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Recent content by johnnyz86

  1. J

    Pros/Cons of different backplane architectures ?

    Are there some general resources (other than spec sheets of boards) to compare the differences between computing formats like VPX, VME, IBM bladecenter-h, etc? I am tasked with doing some legwork what form-factor we should be looking at when buying our processing equipment for a high...
  2. J

    CANbus Message detect fpga

    thank you for the link, seems like an awesome site. I am hoping for compatability with J1939, but the frame formats i've seen often don't include the SRR and IDE in the CAN2.0b extended frame. Which is it?
  3. J

    CANbus Message detect fpga

    vhdl canbus Hello, I am interested in using a fpga to detect various kinds of CANbus messages. Right now I am starting with just detecting the message with all the signals decoded into 0's and 1's. Should I write it in VHDL? I have access to Synplicity DSP, which can use SIMULINK in matlab...
  4. J

    pcb crosstalk/signal integrity analysis

    software crosstalk pcb analysis does anyone have any general guidelines and perhaps some tutorials for routing allegro SI for designing around crosstalk, signal integrity, pcb constraints for timing and manufacturability? my knowlege on the subject: i've taken various E&M courses so i know...
  5. J

    cheap 120Khz sine generator

    in what configuration? i was looking at wien bridge and phase shift oscillators, do you have any opinions on these? edit: so we've changed our project such that i will be providing a reference wave for a phase locked loop so although we still want it to be cheap, it probably needs to be...
  6. J

    cheap 120Khz sine generator

    i'm trying to find a very inexpensive way to generate a 120Khz sine wave to act as a carrier wave for a cheap system. browsing around the internet gives me way too many options.. function generators, op amps, integrators, etc. what is the best and cheapest option? i'm new to circuit design but...

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