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Recent content by Valiant

  1. V

    the character impendance of strip in the cellalur phone?

    why do the character impendance of strip in the cellalur phone be difined to 50ohm, but 75ohm in digital TV?
  2. V

    Could you give me some suggestions about the test jig?

    I am reading the book-High speed Digital Design written by Howard johnson and Martin graham. There is a test jig for measuring capacitance. In the figure 1.6, when driven by a 2.6-V step input from the source with the DUT diconnected, the nominal step amplitude is 63mV (the scope measures a...
  3. V

    what is the RMS bandwidth, or equivalent noise bandwidth?

    equivalent noise bandwidth all: what is the RMS bandwidth, or equivalent noise bandwidth? There are some express for it. [[The noise bandwidth of a frequency response H(f), or RMS bandwidth, is the cutoff frequency at which a box-shaped frequency response would pass the same amount of...
  4. V

    Some question about SAW filter.

    C37 is used to block DC to SAW filter. So how do i decide the value of C37? whatever is ok?
  5. V

    Some question about SAW filter.

    Everybody: We used a Maxim 2507 transmitter in our cellular phone. There is a Saw filter between VGA and PA. Both the output of VGA and the input of PA are matched to 50ohm on chip. The output and input impendance are also 50ohm. In the reference design, There are two capacitances in the...
  6. V

    What is the tank filter/circuit ?

    what's the tank filter? thanks!
  7. V

    what's gaussian and single-pole exponential decay pulses?

    dear all: what's gaussian and single-pole exponential decay pulses? which differences are there between them?
  8. V

    What's meaning of the |Vmax| and |Vmin| in SWR?

    Re: help about SWR! I think i have attained it. Thanks a lot!
  9. V

    What's meaning of the |Vmax| and |Vmin| in SWR?

    help about SWR! all I'm so confuse of SWR! In the book, It defined SWR as |Vmax|/|Vmin|. What's meaning with the |Vmax| and |Vmin|?
  10. V

    what's gaussian pluses and single-pole exponential decay?

    single-pole exponential decay 3x!

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