Semi-conductor p19 T-section attenuator

Thread Starter

Yuf

Joined Sep 11, 2014
5
Hi guys,

I'm new here and I have a mathematical problem. It's in page19 in semiconductor textbook. How are the expressions of R1 and R2 are derived from the circuit? Z = 50 ohms.
View attachment 72885

I appreciate all helps!
 

MikeML

Joined Oct 2, 2009
5,444
The T attenuator in the examples is designed to have an input resistance of 50Ohms (and be driven from a 50Ohm source), an output resistance of 50Ohms (and be terminated by a 50Ohms load), while having the tabulated insertion loss.

It is pure Kirchoff and algebra to solve the simultaneous equations in several unknowns to meet the requirements stated above.
 

Thread Starter

Yuf

Joined Sep 11, 2014
5
The T attenuator in the examples is designed to have an input resistance of 50Ohms (and be driven from a 50Ohm source), an output resistance of 50Ohms (and be terminated by a 50Ohms load), while having the tabulated insertion loss.

It is pure Kirchoff and algebra to solve the simultaneous equations in several unknowns to meet the requirements stated above.
Thanks man!
I have found a link of the derivation, for others who are interested

http://axotron.se/index_en.php?page=37
 
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