Radio frequency integrated circuit supporting carrier aggregation and wireless communication device including the same

A radio frequency (RF) integrated circuit configured to support carrier aggregation, the RF integrated circuit comprising:

• a plurality of first receiving circuits configured to connect to a first antenna;
• and
• a first shared phase locked loop circuit configured to provide a first frequency signal of a first frequency to the plurality of first receiving circuits,
• wherein at least one of the plurality of first receiving circuits is selected based on a carrier aggregation type to receive an RF signal from the first antenna,
• wherein one of the plurality of first receiving circuits comprises:
• an analog to digital converter (ADC) configured to convert the RF signal received by the one of the plurality of first receiving circuits to a digital signal by using the first frequency signal;
• and
• a digital conversion circuit configured to generate a digital baseband signal by performing frequency down conversion on the digital signal,
• wherein a sampling rate of the RF signal of the ADC is determined according to a band group corresponding to the RF signal, and
• wherein the ADC comprises a plurality of ADC circuits, each configured to receive the first frequency signal and configured to perform a sampling operation by providing the RF signal with a time difference to at least one ADC circuit among the plurality of ADC circuits based on the band group corresponding to the RF signal.