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#### jason

Jan 1, 1970
0
Hello ALl

To be able to get the equation for 3.56 on page
http://www.geocities.com/jason_class/circuit_Zs.jpg
(pls save and open in picture viewer),
I use the result for equation Z1= (1/(a+1)^2).Z2 (page 3, 4th equation
after Figure 5) from document at page
http://www.coilcraft.com/pdf/doc157.pdf

However, I found that from the .pdf file, the 1st and 3rd equation are
contradicting with their results.

Then I found that 4th equation is different when I derived from 1st
equation after Figure 5.
I found that it is Z1= (a+1)^2).Z2 which contradicts with the one shown
in the pdf file.
If I am right with my derivation, then I cannot apply and get the right
Zs' impedance for the page on
http://www.geocities.com/jason_class/circuit_Zs.jpg which I found from
book.

Kindly let me know which is correct and eventually how to get Zs'?
Thank you so much

rgds and thanks
jason

A

#### Andrew Holme

Jan 1, 1970
0
jason said:
Hello ALl

To be able to get the equation for 3.56 on page
http://www.geocities.com/jason_class/circuit_Zs.jpg
(pls save and open in picture viewer),
I use the result for equation Z1= (1/(a+1)^2).Z2 (page 3, 4th equation
after Figure 5) from document at page
http://www.coilcraft.com/pdf/doc157.pdf

However, I found that from the .pdf file, the 1st and 3rd equation are
contradicting with their results.

Then I found that 4th equation is different when I derived from 1st
equation after Figure 5.
I found that it is Z1= (a+1)^2).Z2 which contradicts with the one
shown in the pdf file.
If I am right with my derivation, then I cannot apply and get the
right Zs' impedance for the page on
http://www.geocities.com/jason_class/circuit_Zs.jpg which I found from
book.

Kindly let me know which is correct and eventually how to get Zs'?
Thank you so much

rgds and thanks
jason

The 1st equation after figure 5 is wrong. It should be:

V1/V2 = N2 / (N1+N2)

J

#### jason

Jan 1, 1970
0
Hi Andrew

Thank you so much for putting time in to clarify for me.
I will check it out , I think somewhere still I need some deep thinking
to sort.
Thank you Andrew

rgds and thanks
Jason

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