+ Post New Thread
Results 1 to 4 of 4
  1. #1
    Member level 5
    Points: 634, Level: 5

    Join Date
    Jan 2018
    Posts
    87
    Helped
    0 / 0
    Points
    634
    Level
    5

    Transmission Line vs Lumped Inductor Choice in Distributed power Amplifier Design

    Hi, my question is similar to the original post given below

    https://www.edaboard.com/showthread....ted+amplifiers

    In my case, I have a power amplifier from 4-40 GHz. I couldn't decide on which to choose. It was mentioned in the original post that we should consider chip area and frequency of operation (below 20 GHz-Inductors, above 20 GHz-Transmission lines and upto 50 GHz- Lumped-Integrated Passive Components). But I want to know that can we use Transmission lines from 1 GHz also? what is best choice in my case?

    Anyone has idea which Razavi book he is talking about because I didn't see any Razavi book that talks about distributed amplifiers.

    •   AltAdvertisement

        
       

  2. #2
    Advanced Member level 5
    Points: 13,110, Level: 27

    Join Date
    Apr 2014
    Posts
    2,027
    Helped
    830 / 830
    Points
    13,110
    Level
    27

    Re: Transmission Line vs Lumped Inductor Choice in Distributed power Amplifier Design

    Quote Originally Posted by circuitking View Post
    But I want to know that can we use Transmission lines from 1 GHz also?
    You will need more line length = more chip area, resulting in higher cost.



    •   AltAdvertisement

        
       

  3. #3
    Advanced Member level 4
    Points: 5,610, Level: 17
    kripacharya's Avatar
    Join Date
    Dec 2012
    Location
    New Delhi
    Posts
    1,017
    Helped
    173 / 173
    Points
    5,610
    Level
    17

    Re: Transmission Line vs Lumped Inductor Choice in Distributed power Amplifier Design

    Transmission line is always better - it is precisely controllable, and works grea,t and is fully analyse-able,



    •   AltAdvertisement

        
       

  4. #4
    Super Moderator
    Points: 256,096, Level: 100
    Awards:
    1st Helpful Member

    Join Date
    Jan 2008
    Location
    Bochum, Germany
    Posts
    44,657
    Helped
    13587 / 13587
    Points
    256,096
    Level
    100

    Re: Transmission Line vs Lumped Inductor Choice in Distributed power Amplifier Design

    Transmission line is always better
    The OP seems to refer to IC implementation, I believe a distributed 1 GHz on chip amplifier is neither reasonable with transmission lines nor lumped LC. You may calculate characteristic parameters for your available technology and check if they are feasible.



--[[ ]]--