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Recent content by selvaraja

  1. selvaraja

    Hysterisis measurement

    example ( assume IN= input Y =ouput) Vinput IN 0 PWL ( 0 0 0.5s VSUPPLY 1s 0) then measure statement to find hysteresis .measure tran v_padh find V(IN) when V(Y)='VSUPPLY/2' TD=0s .measure tran v_padl fin V(IN) when V(Y)='VSUPPLY/2' TD=0.5s .measure tran HYSTERIS PARAM='v_padh-v_padl'
  2. selvaraja

    Guidelines for I/O pad simulation

    Re: I/O pad simulation generate TLP pulse the simulate esd event
  3. selvaraja

    How to generate random signal in Hspice?

    .param tdrate=400e6 $ Data rate in Gbps .param trfx=200ps $ Rise/Fall time .param vlox=-0 $ Input voltage 'low' .param vhix=eas_vdd $ Input voltage 'high' .param dperc='2/tdrate' $ Eye Period (2*Data width) .param perx='1/tdrate'...
  4. selvaraja

    Have you ever seen this bandgap circuit?

    i have seen this architecture before let me find it upload it later
  5. selvaraja

    about bjt current in bandgap reference

    dp dc sweep for bjt find the optimum current going to bjt for particular forward voltage
  6. selvaraja

    What's the normal permittivity and conductivity of P-substrate of CMOS technology?

    Re: P-substrate it depends on the substrate u wrkin on whether lightly doped or heavily doped substrate.
  7. selvaraja

    Use of Dummy Metals in Layout

    is used for sheild signal from noisy enviroment and the dummy must connected to ground.
  8. selvaraja

    which linux platform is good for EDA?

    fedora 8 in X86_64 platform
  9. selvaraja

    frequency of op-amp in bandgap reference

    depends on your system also. but narmally few kilo hertz will do.
  10. selvaraja

    Why all ICs have black color?

    Re: why IC are black? ic made of silicon..
  11. selvaraja

    LVDS transciever interface with BGR

    use separate power supply ground pins for both
  12. selvaraja

    Zeni & Virtuoso comparison

    hi i have used both tools ...even used to delevop PDK for zeni. I will say Virtuoso more stable but zeni more user freindly.
  13. selvaraja

    Isolation between analog and digital power lines

    use N+ring guard ring for digital circuits and P+ring for analog circuits.
  14. selvaraja

    Substrate current effect

    substarte current is form of noise ...they callled substrate noise.
  15. selvaraja

    how to simulate the s-parameter!

    may i know power amplifer for wht application ...is it for RF
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