 ""> <540 130 540 190 "" 0 0 0 ""> <540 50 540 70 "" 0 0 0 ""> <420 50 540 50 "" 0 0 0 ""> <420 50 420 190 "" 0 0 0 ""> <240 190 360 190 "voltage" 270 140 58 ""> <240 270 300 270 "" 0 0 0 ""> <240 250 240 270 "" 0 0 0 ""> <120 50 120 190 "" 0 0 0 ""> <440 250 540 250 "" 0 0 0 ""> <300 270 340 270 "" 0 0 0 ""> <240 130 240 190 "" 0 0 0 ""> <120 50 240 50 "" 0 0 0 ""> <240 50 240 70 "" 0 0 0 ""> SK -- Shakthi Kannan http://www.shakthimaan.com ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save \$700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Qucs-devel mailing list Qucs-devel@... https://lists.sourceforge.net/lists/listinfo/qucs-devel ```
 Re: [Qucs-devel] Current controlled current source example From: Shakthi Kannan - 2011-11-07 11:19:12 ```Hi, --- On Mon, Nov 7, 2011 at 4:12 PM, Carsten Koegler wrote: | for me, the simulation results look reasonable. \-- In which case, my modelling of the circuit is incorrect? I have tried to draw the actual circuit given in the text book: http://shakthimaan.fedorapeople.org/pics/circuit-controlled-current-source.png I2 (capital letter "I") is expected to have twice the current of i1. Thanks for your reply. SK -- Shakthi Kannan http://www.shakthimaan.com ```
 Re: [Qucs-devel] Current controlled current source example From: Carsten Koegler - 2011-11-07 11:34:09 ```Hi Shakthi, that would be this circuit: <.DC DC1 1 280 330 0 43 0 0 "26.85" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "no" 0 "150" 0 "no" 0 "none" 0 "CroutLU" 0> <120 250 120 270 "" 0 0 0 ""> <120 270 300 270 "" 0 0 0 ""> <540 130 540 190 "" 0 0 0 ""> <540 50 540 70 "" 0 0 0 ""> <420 50 540 50 "" 0 0 0 ""> <420 50 420 190 "" 0 0 0 ""> <300 270 420 270 "" 0 0 0 ""> <120 50 120 190 "" 0 0 0 ""> <120 50 240 50 "" 0 0 0 ""> <540 250 540 270 "" 0 0 0 ""> <420 250 420 270 "" 0 0 0 ""> <420 270 540 270 "" 0 0 0 ""> <240 50 420 50 "" 0 0 0 ""> <240 50 240 60 "" 0 0 0 ""> <240 180 240 250 "" 0 0 0 ""> <240 250 360 250 "" 0 0 0 ""> <300 190 360 190 "" 0 0 0 ""> <300 190 300 270 "" 0 0 0 ""> <"Pr1.I" #0000ff 0 3 1 0 0> <"Pr2.I" #0000ff 0 3 1 0 0> <"voltage.V" #0000ff 0 3 1 0 0> Best Regards, Carsten ----- Original Message ----- From: "Shakthi Kannan" To: "Carsten Koegler" Cc: qucs-devel@... Sent: Monday, November 7, 2011 12:19:03 PM Subject: Re: [Qucs-devel] Current controlled current source example Hi, --- On Mon, Nov 7, 2011 at 4:12 PM, Carsten Koegler wrote: | for me, the simulation results look reasonable. \-- In which case, my modelling of the circuit is incorrect? I have tried to draw the actual circuit given in the text book: http://shakthimaan.fedorapeople.org/pics/circuit-controlled-current-source.png I2 (capital letter "I") is expected to have twice the current of i1. Thanks for your reply. SK -- Shakthi Kannan http://www.shakthimaan.com ```
 Re: [Qucs-devel] Current controlled current source example From: Shakthi Kannan - 2011-11-14 13:27:02 ```Hi Carsten, --- On Mon, Nov 7, 2011 at 5:04 PM, Carsten Koegler wrote: | Hi Shakthi, | | that would be this circuit: | | \-- Thanks! That worked. Along with a friend, we are trying to create circuit examples from a text book for qucs so students can benefit from the same. http://gitorious.org/qucs-baburao/ Are there any migration tools/scripts available for future versions? The few circuits I had created with qucs 0.0.15 didn't open with 0.0.16. Thanks again for your prompt response, SK -- Shakthi Kannan http://www.shakthimaan.com ```