# US 2019/0165975 A1 · Radio frequency integrated circuit supporting carrier aggregation and wireless communication device including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0165975 A1 - Document ID: US20190165975A1 - Status: Published application - Kind: A1 - Application number: 16/191,611 - Filed: 2018-11-15 - Published: 2019-05-30 - Earliest claimed: 2017-11-27 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Barosaim SUNG; Chilun LO; Jae-hoon LEE; Jong-woo LEE; Seung-hyun OH - Web page: https://patentgrep.com/patent/US20190165975A1 ## CPC - H04L 27/2272: {using phase locked loops (H04L27/2273 takes precedence)} - H03G 3/3042: {in modulators, frequency-changers, transmitters or power amplifiers} - H04B 1/403: using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency - H04L 27/38: Demodulator circuits; Receiver circuits - H04L 5/001: {the frequencies being arranged in component carriers} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H03G: CONTROL OF AMPLIFICATION - H04B: TRANSMISSION ## Abstract A radio frequency (RF) integrated circuit is provided. The RF integrated circuit supports carrier aggregation and includes first receiving circuits and a first shared phase locked loop circuit that provides a first frequency signal of a first frequency to the first receiving circuits. One of the first receiving circuits includes an analog to digital converter (ADC) and a digital conversion circuit. The ADC converts an RF signal received by the one of the first receiving circuits to a digital signal by using the first frequency signal. The digital conversion circuit generates a digital baseband signal by performing frequency down conversion on the digital signal. ## Claims ### Claim 1 A radio frequency (RF) integrated circuit configured to support carrier aggregation, the RF integrated circuit comprising: a plurality of first receiving circuits; 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 one of the plurality of first receiving circuits comprises: an analog to digital converter (ADC) configured to convert an 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. ### Claim 2 (depends on 1) The RF integrated circuit of claim 1, wherein the first frequency is determined according to a band group corresponding to the RF signal received by the one of the plurality of first receiving circuits. ### Claim 3 (depends on 2) The RF integrated circuit of claim 2, wherein the band group comprises a plurality of band groups corresponding to the RF signal, and the first frequency is determined based on a highest band group among the plurality of band groups. ### Claim 4 (depends on 1) The RF integrated circuit of claim 1, wherein the one of the plurality of first receiving circuits further comprises a frequency divider configured to receive the first frequency signal, divide the first frequency signal, and provide the first frequency signal that has been divided to the ADC. ### Claim 5 (depends on 4) The RF integrated circuit of claim 4, wherein a frequency division ratio of the frequency divider is determined according to a band group corresponding to the RF signal. ### Claim 6 (depends on 1) The RF integrated circuit of claim 1, wherein a sampling rate of the RF signal of the ADC is determined according to a band group corresponding to the RF signal. ### Claim 7 (depends on 6) The RF integrated circuit of claim 6, 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. ### Claim at position 8 8-9. (canceled) ### Claim 10 (depends on 1) The RF integrated circuit of claim 1, further comprising: a plurality of second receiving circuits; and a second shared phase locked loop circuit configured to provide a second frequency signal of a second frequency to the plurality of second receiving circuits. ### Claim 11 (canceled) ### Claim 12 (depends on 1) The RF integrated circuit of claim 1, further comprising: a plurality of second receiving circuits; and a frequency divider configured to receive the first frequency signal from the first shared phase locked loop circuit, divide the first frequency signal, and provide the first frequency signal that has been divided to the plurality of second receiving circuits. ### Claim 13 (depends on 1) The RF integrated circuit of claim 1, further comprising: a plurality of transmitting circuits; and a second shared phase locked loop circuit configured to provide a second frequency signal of a second frequency to the plurality of transmitting circuits, wherein one of the plurality of transmitting circuits comprises: a digital conversion circuit configured to up convert the digital baseband signal that has been received and generate a digital output signal; and a digital to analog converter (DAC) configured to convert the digital output signal to an analog signal by using the second frequency signal. ### Claim 14 (depends on 1) The RF integrated circuit of claim 1, further comprising a plurality of transmitting circuits, wherein the first shared phase locked loop circuit is configured to provide the first frequency signal to the plurality of transmitting circuits. ### Claim 15 A wireless communication device configured to support carrier aggregation, the wireless communication device comprising: a radio frequency (RF) integrated circuit comprising: a plurality of receiving circuits configured to receive an RF signal; and a shared phase locked loop circuit configured to provide to the plurality of receiving circuits a frequency signal of a certain frequency for an analog to digital conversion; and a modem configured to provide, to the RF integrated circuit, a digital reference signal for frequency down conversion of the RF signal. ### Claim 16 (depends on 15) The wireless communication device of claim 15, wherein one of the plurality of receiving circuits comprises: an analog to digital converter (ADC) configured to convert the RF signal that is received to a digital signal based on the frequency signal; and a digital conversion circuit configured to frequency down convert the digital signal based on the digital reference signal and generate a digital baseband signal. ### Claim 17 (depends on 16) The wireless communication device of claim 16, wherein the modem is configured to receive the digital baseband signal from the digital conversion circuit and process the digital baseband signal. ### Claim 18 (depends on 16) The wireless communication device of claim 16, wherein the modem is configured to provide, to the ADC, band group information about a band group corresponding to the RF signal, and the ADC is configured to determine a sampling rate based on the band group information, and convert the RF signal to the digital signal according to the sampling rate. ### Claim 19 (depends on 15) The wireless communication device of claim 15, wherein: the RF integrated circuit further comprises a frequency divider configured to receive the frequency signal from the shared phase locked loop circuit, divide the frequency signal, and provide the frequency signal that has been divided to the plurality of receiving circuits, and the modem is configured to control a frequency division ratio of the frequency divider based on a highest band group among two or more band groups corresponding to the RF signal. ### Claim 20 (depends on 15) The wireless communication device of claim 15, wherein: one of the plurality of receiving circuits comprises a frequency divider configured to receive the frequency signal, divide the frequency signal, and generate a divided frequency signal for the analog to digital conversion, and the modem is configured to control a division ratio of the frequency divider based on a base group corresponding to the RF signal. ### Claim 21 (depends on 15) The wireless communication device of claim 15, wherein the RF integrated circuit further comprises a plurality of transmitting circuits transmitting the RF signal, and the shared phase locked loop circuit is configured to provide to the plurality of transmitting circuits the frequency signal for digital to analog conversion. ### Claim 22 (depends on 21) The wireless communication device of claim 21, wherein one of the plurality of transmitting circuits comprises: a digital conversion circuit configured to frequency up convert a digital baseband signal received by the modem and generate a digital output signal; and a digital to analog converter (DAC) configured to convert the digital output signal to an analog signal by using the frequency signal. ### Claim 23 A non-transitory processor readable storage medium comprising commands, which, when executed by a processor inside a wireless communication device comprising a plurality of receiving circuits that share one phase locked loop circuit, the non-transitory processor is configured to provide, to the plurality of receiving circuits, a digital-reference signal for a frequency down conversion of a radio frequency (RF) signal received by the plurality of receiving circuits based on a frequency channel corresponding to the RF signal, and to provide to the plurality of receiving circuits a signal for adjusting a sampling rate at a time of an analog to digital conversion performed by the plurality of receiving circuits based on a band group corresponding to the RF signal.