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RF design

  • clarification on LNA design

    Hi Any one help me that i am doing Complemetary current reuse LNA in MICS band in Cadence spectra...i selected one IEEE paper regarding my project..In that they didnot mention any device specification (i.e., value of inductor,capacitor,resistor,width of transistor) also i don't know how to desidn...
    Posted to RF Design (Forum) by RFDESIGN 2008 on Sat, Aug 20 2011
  • Measuring Fmax for MOS Transistors

    The following question has come up in comments: "How do I measure F max for an MOS transistor?" The measurement methodology -- testbench, analysis, calculator setup, stimulus, etc.-- does not change whether you are measuring bipolar transistors or MOS transistors. On the other hand, the results...
    Posted to RF Design (Weblog) by Art3 on Thu, Aug 11 2011
  • Guidelines for Setting Pnoise/HBnoise Sidebands to Get Accurate Results

    I get quite a few questions from designers along the lines of "How do I set the number of pss/hb harmonics and pnoise/hbnoise sidebands in order to get accurate results?" Here are some general guidelines that I follow: The number of sidebands ( harmonics ) in the simulation can affect performance...
    Posted to RF Design (Weblog) by Tawna on Fri, Aug 5 2011
  • Exporting .gds file from cadence

    Hi All I want to export .gds file from cadence 6.1 and import it to HFSS 10 and do some simulations. Just to make sure my gds file is ok I did import it back to cadence and I do see the same layout. But when I import the same gds file in HFSS 10,I dont see anything. I am not sure what is the problem...
    Posted to RF Design (Forum) by nadroit on Thu, Jul 28 2011
  • IBM45nm (SOI ) technology Gate resistance problem

    Hi All I am using IBM45nm (SOI) technology provided by MOSIS for designing RF circuits. I used cadence 6.1 to carry out some simulations. When I do typical DC simulation and print the oprating points I do not see the value for gate resistance . Why is this happning? is there no gate resistance in SOI...
    Posted to RF Design (Forum) by nadroit on Mon, Jul 18 2011
  • Re: RE: Optimization of Matching Network in Cadence

    Hi Tawna Thanks for the reply. I know how to do .sp analysis with ADE XL. I was trying to use optimization in ADE GXL (local and global) to tune the values of L and C in L matching network. I could run the simulation with out errors but GXL did not give me optimized values. I searched the GXL documentation...
    Posted to RF Design (Forum) by nadroit on Thu, Jul 14 2011
  • Optimization of Matching Network in Cadence

    Hi All As a part of understanding how to optimize matching networks in cadence I am designing a matching network to match 10 ohm load to 50 ohms source at 6Ghz. I am using simple L matching network and I know all the equations required. I come up with the required values of L and C. Simulation shows...
    Posted to RF Design (Forum) by nadroit on Tue, Jul 12 2011
  • fast transmitter simulation

    Hi, I am running the transient analysis on a polar transmitter in which the envelope and phase signals are separatedly amplified. the purpose of this simulation is to get the time domain data based on which I can estimate the spectrum of the transmitted signal. Is there any way I can speed up...
    Posted to RF Design (Forum) by whlinfei on Wed, Jun 8 2011
  • NPORT: mismatch between number of noise parameters and number of ports

    I am using Cadence IC 6.1.3. I have a problem simulating the specific attached touchstone file using the nport component. After netlisiting, I get the following error *** START error **** ERROR (SPECTRE-10008): "xxx/sqvco8_xcouple.s8p", line 163: Error:Mismatch found between number of noise...
    Posted to RF Design (Forum) by elbadry on Wed, Apr 6 2011
  • spectrum analysis of RF power amplifier output

    Hi, I am using cadence icfb version IC5.1.41 and process 65nm to design a RF PA. I have finished my design and did transient analysis. In time domain the signal can be plotted but I was unable to view the output spectrum using DFT function. Can someone help ? is there any particular point...
    Posted to RF Design (Forum) by whlinfei on Tue, Apr 5 2011
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