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Recent content by alchen77

  1. A

    CMOS Bandgap: Effect of BJT's low 'beta' and high base res?

    Re: CMOS Bandgap: Effect of BJT's low 'beta' and high base r if we use the BJT like a diode why not use the pure diode?
  2. A

    why only use diode for negative temp in bandgap ??

    but is there any design concern or silicon result are bad ??
  3. A

    why only use diode for negative temp in bandgap ??

    Can we use diode connected MOS to replace the diode ??
  4. A

    ask help for cadence ADE stimulus file problem

    cadence ade stimulus file *Error_Message: Invalid command character following '[' in: '[ 0 0 1u 2 ] type=pwl '. si:simin didn't completely suessfully *Problem: I am trying to simulate my design using a text stimulus file in spectre. I included this file in the Stimulus File field via...
  5. A

    How to improve duty cycle in an oscillator at 1 MHz?

    Re: Improve duty cycle this is a standard solution and work very well
  6. A

    Transistor and current ratios

    maybe model use a LUT, the MOS size you used maybe located in different block
  7. A

    Years of experience in IC-level analog design

    Maybe I am not a very good designer but I can fell that I become stronger than before year by year because the project and process will change and I need to do more also.
  8. A

    A great Offer for Egyptians

    I don't know what is this?? I never see this kind of book. Can someone explain me is it helpful for designer?? If yes. Is there any volumn for CMOS?? thanks alchen77
  9. A

    how do I calculate the current in a cascode current mirror

    not having currrent means work Maybe you take some example that 1V technology use this kind of circuit?
  10. A

    Where can I find example projects on analog circuit design?

    where can I find? I think you know the analog design knowledge. If you real want to practice one project you can find the datasheet which kind of circuit you like and reference to some papers or books or patents to do the practice you want.
  11. A

    how do I calculate the current in a cascode current mirror

    1. I don't think this circuit can work in 1.8V. You have 3 diodes but only 1.8V that mean all the MOS threshold voltage needs to less 0.55V in slow corner. 2. If the Vth is not the problem, the PMOS should be connected like CS not diode. because in your case, the current will dependent on the...
  12. A

    I need to learn how to use the mcu!

    I have learned the C and basic language but it's long time before. Added after 2 minutes: sorry, I can't find this website. Can you check the address, thanks. alchen77
  13. A

    Determining parameters from BSIM model

    bsim4 transistor parameters I find the beta parameter in spectre simulation result browser. if this is the same as the Kp or Kn?? I calculate the result it seems the same. - alchen
  14. A

    I need to learn how to use the mcu!

    microchip pic primer pdf I need to start to learn about the mcu by my self Can someone give me a suggestion how to start? or some lecture or books or datasheet I can reference. I never touch about this field. My purpose is to use well and know how. I don't need to design. thanks
  15. A

    The problem about current mirror

    do you check the VDS is the same also ?? the VDS is also a parameter in the current equation.
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