raja.cedt
|
hello,
I am working for 1.8G pll for DDR3 purpose. I am getting around 14g kvco in ff corner, can any one please suggest which one shoud i change to reduce this. The following is my understanding on this cell
1.If i increase triode device(which is controlled by Vcontrol) i am getting more Kvco with extended range means usable control voltage range is also increased. 2. if i touch diode connected load i am seeing less kvco increment but entire range got shifted. 3. Differential pair devices are not giving much frequency range variation.
Thnaks, Rajasekhar.
|