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Recent content by yannsun

  1. Y

    About format a file__

    Hi all, There's a file: 000 001 010 100 If I want to format this file to 0 1 10 100 If this file is very big, how to shorten the process time? THANKS.
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    how to call parameter outside verilog

    Hi all, If a parameter "i" defined in verilog code, but not evaluated, how to call the value outside the code, in SHELL? Thanks. code ------- module any(); define i; // ... ... ... endmodule SHELL ------- set i=$var
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    Question about the beta value in BJT

    hi all, I have a question about the beta value of Bipolar transistor. Is β a constant value ? If β changes, which factors cause it?
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    Confuse on simulation

    Thanks for your time, problem solved. As a matter of fact, PDIO means P+/NWELL diode, one of the pop diode implementaion in CMOS process. Fvm, you are right, the unfinished parameter setup of diode cause the result to be wrongly full wave.
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    Confuse on simulation

    hi all, I try to simulate the classic half wave rectifier circuit with one resistor and one diode by HSPICE, but the result shows voutfollows vin, i.e. there is no effect of the diode switch function during the vd variation. What i am confused and also want to know is whether HSPICE can properly...
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    What are layout symbols used for?

    hi, Many character or digital symbols, such as "150a", appear inside the chips layout. They offen seems to locate at four corners, using full range of layers from diffusion one to top metal one. What is that used for? Plus it is not the one for the company logo.
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