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Recent content by ee_ykhab

  1. E

    How to determine SNDR using simulink ?

    in your simulink model, add work space and stored all your points @ fs. After it, do fft and calculate SNR using signal power / noise power
  2. E

    Help, simulation of PLL's phase noise

    site:www.edaboard.com pll for example, you know the H(S) for oscillator = 1/(1+Ao(s)) where Ao(S) is the open loop gain of the PLL. next step find the phase noise of oscillator Nvco(S) , you can simply use the math. equation to represent it. Then you Phase noise Lvco(S) = Nvco(S)/|1+Ao(S)|^2...
  3. E

    Phase noise simulation PLL in simulink

    phase noise su simulink Dear Sadegh.j, If you refer to Simulink, you can refer . or try https://www.mathworks.com/matlabcentral/fileexchange/14868 For Matlab code, you need to key in your behavior model equation. thanks ee_ykhab
  4. E

    Phase noise simulation PLL in simulink

    noise simulink Dear, Any one has the phase noise simulation samples for PLL in simulink? Thanks ee_ykhab
  5. E

    opamp by gm/Id approach

    actually your current is extremely small. 1uA is normal in typical design. remember : gm / Id = 2/vdssat. When you increase gm, you need to increase Id 2. Thanks
  6. E

    What is STI and why we use dummies to avoid it?

    Re: what is STI ????? Additional pdf for reference ( highlight in yellow )
  7. E

    Measure on-wafer circuits

    As the osc. has its own capacitance, I am afraid your ring oscil. output cannot drive its load.
  8. E

    MOS Varactor Cap dependance upon Vth

    varactor cap Dear, Hope that "MOS VARACTOR STRUCTURE WITH ENGINEERED VOLTAGE CONTROL RANGE" can help you . Patent number 6407412 B.R
  9. E

    What's the difference between PWM and PFM of Buck

    PFM normally has higher efficiency @ light load. PWM normally has higher efficiency @ heavy load.
  10. E

    temparature independent current reference

    You can use the bandgap reference voltage and do VI conversion. Of course, the tempco of the resistor used in VI conversion should match with the tempco of your bandgap reference voltage output.
  11. E

    The overtemp protection and overcurrent protection

    You should take care the inrush current also. Large inrush current will permanently damage your circuit components.
  12. E

    Resources about effects of bulk biased on threshold voltage

    Re: Bulk biased **broken link removed**
  13. E

    The total width does not change properly by changing w or f

    Re: The total width does not change properly by changing w o the cadence version is not match with your PDK.
  14. E

    The difference betwen trickle charger and precharger

    Re: trickle charger Dear Rajeshkumar, I am refering to Li-ion. For Ni-Cad, you can refer https://www.powerstream.com/NiCd.htm or patent with patent number 4806840 or **broken link removed** Thanks
  15. E

    The difference betwen trickle charger and precharger

    Re: trickle charger Precharge : A charging method who charges a long unused or brand new battery. It normally uses a small current to charge the battery until predefined voltage level is met. It happens in the beginning of the charging process Trickle charging : A charging method which uses to...
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