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Recent content by zigzagfish

  1. zigzagfish

    How to convert EVCD file to VCD file?

    evcd file Hi Experts, Do you know how to convert EVCD file to VCD file? For EVCD file, it is more complicated so I do not know how to finish the conversion. For example, how to mapping the following lines, p0 6 0 p1 0 6 pX 6 6 ... Thank you
  2. zigzagfish

    VCD to ATE vector conversion

    Hi sparso, for Verigy, they have a tool called ASCII Inteface, which can help to convertion. But you still need to convert your own vcd tool to some intermediate tool which can be viewed by ASCII Interface
  3. zigzagfish

    Digital or Analog Modulator and Demodulator?

    Digital or Analog Modulator and Demodulator? Hi, all, I am plan to design a Modulator and Demodulator chip with a CMOS process for the application of IEEE 802.15.4(Zigbee), my question is, 1. which modulation should I choose, GFSK, QPSK or sth else? 2. which kind of MoDem should I...
  4. zigzagfish

    Digital or Analog Modulator and Demodulator?

    Hi, all, I am plan to design a Modulator and Demodulator chip with a CMOS process for the application of IEEE 802.15.4(Zigbee), my question is, 1. which modulation should I choose, GFSK, QPSK or sth else? 2. which kind of MoDem should I choose, Digital or Analog? Thank you!
  5. zigzagfish

    Error in HSpice (.option post = 2 )

    questions about hspice hi there is the error .option post = 2 and some mistakes occur "=" what is the problem? 3x
  6. zigzagfish

    Confusions about sdd in ADS

    ads sdd i got a hspice file which have contents below: .subckt n18_ckt_rf 1 2 3 4 C1 1 2 C='pwr((1+abs(V(1, 2))/0.7), -0.346)' C2 3 4 C='pwr((1+abs(V(3, 4))/0.7), -0.346)' when i try to import it to ADS,it have error reports: Unable to set repeating parameter: SDD...
  7. zigzagfish

    i have the lib for Hspice how can i apply it to ADS

    the foundry has supplied the lib files for Hspice , but i would like to use it in ADS? help me , thankyou
  8. zigzagfish

    bandwidth drop with cascaded limiting amplifier

    of cos when you cascade the 5 the same amps, whose main poles would be the same and aroud 10G as well as other coresponding poles, the overlapping of the poles would decrease the bandwidth significanly, you can see it clearly from the frequency response graphics
  9. zigzagfish

    what is BE diode & GM diode ?

    gm diode hi would you like to tell the what is the BE diode & GM diode? i just suffer the problems from a friend. 3x
  10. zigzagfish

    How to design analog circuit desiging

    i have read a few books like razavi or gray, but what is the next step?

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