I am developing a charge pump PLL. If I am using the charge pump circuit in Razavi's book. how can I realize the two gate voltage of the current sources? Shall I use voltage reference?
I am developing a charge pump PLL. If I am using the charge pump circuit in Razavi's book. how can I realize the two gate voltage of the current sources? Shall I use voltage reference?
NO, gate voltage is detemined by the Id of it. You should design current bisa. After you have a constant (some range) current, use current mirror as the current source.