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Recent content by irata

  1. I

    best book for RISC arch

    Maybe this is a very good book for RISC processor Guide to RISC Processors-for Programmers and Engineers by Sivarama P. Dandamudi springer you can download it from www.gigapedia.org best regards!
  2. I

    Auto selection of internal/external frequency reference

    Thanks. You misunderstood my meaning. This PLL is used in an instrument generate clock with referece to either an internal or external reference. By default the PLL is using the internal freq ref which is an OCXO ,but if the user connect an external 10MHz freq referece on the external ref port...
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    Auto selection of internal/external frequency reference

    Thanks for all of you. I need an circuit that could work,because My design is very tight so i have no choice to try again. Many thanks.
  4. I

    Auto selection of internal/external frequency reference

    internal external reference oscillator selection I am designing an PLL circuit which have an internal and external freq reference. The PLL use the internal freq reference if there were no signal detected on the external reference connector, else use the external reference. the internal freq...
  5. I

    how to compile files in a library (Xilinx)

    you can use "compxlib "to compile xilinx library. compxlib -s <simulator> -arch <arch> [-l <language>] [-lib <library>] [-dir <output_dir>] [-w] [-log <log_file>] [-p <dir_path>] [-smartmodel_setup] [-verbose] compxlib -cfg compxlib -info <dir_path> compxlib...
  6. I

    UART verilog for shift register

    Re: UART verilog here are an simple example.
  7. I

    SFP Transceiver MultiSource Agreement (MSA)

    MSA OF SFP What this ?
  8. I

    How to caculate the necessary sampling time of a SHA?

    about sampling time you mean the time used to sample or the sample frequence? if it is the sample frequence, is at least two times the signal freq by Shannon law.
  9. I

    Ebook or elearning basic guide ( R,L,C,diode,Transistor,IC)

    Can you help me? your mean practice circuit or theory? for practice,this book is very valuable for you. TITLE:The.Circuit.Designers.Companion AUTHOR : Tim Will
  10. I

    What's the function of diode bridge in analog front-end circuit?

    Re: About a Diode bridge This circuit is an analog front-end circuit of an instrument. the front-end circuit should work to about 500MHz. I thought it is for isolation ,but i don't sure about it. I am an begginer of analog front-end circuit, so there are many problems. thank you very much.
  11. I

    What's the function of diode bridge in analog front-end circuit?

    I have this Diode Bridge in an analog front-end circuit, I want to know what does this Diode bridge do, and why there is such a diode brigde in the signal path. thanks very much!
  12. I

    A strange Circuit, look for an explanation of it.

    Thank you very much. I got it now. I had always thought it is an multivibrator, now i anderstand it only an positive feedback of Q1, Q2 is only an fellow. thanks again.
  13. I

    A strange Circuit, look for an explanation of it.

    I also see an oscillator of about 65MHz, the wave is very like the simulation result. the problem is i don't know why this circuit oscillate.
  14. I

    A strange Circuit, look for an explanation of it.

    Nobody Know?
  15. I

    A strange Circuit, look for an explanation of it.

    A have a simulation result as this pics depicts.
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