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Recent content by ilikebbs

  1. I

    Maximum LDO output current?

    some IC claims that LDO controller is integrated. One output pin is used to control external MOSFET to generate low voltage. so what is the main factor to determine the maximum output current of LDO? Thanks. ilikebbs
  2. I

    big endian vs little endian, how to do data bus conversion

    for example: If CPU has 22 bit address bus a[21:0], 32 bit data bus d[31:0] and it is big endian, Generally we do endian conversion like this. d[7:0] ---- chip_data[0:7] d[15:0] ---- chip_data[0:15] d[31:0] ---- chip_data[0:31] My question is that since the unit for big endian and little...
  3. I

    the function of capacitor between differential signals?

    I attach the sketch map of the circuit. [url=http://obrazki.elektroda.pl/79_1263135503.jpg][/
  4. I

    the function of capacitor between differential signals?

    What is the function of capacitor between differential signals? especially in the clock circuit. Thanks.
  5. I

    Switching power supply whistling ??

    You should replace the power inductor with a big one.
  6. I

    what is happening to the analog design job market in china

    Re: what is happening to the analog design job market in chi You should now that you are over-qualified as an engineer, but not qualified as a manager.
  7. I

    why does SPDIF signal need a transformer?

    I have seen a circuit. It convert SPDIF signal to differential signal. And it connects the differential signal to a connector via transformer. so I do not know why the circuit is designed like this. does the transformer must be needed? thanks,
  8. I

    Is the i2c interface in VGA DB15 connector 5V compatible?

    vga i2c Is the i2c interface in VGA DB15 connector 5V compatible or 3.3v compatible? I remember that most monitor's i2c is 5v compatible.
  9. I

    how to convert altium desingner .pcbdoc file to pads file??

    import pcbdoc file into pads now i have successed to import .brd file into altium designer. the output is .pcbdoc file. How can i convert the .pcbdoc file to pads file? thanks in advance.
  10. I

    how to make crystal work at the third overtone?

    how to make crystal to oscillate penrico, anyway, thanks. I appreciate your help.
  11. I

    how to make crystal work at the third overtone?

    how a frequency crystal works penrico, how to determine the value of inductor and capacitor? according to your equation, the circuit does not work at all.
  12. I

    how to make crystal work at the third overtone?

    third overtone crystal? thanks, but according to your circuit, how can i connect the crystal to IC?
  13. I

    how to make crystal work at the third overtone?

    3rd overtone crystal oscillator rwiggins, I have seed the document already. I think that you also get the document by "google". sure. it is the ansfer for my question. but it is too bad. the circuit is too complex. I hope that it can be simple. BTW, i connect the crystal to IC. Is it possible...
  14. I

    how to make crystal work at the third overtone?

    crystal 3rd overtone i do not want to make the crystal by myself. now i already have one crystal. generally we just need two capacitor to make it works. but now i want to let the crystal works at the third overtone of the frequency. i appreciate that you can help me.
  15. I

    how to make crystal work at the third overtone?

    third overtone crystal could you more detail explanation about it? thanks. it will be better that you can upload some document about it.
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