Home > Community > Forums > Custom IC Design > s parameter analysis of a differential amplifier

Email

* Required Fields

Recipients email * (separate multiple addresses with commas)

Your name *

Your email *

Message *

Contact Us

* Required Fields
First Name *

Last Name *

Email *

Company / Institution *

Comments: *

 s parameter analysis of a differential amplifier 

Last post Wed, Mar 4 2009 2:09 PM by Jim McMahon. 1 replies.
Started by aaamin 03 Mar 2009 02:20 PM. Topic has 1 replies and 2766 views
Page 1 of 1 (2 items)
Sort Posts:
  • Tue, Mar 3 2009 2:20 PM

    • aaamin
    • Not Ranked
    • Joined on Tue, Mar 3 2009
    • Posts 3
    • Points 75
    s parameter analysis of a differential amplifier Reply

     Hello, I need s parameter model of a linear equlaizer. The linear equalizer is a differential

     amplifier with high pass charateristics. How to calculate the s parameters ( mainly interested

    in s12) using spectre.

    Thanks

    aaamin 

    • Post Points: 20
  • Wed, Mar 4 2009 2:09 PM

    • Jim McMahon
    • Top 500 Contributor
    • Joined on Fri, Feb 20 2009
    • San Jose, CT
    • Posts 21
    • Points 355
    Re: s parameter analysis of a differential amplifier Reply

    Assuming you want basic differential and not mixed-mode S-parameters, then you can attach a  "balun" component (from the "rfLib" library)  to both the differential input and output of your amplifer. One would then attach a "port" component (from the "analogLib") library to single-ended terminals of the balun. The port should configured with the correct impedance (e.g 50Ohms) and assigned a port number (1 and 2). Depending on your design you may also need to add DC blocking and biasing to the amplifier inputs, etc.

     The "rfLib " library is available in the cadence installation directory: $CDS_INSTALL_DIR/tools/dfII/samples/artist/rfLib

     You should now be ready to simulate the design in spectre using ADE. Setup an "sp" analysis and sweep over the desired frequencies. After the simulation completes, select "Results->Direct Plot->Main Form..." You can also use the calculator to plot S12.

    You may also want to check the RF Design Forum for addition help and suggestions.

     Jim

    • Post Points: 5
Page 1 of 1 (2 items)
Sort Posts:
Started by aaamin at 03 Mar 2009 02:20 PM. Topic has 1 replies.