# US 10,122,389 B2 · Communication circuit for supporting communication function and electronic 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 10,122,389 B2 - Document ID: US10122389B2 - Status: Granted - Kind: B2 - Application number: 14/959,603 - Filed: 2015-12-04 - Published: 2016-06-09 - Granted: 2018-11-06 - Earliest claimed: 2014-12-05 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd - Inventors: Young Ju Kim; Sung Chul Park - Web page: https://patentgrep.com/patent/US10122389B2 ## CPC - H04B 1/0057: {using diplexing or multiplexing filters for selecting the desired band} - H04B 1/0053: {with common antenna for more than one band} - H04B 1/403: using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency - H04B 1/44: Transmit/receive switching - H04B: TRANSMISSION ## Abstract An electronic device includes a communication circuit. The communication circuit includes at least one receive amplifier configured to connect to an antenna and to low-noise amplify at least a part of a multi-band signal, and a transceiver including a mixer configured to mix the signal low-noise amplified by the at least one receive amplifier, wherein the transceiver is configured to process the multi-band signal. ## Claims ### Claim 1 A communication circuit comprising: an antenna; and a radio frequency (RF) module comprising: a transmit amplifier configured to amplify a signal output from a transceiver; a front-end switching circuit configured to connect to the antenna; a duplexer or a quadplexer configured to be disposed between the front-end switching circuit and the transmit amplifier; at least one back-end switching circuit coupled to the duplexer or the quadplexer; and at least one receive amplifier that is disposed between the at least one back-end switching circuit and the transceiver, wherein the at least one receive amplifier is configured to low-noise amplify at least a part of a multi-band signal, and wherein the transceiver comprises a mixer configured to mix the multi-band signal low-noise amplified by the at least one receive amplifier. ### Claim 2 (depends on 1) The communication circuit of claim 1, wherein the transceiver further comprises: a buffer configured to connect with an output end of the at least one receive amplifier. ### Claim 3 (depends on 1) The communication circuit of claim 1, further comprising: a matching circuit configured to be disposed between the transceiver and the at least one receive amplifier. ### Claim 4 (depends on 1) The communication circuit of claim 1, wherein the RF module further comprises: a transmit band switching circuit configured to classify and transmit an output signal of the transmit amplifier for each band, and at least one of the front-end switching circuit, the duplexer or quadplexer, the back-end switching circuit, or the at least one receive amplifier, are integrated. ### Claim 5 (depends on 4) The communication circuit of claim 4, wherein the RF module comprises: a plurality of RF modules configured to support a plurality of frequency bands, respectively. ### Claim 6 (depends on 5) The communication circuit of claim 5, further comprising: a diplexer configured to connect to the antenna and to divide signals of the plurality of RF modules. ### Claim 7 (depends on 5) The communication circuit of claim 5, wherein the RF modules comprise: a dedicated receive RF module comprising the at least one receive amplifier and configured to be disposed between the transceiver and the antenna, wherein the dedicated receive RF module comprises: a front-end switching circuit configured to connect with the antenna, a band pass filter (BPF) configured to connect to the front-end switching circuit, and at least one back-end switching circuit configured to connect to the BPF, and wherein the at least one receive amplifier is configured to connect to an output end of the at least one back-end switching circuit connected to the BPF. ### Claim 8 (depends on 7) The communication circuit of claim 7, wherein the at least one back-end switching circuit connected to the BPF comprises: a plurality of back-end switching circuits configured to selectively connect to a plurality of frequency bands, and wherein the at least one receive amplifier comprises: a plurality of receive amplifiers configured to respectively connect to output ends of the plurality of back-end switching circuits. ### Claim 9 (depends on 5) The communication circuit of claim 5, wherein the RF modules comprise: a plurality of dedicated receive RF modules configured to be disposed between the transceiver and the antenna, and to respectively cover a plurality of frequency bands, wherein each of the dedicated receive RF modules respectively includes a receive amplifier of the at least one receive amplifier. ### Claim 10 (depends on 9) The communication circuit of claim 9, further comprising: a diplexer configured to be disposed between the antenna and the plurality of dedicated receive RF modules. ### Claim 11 (depends on 1) The communication circuit of claim 1, wherein the at least one receive amplifier comprises a plurality of receive amplifiers, and the communication circuit further comprises a plurality of matching circuits configured to respectively connect to output ends of the plurality of receive amplifiers. ### Claim 12 (depends on 1) The communication circuit of claim 1, further comprising: at least one bypass circuit configured to connect in parallel to the at least one receive amplifier, wherein if a wireless environment is under a strong electric field of specific strength or more, the at least one bypass circuit is turned on, and wherein if the wireless environment is under a weak electric field of less than the specific strength, the at least one bypass circuit is turned off. ### Claim 13 (depends on 1) The communication circuit of claim 1, wherein the at least one back-end switching circuit comprises a plurality of back-end switching circuits, and wherein the at least one receive amplifier comprises a plurality of receive amplifiers respectively connected to the plurality of back-end switching circuits according to a carrier aggregation (CA) operation. ### Claim 14 An electronic device comprising: a communication circuit comprising: an antenna; and a radio frequency (RF) module comprising: a transmit amplifier configured to amplify a signal output from a transceiver; a front-end switching circuit configured to connect to the antenna; a duplexer or quadplexer configured to be disposed between a front-end switching circuit and the transmit amplifier; at least one back-end switching circuit coupled to the duplexer or the guadplexer; and at least one receive amplifier that is disposed between the at least one back -end switching circuit and the receiver, wherein the at least one receive amplifier is configured to low-noise amplify at least a part of a multi-band signal, and wherein the transceiver comprises a mixer configured to mix the multi-band signal low-noise amplified by the at least one receive amplifier. ### Claim 15 (depends on 14) The electronic device of claim 14, wherein: the radio frequency (RF) module further comprises: a transmit band switching circuit configured to classify and transmit an output signal of the transmit amplifier for each band. ### Claim 16 (depends on 15) The electronic device of claim 15, wherein the RF module further comprises: a plurality of RF modules configured to support a plurality of frequency bands, respectively. ### Claim 17 (depends on 14) The electronic device of claim 14, further comprising: at least one bypass circuit configured to connect in parallel to the at least one receive amplifier. ### Claim 18 (depends on 17) The electronic device of claim 17, wherein a modem is further configured to: turn on the at least one bypass circuit if a wireless environment is under a strong electric field of specific strength or more; or turn off the at least one bypass circuit if the wireless environment is under a weak electric field of less than the specific strength. ### Claim 19 (depends on 14) The electronic device of claim 14, wherein the at least one back-end switching circuit comprises a plurality of back-end switching circuits, and wherein the at least one receive amplifier comprises a plurality of receive amplifiers respectively connected to the plurality of back-end switching circuits according to a carrier aggregation (CA) operation.