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Type: Posts; User: farrokhiyan

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  1. Closed: STM32- F103 model I2C different result in Debugger vs Run

    Hi friends,

    I'm working on data exchange between my stm32-F103 and atmel AT24C02 serial EEPROM on my starter board. I have did the programming based on I2C peripheral and DMA. the pull ups are 4.7...
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    Closed: Re: Fiber IGBT HCPL316j gate driver

    Hi vermes,

    would you please send me a schematic view of your IGBT gate driver by HCPL 316J you have upladed in Aug 2011. It seems interesting for me.

    Thank you so much.
    Farrokhiyan.
  3. Closed: Re: question on telephone line interface circuit

    Dear goldsmith,
    frankly I've noticed that it can be a snubber but the way it is being used can provide a path for ac voltage of ring signal that was my second question.

    Dear Betwixt,
    the...
  4. Closed: question on telephone line interface circuit

    Dear friends,

    the below image shows the line interface of a dial up modem. the DC loop, ring detector, isolation transformer and hook relay are clear. the question is what does the RC circuit...
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    Closed: autocorrelation

    dear freinds,

    what is your evaluation from this autocorrelations of two signals. the important for me is the amplitude of the noisy samples between the repeated samples. neglecting the high...
  6. Closed: gclkiob

    How can I instantiate a Clk signal to a standard I/O buffer (not global buffers)?
    what is CLOCK_DEDICATED_ROUTE ?
  7. Closed: clock_dedicated_route

    Hi all,

    Would you please tell me what is the difference between standard I/O Buffer and Global Clock I/O buffer?

    how can i explicitly instantiate an I/O Buffer component for each top-level I/O...
  8. Closed: Re: High-Order Sigma Delta (for DAC) or EF Sigma-Delta

    Hi,
    I am also designing a 2nd order EF structure by VHDL. I've Read Mr. Peter's theory and I agree with you. I'm not sure yet. The structure adders show overflows but I don't have any idea about...
  9. Closed: Re: Need IEEE Paper

    The link which you mentioned was removed.
  10. Closed: Need IEEE Paper

    Hi all,
    Would you please send me this paper:
    Accurate VHDL-based simulation of ΣΔ modulators
    Castro-Lopez, R.; Fernandez, F.V.; Medeiro, F.; Rodriguez-Vazquez, A.
    Circuits and Systems, 2003....
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    Closed: need a simple source code

    Hi all,
    I'm a beginner in vhdl. i need a simple source code for digital integrator in vhdl which is synthesizable on FPGA. can you help me?

    tnx.
  12. Closed: Need formula for sigma-delta modulator

    Hi,
    I need a formula of sigma-delta modulators, which makes relation between these parameters:

    1- Input signal Amplitude,
    2- Order of modulator,
    3- Number of levels of the Quantizer,
    4- OSR
    ...
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    1,402

    Closed: Re: Data converters SNR Calculation

    Hi fxnviri,
    could you clear the link ?

    tnx
  14. Replies
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    1,402

    Closed: snr calculation

    Hi all,

    Can anyone provide me the methodology for Delta Sigma ADC/DAC SNR measurement in simulation?
    I used SD Toolbox from Mathwork, but i didn't get the true answers. i'd like to measure SNR...
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    Closed: Help on this Block of SDtoolbox

    Hi,
    could you tell me what is this block in SDtoolbox,please?
    is it as same as a quantizer?
    how does it work? what is the DAC and ADC output lines? what is the usage of ADC line in an...
  16. Closed: audio restoration

    Hi dear friends,
    I need to know something about signal restoration. i have some distorted audio samples by severly filtering and background noise and i need to restore them by matlab. can anyone...
  17. Replies
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    Closed: delsig.zip

    I don't think so. the providers in the pdf document presented in delsig.zip, say:

    "The Delta-Sigma toolbox requires the Signal Processing Toolbox and the Control Systems Toolbox."

    Or

    in the...
  18. Replies
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    Closed: delta matlab

    Hi,
    I need delta-sigma modulators simulation . I downladed 3 different toolboxes from matlab file exchange center. but i don't know what differences they have. they are :

    SDtoolbox,

    delsig,
    ...
  19. Closed: Re: is Post Layout Simulation necessary for 0.35 process ana

    hi

    There isn't any force on you to do the post simulation. this depends on you if you want to get the more precise results.

    regards
  20. Replies
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    Closed: Re: help me choosing antivirus

    hi

    If your computer is standalone (or have no internet connection), i suggest you "Antivir" which you can find on (it's free) :

    www.free-av.com

    i think it is the best !!
    ...
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    Closed: Re: Question in VHDL

    Hi

    Please see this file. it describes what you want. also other features of VHDL. search the file for "ATTRIBUTE" and "ALIAS".
    it includes helpfull examples.

    regards
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    Closed: Re: S-parameters measurement

    Hi dear friend

    See this note:
    if this note can't help you i think if you refer to your analyzer manual, you can find helpfull information. or search internet for yor analyzer type and measuring...
  23. Closed: Re: What define Cgb Cdb in hspice simulation? Help!

    Hi dear friend
    You can specify device characteristics for default values. you can see more information in hspice manual. the default values are determined in technology file.

    See this picture :
    ...
  24. Closed: Re: Which transistor is eqvivalent to BC149C?

    Hi

    you can use BC109C, BC209C, BC549C or BC550C (the last, the best). In the american family, the 2N5818 is a good and easy choice.
    i think the "BC549" is the best choice.

    thnx

    This...
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    Closed: Re: S-parameters measurement

    hi
    it is not easy to measure s parameters in lab bye regular instruments. you need spectrum analyser. it is a precise measurment. for some information please study following note.

    deleted. free...
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