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Recent content by lovexxnu

  1. L

    How do I set a good static work point to a fully differential telescope OPAMP?

    for fully differential OPAMP, you need common mode feedback to adjust static operation point
  2. L

    help : i dont know how work one subcircuit in low noise amplifier with bipoar process

    why the voltage at the drain of NM0 is 2Vbe? I think the current is decided by I0, Q0 and DZ17 are current mirror. could you say some more about the independent current or provide some reference? does it generated by NM0 and the Vbe? I did little on this kind of circuit. thank you
  3. L

    Which component to detect any changes on analog circuit?

    does some DAC work for this? maybe you could use the DAC to monitor the voltage and use some microcontroller to program.
  4. L

    help : i dont know how work one subcircuit in low noise amplifier with bipoar process

    This part is just to provide a DC operation point, works like current mirror and use the buffer (opamp) to insulate the two BJT. it's not related to the independent temperature, actually there is no independent temperature current generated. ---------- Post added at 18:13 ---------- Previous...
  5. L

    two stage OTA design for typical LDO with 0.13um tech

    hi, according to your description, you are working on the 13.56M RFID, right? If it's a passive RFID Tag, the regulator is much better than LDO, and 1mA current is quite huge for passive RFID. the psrr and sr depends on your application, you need to consider the load circuits first, then go back...
  6. L

    Monte Carlo Analysis - Process gradients on a chip

    This depends on the resolution of your DAC and the variation of the resistor. you can find in the fab's document. if you don't use the central symmetric, add some dummy at least.
  7. L

    how to analyse this circuit?

    yes, this is constant current sink. the current depends on the Re
  8. L

    How can I make a 50Ω output buffer using cadence?

    50 ohm Output buffer! why do you need output impedance ? what you really need is S22, I think.
  9. L

    How width of the metal I need

    The basic requirements is inclued in DRD, if it is the digital, the width of metal 1 should be the same with the metal in standard cell, in analog, IR drop should be taken into consideration.
  10. L

    I need help on these two papers!!!

    hi, thanks I'm a fresh here :)
  11. L

    Question about the current mode filter

    what is current filter? I have never heard it.
  12. L

    substrate connection of cascoding device

    it depends on the application. sometimes it is more convenient to connect to gnd for layout.
  13. L

    How to get a precise vdd/2 voltage?

    rfsystem's reply is great Added after 52 minutes: rfsystem's reply is great
  14. L

    I need help on these two papers!!!

    who are so kind to provide me these two papers, I can not find and download them. these are both about LNA, I found them on a lecture, but it did not mention the exact name. Bevilacqua, ISSC 2004, C.-W. Kim, JSSC 2005
  15. L

    efficiency of DCDC power management

    Hi, who know what is the mainstream efficiency of DCDC power management? I ever found some productions which is higher than 98%, I wonder what is the mainstream now and what is the goal for the industry of power management. Thanks!

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