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Recent content by 19910219

  1. 1

    to realize low pulse duration using Inverter and XOR gate in FPGA

    yes,but based on my knowledge, it's a on chip design. I'm unable to do in this way..
  2. 1

    to realize low pulse duration using Inverter and XOR gate in FPGA

    Yes, That's a good way. However, a new problem's coming. Could you give me some hint for solving it? I tried to use FPGA to generate a pulse as an input to a PCB design. The design is an amplifier using BJT transistor. But less than 0.7 V pulse can be transmitted to the board. How can I amplify...
  3. 1

    to realize low pulse duration using Inverter and XOR gate in FPGA

    Hi, for testing another circuit, I have to generate pulse with 1ns pulse width. My basic idea is to input 2 signals into Xor gate. one is origin signal and another is delayed signal. I think the delay can be realized by several inverters. I use Spartan 3E which has 50Mhz internal clk source...
  4. 1

    [SOLVED] Assura LVS errors about Unmatched Schematic Instance

    I'd like to update this case. Indeed, i don't know the reason that part of devices are not recognized in schematic view while I generate layout devices automatically( from schematic view) in layout view. However, I tried to create a new project and new schematic ( re-draw the schematic I...
  5. 1

    [SOLVED] Assura LVS errors about Unmatched Schematic Instance

    Thanks for your reply. However, I'm still confused. As you said, there's a device is not showed in schematic. But, I think it shows...Also, I can find it by click the device in layout ( and the device in schematic can be selected in the same time)..Also, the device name's showed in Navigator...
  6. 1

    [SOLVED] Assura LVS errors about Unmatched Schematic Instance

    HI folks. I'm new for layout design and I'm facing the problem about Unmatched Schematic instances in LVS. I generate every single MOSFET by "selected from source" and a part of them is on this problem. I checked every pins of them and I thought they are all right. And When I click" ZOOM" in...

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