Patent ID: 9503101
Filing Date: 2016-11-22
CPC Classification: H03L

Claim Text:
1. A phase locked loop circuit comprising: a first current source that outputs a current from a first output node; a second current source that outputs a current from a second output node; a driving current circuit that includes a first voltage node set at a voltage corresponding to a supplied current and outputs a driving current from a driving current node according to the current supplied to the first voltage node; a current-voltage converter circuit that includes a second voltage node set at a supplied current; a first current switch circuit that electrically connects the first output node and the first voltage node or electrically connects the first output node and the second voltage node; a second current switch circuit that electrically connects the second output node and the first voltage node or electrically connects the second output node and the second voltage node; an oscillator that receives the driving current and changes an oscillatory frequency according to a magnitude of the driving current; and a control circuit that controls the first and second current switch circuits.