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Recent content by kaixi

  1. K

    Class E power amplifier operating at 13.56Mhz

    but vfone, the vout is actually half of the Vin ( which is Vg)... i've attached another tuned circuit.. btw which industry are you in? ---------- Post added at 12:03 ---------- Previous post was at 11:58 ---------- hi, this is the tuned result.. is it correct? Somehow the Vout is almost...
  2. K

    Class E power amplifier operating at 13.56Mhz

    hi vfone, could you interpret anything from the output graph? ---------- Post added at 08:22 ---------- Previous post was at 07:07 ---------- the input is at Vg and the output should be Vout as tagged at the wire right? Voltage gain of amplifier should be taken as Vout/Vg
  3. K

    Class E power amplifier operating at 13.56Mhz

    thanks vfone. how do we judge if the power amplifier is performing correctly? can we just judge from any amplification from Vout (output taken at rload) / Vs (example sine input at the gate input). Please also correct me if i am wrong.. 1) based on the irf510 datasheet i need at least a...
  4. K

    Class E power amplifier operating at 13.56Mhz

    A capacitor placed in parallel will bring down the total capacitance or it will bring up the total capacitance as such total cap seen at Cds is Cd+MOSFET internal Cap? pardon this question but i was in fact looking around for this answer..
  5. K

    Help me find a suitable RFID reader amplifier

    hi, anyone able to tell if we are able to judge the power amplifier performance by looking at the Vout/Vin? any valid links for the IRF510 as a class e power amplifier? Thanks in advance.
  6. K

    Class E power amplifier operating at 13.56Mhz

    hi vfone, thanks for your files. i already have the papers..they are useful but how do we calculate the resonant frequency for the series LC? For the series LC at load arm that is to resonate at f0 = 13.56Mhz, I can just calculate based on XL = XC which eventually get W0 = 1/sqrtLC right? The...
  7. K

    13.56MHz PA for RFID reader reference design.

    hi, the transistor is irf510. vgs is min 2V and max 4V at room temp. the Vgs maximum threshold is +-20V
  8. K

    Class E power amplifier operating at 13.56Mhz

    Hi does anyone has idea on designing a Class E power amplifier operating at 13.56Mhz? The series LC should match the input frequency. How about the value of L at drain and shunt C value? For single ended design, the component should only include series LC, L at drain and shunt C across drain...
  9. K

    13.56MHz PA for RFID reader reference design.

    13.56MHz Class E power Amplifer hi , anyone has idea on how to simulate a class e power amplifier efficiency working with 13.56Mhz frequency, using ADS? attention should be paid to the Vout/Vin or power efficiency or just the S paramters?
  10. K

    MATLAB codes for CDMA multi user detectors techniques

    Dear all. is there any kind souls out there who have access to matlab codings for CDMA receivers? need to do a comparision on matched filters and linear multi users detectors.. Urgent help required. thanks [/img]

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