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Pls let know ,how much can be 45 nm transistor's Early voltage ? otherwise how much can be Output impedence of 45 nm Transistor if it is operating at 1uA bias current and in saturation region with 100 mV Overdrive?
Thanks
This is 10GHz PLL in 65nm And Timing jitter < 0.2 pS .It has 10GHz LC VCO .At 10GHz Tank Q is less than 4 .Only option is going ahead with wide band PLL.Analysis shows required PLL bandwidth should be around 10MHz @ 156.25 MHz reference frequency.
Since frequency dividers already working at its...
Yes .... I want to say Icp*R is the ripple on Vcntl under locked condition. 2.5v is the highest ripple charge pump can handle with out going to triode if Charge pump operates with zero overdrive and steady state value on integrting Cap is zero.
Can anybody help how to increase PLL bandwidth...
This equation is almost correct if
PLL is either critically damped or Overdamped.
PLL loop bandwidth is 20 times less than Loop Update Frequency (Fref)
Icp*R is the jump on Vcntl when either of charge pump (UP or DOWN) are on .
one situation happens when UP/DOWN currents are not equal...
Hi ,
To design a wide band PLL ,is it only way to Increase Kvco ?
PLL Band width : ( Icp * R * Kvco )/2*pi
In order to not push charge pump to triode region (Icp * R) should not exceed max 2.5 v if PLL Operates on 2.5 v .Only way is to increase Kvco as this equation shows
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