# US 2021/0242841 A1 · Amplification device and transmission/reception system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0242841 A1 - Document ID: US20210242841A1 - Status: Published application - Kind: A1 - Application number: 17/155,464 - Filed: 2021-01-22 - Published: 2021-08-05 - Earliest claimed: 2020-01-30 - Assignees: Koden Electronics Co., Ltd. - Applicants: Koden Electronics Co., Ltd. - Inventors: Daisuke HAYASHI; Norihito HAMADA; Shigeo KAWASAKI - Web page: https://patentgrep.com/patent/US20210242841A1 ## CPC - H03F 3/245: {with semiconductor devices only} - H03F 1/02: Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation - H03F 1/3241: {using predistortion circuits (H03F1/3211, H03F1/3217 take precedence)} - H03F 3/19: with semiconductor devices only - H04B 1/02: Transmitters - H04B 1/04: Circuits - H04B 1/06: Receivers - H03F 2200/451: the amplifier being a radio frequency amplifier - H03F: AMPLIFIERS - H04B: TRANSMISSION ## Abstract An amplification device includes a pulse signal acquisition part, a dummy signal generation part, a combination part, an amplifier and a separation part. The pulse signal acquisition part acquires a desired signal that is a pulse signal to be amplified. The dummy signal generation part generates a dummy signal. The combination part adds the dummy signal before and after the desired signal and outputs a composite signal. The amplifier amplifies the composite signal and outputs an amplified composite signal. The separation part extracts an amplified desired signal that is a signal resulting from amplification of the desired signal, from the amplified composite signal and outputs the amplified desired signal. Power of the composite signal is power that makes the amplification part operate nonlinearly. ## Claims ### Claim 1 An amplification device comprising: a pulse signal acquisition part that acquires a desired signal that is a pulse signal to be amplified; a dummy signal generation part that generates a dummy signal; a combination part that adds the dummy signal before and after the desired signal and outputs a composite signal; an amplifier that amplifies the composite signal and outputs an amplified composite signal; and a separation part that extracts an amplified desired signal that is a signal resulting from amplification of the desired signal, from the amplified composite signal and outputs the amplified desired signal, wherein power of the composite signal is power that makes the amplification part operate nonlinearly, and the power of the composite signal is constant within a time range obtained by addition of a predetermined time to a time during which the desired signal exists. ### Claim 2 An amplification device comprising: a pulse signal acquisition part that acquires a desired signal that is a pulse signal to be amplified; a dummy signal generation part that generates a dummy signal; a combination part that adds the dummy signal before and after the desired signal and outputs a composite signal; and an amplifier that amplifies the composite signal and outputs an amplified composite signal, wherein the dummy signal is a signal that is separable from the desired signal, power of the composite signal is power that makes the amplification part operate nonlinearly, and the power of the composite signal is constant within a time range obtained by addition of a predetermined time to a time during which the desired signal exists. ### Claim 3 (depends on 2) A transmission/reception system comprising: a transmission apparatus that includes the amplification device according to claim 2 and transmits the amplified composite signal; and a reception apparatus that receives the amplified composite signal transmitted by the transmission apparatus, wherein the reception apparatus includes a separation part that extracts an amplified desired signal that is a signal resulting from amplification of the desired signal, from the amplified composite signal received and outputs the amplified desired signal. ### Claim 4 (depends on 1) The amplification device according to claim 1, wherein the predetermined time is a time added for stabilization of the nonlinear operation of the amplifier. ### Claim 5 (depends on 2) The amplification device according to claim 2, wherein the predetermined time is a time added for stabilization of the nonlinear operation of the amplifier. ### Claim 6 (depends on 1) The amplification device according to claim 1, wherein: the desired signal is one of consecutive pulse signals with a time interval therebetween; the amplification device further includes a power detection part that detects power of the desired signal; and the dummy signal generation part generates the dummy signal based on the power detected by the power detection part. ### Claim 7 (depends on 2) The amplification device according to claim 2, wherein: the desired signal is one of consecutive pulse signals with a time interval therebetween; the amplification device further includes a power detection part that detects power of the desired signal; and the dummy signal generation part generates the dummy signal based on the power detected by the power detection part. ### Claim 8 (depends on 4) The amplification device according to claim 4, wherein: the desired signal is one of consecutive pulse signals with a time interval therebetween; the amplification device further includes a power detection part that detects power of the desired signal; and the dummy signal generation part generates the dummy signal based on the power detected by the power detection part. ### Claim 9 (depends on 5) The amplification device according to claim 5, wherein: the desired signal is one of consecutive pulse signals with a time interval therebetween; the amplification device further includes a power detection part that detects power of the desired signal; and the dummy signal generation part generates the dummy signal based on the power detected by the power detection part. ### Claim 10 (depends on 1) The amplification device according to claim 1, wherein the amplifier is a GaN amplifier. ### Claim 11 (depends on 2) The amplification device according to claim 2, wherein the amplifier is a GaN amplifier. ### Claim 12 (depends on 4) The amplification device according to claim 4, wherein the amplifier is a GaN amplifier. ### Claim 13 (depends on 5) The amplification device according to claim 5, wherein the amplifier is a GaN amplifier. ### Claim 14 (depends on 6) The amplification device according to claim 6, wherein the amplifier is a GaN amplifier. ### Claim 15 (depends on 7) The amplification device according to claim 7, wherein the amplifier is a GaN amplifier. ### Claim 16 (depends on 8) The amplification device according to claim 8, wherein the amplifier is a GaN amplifier. ### Claim 17 (depends on 9) The amplification device according to claim 9, wherein the amplifier is a GaN amplifier.