# US 2025/0158643 A1 · Linearized front-end operation using information from baseband circuit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0158643 A1 - Document ID: US20250158643A1 - Status: Published application - Kind: A1 - Application number: 18/728,705 - Filed: 2023-01-18 - Published: 2025-05-15 - Earliest claimed: 2022-01-18 - Assignees: Qorvo US, Inc. - Applicants: Qorvo US, Inc. - Inventors: George Maxim; Nadim Khlat; Baker Scott; Jackie Johnson - Web page: https://patentgrep.com/patent/US20250158643A1 ## CPC - H04B 1/04: Circuits - H04B 1/0475: {with means for limiting noise, interference or distortion (H04B1/0483 takes precedence)} - H04B 2001/0425: {with linearisation using predistortion} - H04B: TRANSMISSION ## Abstract Systems and methods for front-end linearization using information from a baseband circuit are disclosed. In one aspect, a baseband circuit provides information to a front-end module that uses the information to adjust operating parameter settings such as how an analog predistortion (APD) circuit or power management integrated circuit behaves to provide more linear operation of the front-end module across the frequencies of interest. In exemplary aspects, the front-end module may receive raw information from which the front-end module determines what changes should be made. In alternate exemplary aspects, the baseband circuit provides instructions or coefficients that are then used by the front-end module to make the changes. In either event, the front-end module may optimize operation to reduce power consumption and provide more linear operation so that the transceiver may better operate within the parameters of a given wireless protocol. ## Claims ### Claim 1 An integrated circuit (IC) comprising a front-end module for use in a transceiver system, the front-end module comprising: a bus interface configured to be coupled to a baseband circuit through a communication bus; at least one register within the integrated circuit configured to store operating parameter settings based on information from the baseband circuit; an operating element within the integrated circuit that acts on a signal to be transmitted; and a control circuit within the integrated circuit that adjusts the operating element based on the operating parameter settings in the at least one register. ### Claim 2 (depends on 1) The IC of claim 1, wherein the operating element comprises a power management integrated circuit. ### Claim 3 (depends on 1) The IC of claim 1, wherein the operating element comprises a load coupled to an output of the front-end module. ### Claim 4 (depends on 1) The IC of claim 1, wherein the operating element comprises an analog predistortion (APD) circuit. ### Claim 5 (depends on 4) The IC of claim 4, wherein the APD circuit comprises an amplitude modulation-to-amplitude modulation (AM-AM) circuit. ### Claim 6 (depends on 4) The IC of claim 4, wherein the APD circuit comprises an amplitude modulation-to-phase modulation (AM-PM) circuit. ### Claim 7 (depends on 1) The IC of claim 1, wherein the operating element comprises a power amplifier stage. ### Claim 8 (depends on 1) The IC of claim 1, wherein the operating element comprises a bias circuit for a power amplifier stage. ### Claim 9 (depends on 1) The IC of claim 1, wherein the operating element comprises a matching circuit. ### Claim 10 (depends on 1) The IC of claim 1, further comprising a decoder configured to receive primary information from the baseband circuit through the bus interface and produce processed information therefrom. ### Claim 11 (depends on 1) The IC of claim 1, further comprising a look-up table (LUT) configured to use the information from the baseband circuit to determine the operating parameter settings. ### Claim 12 (depends on 11) The IC of claim 11, wherein the information from the baseband circuit comprises an index pointer configured to point to an entry in the LUT. ### Claim 13 (depends on 1) The IC of claim 1, wherein the information from the baseband circuit is derived in a software layer associated with the baseband circuit. ### Claim 14 (depends on 1) The IC of claim 1, wherein the information from the baseband circuit comprises processed information. ### Claim 15 (depends on 1) The IC of claim 1, wherein the information from the baseband circuit comprises information about a modulation generation. ### Claim 16 (depends on 1) The IC of claim 1, wherein the information from the baseband circuit comprises information about a baseband channel. ### Claim 17 (depends on 16) The IC of claim 16, wherein the information about the baseband channel comprises information about a sub-band. ### Claim 18 (depends on 1) The IC of claim 1, wherein the information from the baseband circuit comprises information about a peak-to-average ratio (PAR). ### Claim 19 (depends on 1) The IC of claim 1, wherein the information from the baseband circuit comprises information about a modulation type. ### Claim 20 (depends on 1) The IC of claim 1, wherein the information from the baseband circuit comprises information about carrier aggregation. ### Claim 21 (depends on 1) The IC of claim 1, wherein the information from the baseband circuit comprises information about a modulation power reduction (MPR) value. ### Claim 22 (depends on 1) The IC of claim 1, further comprising a receive chain and wherein the information from the baseband circuit is further used by the receive chain to modify the operating parameter settings. ### Claim 23 A transceiver system comprising: a baseband circuit; a communication bus coupled to the baseband circuit; and a front-end module comprising: a bus interface coupled to the communication bus; at least one register configured to store operating parameter settings based on information from the baseband circuit; an operating element that acts on a signal to be transmitted; and a control circuit that adjusts the operating element based on the operating parameter settings in the at least one register. ### Claim 24 (depends on 23) The transceiver system of claim 23, wherein the baseband circuit is configured to provide information about a transmit channel as part of the information. ### Claim 25 (depends on 24) The transceiver system of claim 24, wherein the information about the transmit channel comprises information about a position of the transmit channel. ### Claim 26 (depends on 23) The transceiver system of claim 23, wherein the baseband circuit is configured to provide information about a receive channel as part of the information. ### Claim 27 (depends on 26) The transceiver system of claim 26, further comprising a low noise amplifier (LNA) in a receive path and wherein the information about the receive channel is used by the control circuit to change operation of the LNA. ### Claim 28 (depends on 23) The transceiver system of claim 23, further comprising a power management circuit and wherein the baseband circuit is configured to provide the information to the power management circuit. ### Claim 29 (depends on 28) The transceiver system of claim 28, wherein the information comprises information about a sub-band. ### Claim 30 (depends on 23) The transceiver system of claim 23, wherein the operating element comprises a load line and the control circuit is configured to adjust the load line as a function of sub-band information in the information.