Patent ID: 9444472
Filing Date: 2016-09-13
CPC Classification: G06F,H03L

Claim Text:
1. A digitally controlled oscillator comprising: a digital control unit that compensates for a difference between a feedback signal received from an output of the digital control unit and a reference power, and outputs an output power in response to the compensated difference, wherein a power level of the reference power is set in response to a digital control signal, wherein the digital control signal has a first bit location value and a second bit location value, and wherein the digital control unit generates a temporary reference power in response to the first bit location value of the digital control signal, modulates a power level of the temporary reference power, and outputs the modulated power level as the reference power in response to the second bit location value of the digital control signal, wherein the digital control unit further comprises a divider for dividing the output power, compensates for a difference between the divided output power and the reference power, and outputs a compensated value as the output power, the feedback signal including the divided output power, wherein the digital control unit comprises: a comparing unit that generates a first difference value and a second difference value in response to a comparison performed between the reference power and the divided output power; a first multiplier that multiplies the first difference value by a first coefficient; a second multiplier that multiplies the second difference value by a second coefficient; an adder that adds an output of the first multiplier and an output of the second multiplier; and a constant power supply unit that controls a current according to an output of the adder and that outputs the output power; and a power control oscillation unit that receives a signal related to the output power, and generates an output clock having an oscillation frequency in response to the signal related to the output power.