Patent ID: 8217729

Claim:
An integrated circuit comprising: an inductor-capacitor (LC) tank circuit, the LC tank circuit being configured to output an output signal having a peak voltage that is substantially equal to an amplitude plus a direct current (DC) voltage value; and a feedback loop coupled with the LC tank circuit, wherein the feedback loop is capable of determining if the peak voltage of the output signal falls within a range between a first voltage level and a second voltage level for adjusting the amplitude of the output signal, the first voltage level being smaller than the second voltage level, wherein if the peak voltage of the output signal is within the range, the feedback loop outputs no feedback signal, if the peak voltage of the output signal is smaller than the first voltage level, the feedback loop outputs a feedback signal for increasing the amplitude of the output signal, and if the peak voltage of the output signal is larger than the second voltage level, the feedback loop outputs a feedback signal for decreasing the amplitude of the output signal.