Patent ID: 9236960
Filing Date: 2016-01-12
CPC Classification: H04B

Claim Text:
1. A calibration circuit for calibrating a plurality of harmonics in a mixer, the calibration circuit comprising: a radio frequency (RF) signal path configured to (i) receive an RF signal corresponding to an output of the mixer, (ii) selectively receive a test signal injected into the RF signal path, wherein the test signal corresponds to a single harmonic selected from the plurality of harmonics in the mixer, and wherein the single harmonic is iteratively adjusted until each of the plurality of harmonics is selected, and (iii) provide feedback to the mixer according to the RF signal and/or the test signal injected into the RF signal path; a measurement circuit configured to detect, in the output of the mixer, the test signal injected into the RF signal path; and a calibration module configured to (i) receive a feedback signal indicative of the test signal detected in the output of the mixer and (ii) based on the feedback signal indicative of the test signal detected in the output of the mixer, adjust a duty cycle associated with the mixer to calibrate the selected harmonic.