Re: ADC "stacking"

On Fri, 7 Apr 2006 16:22:10 -0500, "Abstract Dissonance"
<Abstract.Dissonance@xxxxxxxxxxx> wrote:

is it possible to run ADC's in parallel to get increased sample rate?

Interesting thread (I've read it all). I recall about eight years
ago, a coworker was working on a digital RF receiver with a bandwidth
of around maybe 50 to 70 MHZ. recall discussing the idea of using the
ADC chips interleaved for higher bandwidth, and also that the data
sheet saying interleaved used was not recommended (I don't remember
the A/D chip used), but it didn't say why. Would anyone know why it
would say this, other than the diffuculties already discussed in this
thread?

I.e.


Signal ----+--> ADC1 ------------>
|
+-- Delay --> ADC2 --->


so each ADC runs, lets say, at M mhz and Delay is a delay of 1/(2*M)
seconds. So in a sense ADC2 samples "inbetween" what ADC1 samples. This
would effectively increase the sampling rate by 2? I'm sure that the delay
would have to be designed almost perfectly so that no distortion would arise
because the samples would be expected to be equally spaced?


Thanks,
Jon


.

Relevant Pages

  • Re: ADC "stacking"
    ... a coworker was working on a digital RF receiver with a bandwidth ... of around maybe 50 to 70 MHZ. recall discussing the idea of using the ... ADC chips interleaved for higher bandwidth, ... support much more bandwidth than that needed for its maximum conversion rate. ...
    (sci.electronics.design)
  • Re: What application requires 500MHz for embedded processors
    ... CPUs increase the width of buses instead. ... This tells me you have never actually done any DSP programming. ... long as you've got enough bandwidth. ... minimal delay and NO non-deterministic delays or stops, ...
    (comp.arch.embedded)
  • Re: maximum visits to a web site or page at same time
    ... Bandwidth is an old analog term. ... In the old telephone world echo was not a problem on shorter connections, because even if the echo was "relatively loud", it was happening almost in sync with what it was echoing, so the brain didn't notice. ... On longer calls the delay made the echo separate itself in time from the original. ...
    (alt.html)
  • Re: measuring distance between two cars using infrared circuits
    ... >> has infinite bandwidth, so that doesn't really help us. ... It is not difficult to turn on a low power transmitter in a millisecond. ... measuring a ns delay can be somewhat challenging in a digital ... high bandwidth switch between it and the antenna. ...
    (sci.electronics.design)
  • Re: measuring distance between two cars using infrared circuits
    ... >> has infinite bandwidth, so that doesn't really help us. ... It is not difficult to turn on a low power transmitter in a millisecond. ... measuring a ns delay can be somewhat challenging in a digital ... high bandwidth switch between it and the antenna. ...
    (sci.electronics.basics)