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  • Users: swb1
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  1. swb1

    Online Classes

    Hi, Would anyone recommend taking an online course to learn embedded hardware design? It is being taught at a local university. Never took an online engineering course before and don't know how effective it would be. Thanks, swb1
  2. swb1

    Help for a VME Noobie

    Hi, I need to replace an old VME circuit card due to obselete parts and have no clue where to begin this design. In doing a VME board design, where would you suggest I start? Thanks, swb1
  3. swb1

    Best Way To Generate 2 Clocks - 33 MHz & 64 MHz

    Hi, Instead of using 2 separate oscillators, is there a way to generate both 33MHz and 64Mhz with 1 device?? The values don't divide evenly. Please let me know. Thanks, swb1
  4. swb1

    Best way to generate 2 clocks - 33Mhz & 64Mhz

    Hi, Instead of using 2 separate oscillators, is there a way to generate both 33MHz and 64Mhz with 1 device?? The values don't divide evenly. Please let me know. Thanks, swb1
  5. swb1

    IC Power Consumption

    Hi, How do IC manufacturers come up with a power consumption rating?? How do I check their numbers?? swb1
  6. swb1

    Designing a PCI/VME Bridge

    Hi, Anyone out there have any experience with VME bridges?? I would like to design a PCI to VME bridge using IP Cores in an FPGA device. Looking for the knowledgeable to chime in and give a noobie some tips and things to look out for. Thanks, swb1
  7. swb1

    Analog circuit simulators

    Hi, Anyone know of any inexpensive/free analog circuit simulators?? Thanks, swb1
  8. swb1

    1:1:1 Transformer is outputting 1/2 the Voltage

    Hi, I am using a 1:1:1 transformer and I have +/- 3.25V going in and +/- 1.6V coming out. Why is this?? Shouldn't the voltage going in be the same as the voltage going out?? I have a differential op amp driving the transformer and 0 Ohm series resistors on the + and - output pins of the op amp...
  9. swb1

    Puzzling Pulse Transformer output

    Hi, I am pulsing a 1:1 pulse transformer with a 600 ns pulse and when I send 3 consecutive '1' the pulses on the output satrt to get smaller (about 350 ns). If I send 2 consecutive '1' the pulses on the output are fine. I tried putting a 1N4001 diode across the primary and secondary sides of...
  10. swb1

    Using Analog Switches

    Hi, Has anyone switched between two circuits using an analog switch before? I have 2 serial outputs: one with .6V and another with 3.25V, where I want to allow a user to switch between the two outputs as they wish. Is there a slick way of doing this that anyone knows?? Thanks, swb1
  11. swb1

    How to speed up Fmax

    Hi, I put a timing requirement on my clk signal and after I run through synthesis (VHDL code), I get a warning saying that Fmax could not be met. The part is pretty full (98%) and I can't change the part at this point in time. Any suggestions on how I can speed up Fmax?? Thanks, swb1
  12. swb1

    Help with MOSFETs

    Hi, Using power Mosfet MGSF1N03LT1 (On Semiconductor), the FET takes a long time to turn off (1.2 microsecs.). Why is this?? I need for it to turn off quicker. Any suggestions on different Mosfets that will turn off quicker with the same characteristics as the On Semiconductor part?? Thanks, swb1
  13. swb1

    Polarized vs. Non-polarized caps

    Hi, When do I know when to use a polarized capacitor vs. a non-polarized capacitor?? Is there a rule of thumb?? Thanks, swb1

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