# US 9,438,187 B2 · Amplifying device, transmitting device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,438,187 B2 - Document ID: US9438187B2 - Status: Granted - Kind: B2 - Application number: 14/328,140 - Filed: 2014-07-10 - Published: 2015-01-15 - Granted: 2016-09-06 - Earliest claimed: 2013-07-11 - Assignees: Kabushiki Kaisha Toshiba - Applicants: Kabushiki Kaisha Toshiba - Inventors: Atsushi Yamaoka; Keiichi Yamaguchi - Web page: https://patentgrep.com/patent/US9438187B2 ## CPC - H03F 3/245: {with semiconductor devices only} - H03F 1/0261: {with control of the polarisation voltage or current, e.g. gliding Class A} - H03F 1/0288: {using a main and one or several auxiliary peaking amplifiers whereby the load is connected to the main amplifier using an impedance inverter, e.g. Doherty amplifiers} - H04B 1/0458: {Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages (matching circuits in general H03H)} - H04B 1/0483: {Transmitters with multiple parallel paths} - H03F 2200/423: Amplifier output adaptation especially for transmission line coupling purposes, e.g. impedance adaptation - H03F 2203/21139: An impedance adaptation circuit being added at the output of a power amplifier stage - H03F: AMPLIFIERS - H04B: TRANSMISSION ## Abstract An amplifying device of an embodiment includes: a first amplifier amplifying a first component of an input signal; a first output circuit having an input connected to an output of the first amplifier and converting impedance seen from an output of the first output circuit to make the converted impedance seen from the first amplifier; a second amplifier amplifying a second component of the input signal with a bias deeper than that of the first amplifier; a second output circuit having an input connected to an output of the second amplifier, having a longer electrical length than that of the first output circuit part, and converting impedance seen from an output of the second output circuit to make the converted impedance seen from the second amplifier; and a combiner combining the first component amplified by the first amplifier and the second component amplified by the second amplifier. ## Claims ### Claim 1 An amplifying device comprising: a first amplifier to amplify a first signal component of an input signal; a first output circuit having an input connected to an output of the first amplifier, the first output circuit converting an impedance seen from an output of the first output circuit so as to make the converted impedance seen from the first amplifier; a second amplifier to amplify a second signal component of the input signal with a bias deeper than a bias of the first amplifier; a second output circuit having an input connected to an output of the second amplifier, the second output circuit having a longer electrical length than an electric length of the first output circuit, the second output circuit converting an impedance seen from an output of the second output circuit so as to make the converted impedance seen from the second amplifier; a combiner to combine the first signal component amplified by the first amplifier and the second signal component amplified by the second amplifier, and an operation controller to switch operating classes of the first amplifier and the second amplifier according to a frequency of the input signal. ### Claim 2 (depends on 1) The amplifying device of claim 1, further comprising: a first matching circuit disposed between the first amplifier and the first output circuit, the first matching circuit having a 1% fractional bandwidth or more; and a second matching circuit disposed between the second amplifier and the second output circuit, the second matching circuit having a 1% fractional bandwidth or more. ### Claim 3 (depends on 2) The amplifying device of claim 2, wherein the first matching circuit and the second matching circuit are capable of performing the matching in predetermined two frequencies or more. ### Claim 4 (depends on 2) The amplifying device of claim 2, further comprising an operation controller to control operating points of the first amplifier and the second amplifier according to a frequency of the input signal. ### Claim 5 (depends on 2) The amplifying device of claim 2, further comprising a transmission line connected to an input of the first amplifier, the transmission line having an electrical length equal to a difference between the electrical lengths of the first output circuit and the second output circuit. ### Claim 6 (depends on 2) The amplifying device of claim 2, wherein the first matching circuit and the second matching circuit are capable of performing matching in predetermined two frequencies or more. ### Claim 7 (depends on 2) The amplifying device of claim 2, wherein the first output circuit and the second output circuit each include a plurality of impedance converting circuits. ### Claim 8 (depends on 2) The amplifying device of claim 2, further comprising a splitter to split the input signal into the first signal component and the second signal component. ### Claim 9 (depends on 2) The amplifying device of claim 2, further comprising: a third matching circuit connected to an input of the first amplifier, the third matching circuit having a 1% fractional bandwidth or more; and a fourth matching circuit connected to an input of the second amplifier, the fourth matching circuit having a 1% fractional bandwidth or more. ### Claim 10 (depends on 2) A transmitting device comprising: the amplifying device according to claim 2; and a signal generator to generate a signal with a predetermined frequency as the input signal to supply the signal to the amplifying device. ### Claim 11 (depends on 10) The transmitting device according to claim 10, further comprising: a signal controller to control the signal generator to control the frequency of the input signal and generate a trigger signal according to the controlled frequency; and an operation controller to control operating points of the first amplifier and the second amplifier according to a frequency of the input signal based on the trigger signal. ### Claim 12 (depends on 1) The amplifying device of claim 1, wherein the operation controller controls operating voltages of amplifying elements of the first amplifier and the second amplifier to switch the operation classes according to the frequency of the input signal. ### Claim 13 (depends on 1) The amplifying device of claim 1, further comprising a transmission line connected to an input of the first amplifier, the transmission line having an electrical length equal to a difference between the electrical lengths of the first output circuit and the second output circuit. ### Claim 14 (depends on 1) The amplifying device of claim 1, wherein the first output circuit and the second output circuit each include a plurality of impedance converting circuits. ### Claim 15 (depends on 1) The amplifying device of claim 1, further comprising a splitter to split the input signal into the first signal component and the second signal component. ### Claim 16 (depends on 1) The amplifying device of claim 1, further comprising: a first matching circuit connected to an input of the first amplifier, the third matching circuit having a 1% fractional bandwidth or more; and a second matching circuit connected to an input of the second amplifier, the fourth matching circuit having a 1% fractional bandwidth or more. ### Claim 17 (depends on 1) A transmitting device comprising: the amplifying device according to claim 1; and a signal generator to generate a signal with a predetermined frequency as the input signal to supply the signal to the amplifying device. ### Claim 18 (depends on 17) The transmitting device of claim 17, further comprising: a signal controller to control the signal generator to control the frequency of the input signal and generate a trigger signal according to the controlled frequency; and an operation controller to control operating points of the first amplifier and the second amplifier according to a frequency of the input signal based on the trigger signal.