Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Impedence transformation

Status
Not open for further replies.
R

ravet

Member level 5
Joined
Sep 17, 2006
Messages
81
Helped
4
Reputation
8
Reaction score
2
Trophy points
1,288
Location
DSO
Activity points
1,762
Hello

in michael perot lectures, he said:
"Since VCO operates over a very narrow band of
frequencies, we can always do series to parallel
transformations to achieve a parallel network for
analysis"

why??, in rf microelectronics book of razavi, page 51, he discuss impedence transformation, but i didnt realize why narrow band condition????
 

because high Q?
 

    R

    ravet

    Points: 2
    Helpful Answer Positive Rating
Yes, because Q=ω*L/R and only when Q>>1, Ls=Lp. If frequency varies in very large range. High Q would not be true.
 

    R

    ravet

    Points: 2
    Helpful Answer Positive Rating
I think it is because ω*L/R should be a value typically greater than 3 for nonolithic inductors, and this can only be satisfied by a narrow band of frequencies.

Regards,
Cherry
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top