What is impedance matching in layouts?

[manruru]

HI,
somebody asked me about Impedense matching.
i have heard of device matching and resistor matching.
but dont know what is ipmedense matching in doing layouts.
can somebody help me ????

thanks
manruru

 

[Alex_IC]

Re: Impedense matching

Impedance matching needed to get maximum power transfer of the signal and to avoid reflections of the signal in the transmission line as wave lenth of the signal is comparable with device size.

It would be better if you refer to any RFIC textbook, like this one

https://books.google.com/books?id=7...oi=print&ct=title&cad=one-book-with-thumbnail

 

[yaasi]

Impedense matching

Hi manruru,

I think the layout guys need not bother about this impedance matching.It is the head ache of designers.
Correct me if i'm wrong.

Regards,
Yaasi

 

[kansal]

Re: Impedense matching

yup,this is a headache of designers only..as we do impedence matching for maximum power transfer..and so that reflections will be reduced..

 

[sridhar540]

Re: Impedense matching

REALLY IT IS THE HEADACH OF THE DESIGNERS.

THIS IMPEDENCE MATCHING IS REQUIRED FOR MAXIMUM POWER TRANSFER AND FOLLOWS THE THEORM OF MAXIMUM POWER TRANSFER THEORM.

EX IN A TWO STAGE AMPLIFIER IMPEDENCE MATCHING IS REQUIRED BETWEEN THE O/P OF THE FIRST AMPLIFIER TO THE I/P OF THE SECOND AMPLIFIER WITH OUT ANY EXTRA DROP. SO THAT AMPLIFICATION TAKES PLACE FAITHFULLY.

LAYOUT GUYS REALLY NEEDNOT BOTHER ABOUT THAT