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Recent content by Boowei

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    Look for a Am IC or circuit

    I find AD835
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    Look for a Am IC or circuit

    Hi flashking, I can't open https://i52.tinypic.com/zvxybt.jpg
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    Look for a Am IC or circuit

    Hi, I am looking for a IC or circuit to AM 150MHz Carrier(<5dBm),AF is 350~2500Hz 400mv .M=0.9 Distortion<1.2%. The output AM signal Distortion<2% who can help me,Thanks.
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    [SOLVED] Help for pushpull amplifier

    Hi fxhfzy Which company do your 25 ohm coax(TL2,TL3) buy from? what is the type? I want to design a pushpull amplifier(30-512MHz,P-1cw=120W).
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    Question about balun, fet is D1009UK of semelab

    Re: Question about balun Thank. How can I calculate the impedance transform of this balun with I and V.or Are there some book or paper about it?
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    Question about balun, fet is D1009UK of semelab

    Re: Question about balun Thank vfone, chaoFan. May you tell me what is the different between this balun and the balun(T4&T5) as following fig? the mosfet is UF28150J of macom.
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    Question about balun, fet is D1009UK of semelab

    Question about balun Hi All, Does anyone know the balun(T2&T3) in the following figure is 1:4 or 1:9. the fet is D1009UK of semelab. Thank. [url=http://obrazki.elektroda.pl/37_1250860689.jpg][/
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    need help to a 1:6 transformer

    Thank VSWR,FVM. I hope to read the book Transmission Line Transformers,May you email the ebook to me? my email is liok802000@yahoo.com.cn Thank. Added after 29 seconds: Thank VSWR,FVM. I hope to read the book Transmission Line Transformers,May you email the ebook to me? my email is...
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    need help to a 1:6 transformer

    1/6 transformer I want to design a high power(200w CW) directional coupler as following circuit,It work over the range from (30~80)MHz. I am going to use a 3:5 voltage ratio transmission-line transformer as a 1:3 impedance ratio transformer. However I don't know how to design 1:6 impedance...
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    What's the function of this part in a RF power transistor ?

    Re: What's the function of this part in a RF power transisto Hi chaoFan As you say shunt L can lower the Q.but what is the function of C3.
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    What's the function of this part in a RF power transistor ?

    Re: What's the function of this part in a RF power transisto Hi chaoFan Can you give me some directly help with email?my email is liok802000@yahoo.com.cn Thank. Added after 50 seconds: Hi chaoFan Can you give me some directly help with email?my email is...
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    How to improve my amplifier's IM3

    Hi chaoFan what is OBO? Thanks. Added after 3 minutes: Hi kspalla Which pre-distortion circuit is suitable for my amplifier? May you give me a circuit? Thanks. Added after 31 seconds: Hi kspalla Which pre-distortion circuit is suitable for my amplifier? May you give...
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    What's the function of this part in a RF power transistor ?

    Re: What's the function of this part in a RF power transisto Hi chaoFan the L-C is inside the package.But I have on idea of how the L-c match the device. Have some book or paper about it？ Thanks.
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    How to improve my amplifier's IM3

    how to improve an amplifier I design a amplifier f:(30-400)MHz Pout:>25W(CW) @IM3<-25dBc The circuit and picture as following: the Mosfets are two MRF9045. the amplifier's IM3=-26dBc@270Mhz@25W(CW) but the amplifier's IM3=-18dBc@400Mhz@25W(CW) How can I improve the IM3? thanks.
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    What's the function of this part in a RF power transistor ?

    Re: What's the function of this part in a RF power transisto Thank vfone.
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