how to implement reset circiut for pll

[lovelonghair]

I want tot design a reset circuit for a pll,it is used to delay the power on,can somebody give me some advice or paper ,thanks very much

 

[Vamsi Mocherla]

You can connect simple pull down transitors to each alternate stage of your VCO. The other stages can be pulled up(in case your stages are inverting). Then when RESET=1, all are pulled to ground.

 

[jerryhuang]

what 's the name of this kind of circuit?

 

[kjjian]

Power On Reset