Patent ID: 8120435

Claim:
A phase-locked loop circuit comprising: a voltage-controlled oscillator comprising; a current source unit; a first transistor; a second transistor; and an oscillator circuit comprising a third transistor; wherein one of a source and a drain of the first transistor is electrically connected to a first power supply line, wherein the other of the source and the drain of the first transistor is electrically connected to one of a source and a drain of the third transistor, wherein one of a source and the drain of the second transistor is electrically connected to a first power supply line, wherein the other of the source and the drain of the second transistor is electrically connected to one of a source and a drain of the third transistor, wherein the other of the source and the drain of the third transistor is electrically connected to a third power supply line through the current source unit, wherein a gate of the first transistor is electrically connected to a second power supply line, and wherein a gate of the second transistor is electrically connected to the third power supply line through the current source unit.