SPUR AND IMAGE SUPPRESSION IN A RADIO FREQUENCY SIGNAL GENERATOR

A device comprises a radio frequency (RF) signal generator and a calibration system. The RF signal generator is configured to upconvert a baseband signal to an RF signal using first and second LO signals. The RF signal generator comprises first and second signal paths to process first and second differential signals. The calibration system comprises calibration control circuitry and actuator circuitry. In response to digital control signals generated by the calibration control circuitry, the actuator circuitry is configured to: inject currents into the first and second signal paths to adjust offsets of the first and second differential signals, and to balance amplitudes of the first and second differential signals; and adjust at least one of respective duty cycles of the first and second local oscillator signals, and a phase difference between the first and second local oscillator signals.