# US 2018/0323754 A1 · Power amplification device, terminal having the same, and base station having the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0323754 A1 - Document ID: US20180323754A1 - Status: Published application - Kind: A1 - Application number: 15/862,213 - Filed: 2018-01-04 - Published: 2018-11-08 - Earliest claimed: 2017-01-06 - Assignees: Samsung Electronics Co., Ltd.; Postech Academy-Industry Foundation - Applicants: Samsung Electronics Co., Ltd.; Postech Academy-Industry Foundation - Inventors: Jihoon KIM; Bumman KIM; Kyunghoon MOON; Seokwon LEE; Daechul JEONG; Byungjoon PARK; Juho SON - Web page: https://patentgrep.com/patent/US20180323754A1 ## CPC - H03F 1/56: Modifications of input or output impedances, not otherwise provided for - H03F 1/0211: {with control of the supply voltage or current} - H03F 1/0283: {Reducing the number of DC-current paths} - H03F 1/3205: {in field-effect transistor amplifiers} - H03F 1/3211: {in differential amplifiers} - H03F 1/565: {using inductive elements} - H03F 3/193: with field-effect devices (H03F3/195 takes precedence) - H03F 3/211: {using a combination of several amplifiers (H03F3/60 takes precedence)} - H03F 3/45475: {using IC blocks as the active amplifying circuit} - H03F 2200/222: A circuit being added at the input of an amplifier to adapt the input impedance of the amplifier - H03F 2200/267: A capacitor based passive circuit, e.g. filter, being used in an amplifying circuit - H03F 2200/271: the DC-isolation amplifier, e.g. chopper amplifier, modulation/demodulation amplifier, uses capacitive isolation means, e.g. capacitors - H03F 2200/387: A circuit being added at the output of an amplifier to adapt the output impedance of the amplifier - H03F 2200/408: the output amplifying stage of an amplifier comprising three power stages - H03F 2200/451: the amplifier being a radio frequency amplifier - H03F 2200/534: Transformer coupled at the input of an amplifier - H03F 2200/537: A transformer being used as coupling element between two amplifying stages - H03F 2200/541: Transformer coupled at the output of an amplifier - H03F 2203/21103: An impedance adaptation circuit being added at the input of a power amplifier stage - H03F 2203/21139: An impedance adaptation circuit being added at the output of a power amplifier stage - H04W 88/08: Access point devices - H03F: AMPLIFIERS - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract The method and system for converging a 5th-generation (5G) communication system for supporting higher data rates beyond a 4th-generation (4G) system with a technology for internet of things (IoT) are provided. The method includes intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The system includes a power amplification device capable of minimizing the effect of envelope impedance. The power amplification device may be incorporated in a terminal and a base station. ## Claims ### Claim 1 A power amplification device comprising: a power amplifier configured to amplify an input signal; and an element connected to the power amplifier and configured to reduce envelope impedance for maintaining linearity of the power amplifier. ### Claim 2 (depends on 1) The power amplification device of claim 1, wherein the element is further configured to have output impedance lower than a predetermined threshold value. ### Claim 3 (depends on 1) The power amplification device of claim 1, wherein the element is a regulator configured to supply power to the power amplifier. ### Claim 4 (depends on 3) The power amplification device of claim 3, further comprising: a capacitor connected to an output end of the regulator and configured to stabilize an output voltage of the regulator. ### Claim 5 (depends on 1) The power amplification device of claim 1, wherein the power amplifier includes one or more stages, and wherein the element is disposed as many as the number of the stages. ### Claim 6 (depends on 5) The power amplification device of claim 5, wherein the element is connected to a drain of a transistor included in each stage. ### Claim 7 (depends on 5) The power amplification device of claim 5, wherein the envelope impedance of the power amplification device is reduced by power supplied to each stage of the power amplifier through the element. ### Claim 8 (depends on 5) The power amplification device of claim 5, wherein isolation between the stages is maintained by power supplied to each stage of the power amplifier through the element. ### Claim 9 A power amplification device comprising: one or more power amplification device units, wherein each of the one or more power amplification device units includes: a power amplifier configured to amplify an input signal; and an element connected to the power amplifier and configured to reduce envelope impedance for maintaining linearity of the power amplifier. ### Claim 10 (depends on 9) The power amplification device of claim 9, wherein the element is further configured to have output impedance lower than a predetermined threshold value. ### Claim 11 (depends on 9) The power amplification device of claim 9, wherein the element is a regulator configured to supply power to the power amplifier. ### Claim 12 (depends on 9) The power amplification device of claim 9, wherein the power amplification device units are connected in parallel with each other. ### Claim 13 (depends on 12) The power amplification device of claim 12, wherein isolation between the power amplification device units is maintained by power supplied to each power amplifier through each element. ### Claim 14 (depends on 9) The power amplification device of claim 9, further comprising: one or more capacitors each of which is disposed at an input end of the element included in the power amplification device unit, wherein the number of capacitors is smaller than the number of power amplification device units. ### Claim 15 (depends on 9) The power amplification device of claim 9, wherein the power amplifier includes one or more stages, and wherein the element is disposed as many as the number of the stages. ### Claim 16 (depends on 15) The power amplification device of claim 15, wherein the element is connected to a drain of a transistor included in each stage. ### Claim 17 (depends on 15) The power amplification device of claim 15, wherein the envelope impedance of the power amplification device is reduced by power supplied to each stage of the power amplifier through the element. ### Claim 18 (depends on 15) The power amplification device of claim 15, wherein isolation between the stages is maintained by power supplied to each stage of the power amplifier through the element. ### Claim 19 A terminal comprising: a power amplification device, wherein the power amplification device includes: a power amplifier configured to amplify an input signal; and an element connected to the power amplifier and configured to reduce envelope impedance for maintaining linearity of the power amplifier. ### Claim 20 A base station comprising: a power amplification device, wherein the power amplification device includes: a power amplifier configured to amplify an input signal; and an element connected to the power amplifier and configured to reduce envelope impedance for maintaining linearity of the power amplifier.