 #1
 9
 0
Hey guys, I see this website a lot when lot when looking for help so I made an account since I cannot find help with this problem anywhere.
Use the ideal diode model to analyze the circuit below (circuit (a) in the attachment). Start by assuming D1 is off and D2 is on.
Ohm's law, Voltagedivision principle
The textbook has the answer (Electrical Engineering Principles and Applications 5th Edition, by Hambley, Example 10.5) but I do not understand it. The answer they have is the second attachment, and the circuits are in the first one.
I am having trouble with a few simple things. I understand that i_{D2} = 0.5mA from Ohms law, but cannot figure out why v_{D1} = +7V. With both those values, I am unsure why the first assumption (D1 off, D2 on), is incorrect, and why the fact that v_{D1} = +7V not consistent with the first assumption?
From there, how did they solve for v_{D2} = 3V with the second assumption (D1 on, D2 off), and why is that consistent with the assumption? I feel like this is a simple question but for some reason I find this confusing. Thanks for the help.
Homework Statement
Use the ideal diode model to analyze the circuit below (circuit (a) in the attachment). Start by assuming D1 is off and D2 is on.
Homework Equations
Ohm's law, Voltagedivision principle
The Attempt at a Solution
The textbook has the answer (Electrical Engineering Principles and Applications 5th Edition, by Hambley, Example 10.5) but I do not understand it. The answer they have is the second attachment, and the circuits are in the first one.
I am having trouble with a few simple things. I understand that i_{D2} = 0.5mA from Ohms law, but cannot figure out why v_{D1} = +7V. With both those values, I am unsure why the first assumption (D1 off, D2 on), is incorrect, and why the fact that v_{D1} = +7V not consistent with the first assumption?
From there, how did they solve for v_{D2} = 3V with the second assumption (D1 on, D2 off), and why is that consistent with the assumption? I feel like this is a simple question but for some reason I find this confusing. Thanks for the help.
Attachments

35.9 KB Views: 583

92 KB Views: 446