US 12,191,832 B2
Load-modulated balanced amplifier (LMBA) based on variable cross-coupled pair (XCP)
Kai Yi, Chengdu (CN); Kai Kang, Chengdu (CN); Chenxi Zhao, Chengdu (CN); and Huihua Liu, Chengdu (CN)
Assigned to CHENGDU FLUXWORKS TECHNOLOGY CO., LTD, Chengdu (CN)
Appl. No. 18/566,099
Filed by CHENGDU FLUXWORKS TECHNOLOGY CO., LTD, Chengdu (CN)
PCT Filed May 26, 2023, PCT No. PCT/CN2023/096529
§ 371(c)(1), (2) Date Dec. 1, 2023,
PCT Pub. No. WO2024/055632, PCT Pub. Date Mar. 21, 2024.
Claims priority of application No. 202211131218.1 (CN), filed on Sep. 16, 2022.
Prior Publication US 2024/0267015 A1, Aug. 8, 2024
Int. Cl. H03G 3/00 (2006.01); H03F 1/08 (2006.01); H03F 3/45 (2006.01)
CPC H03G 3/007 (2013.01) [H03F 1/086 (2013.01); H03F 3/45264 (2013.01); H03F 2200/451 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A load-modulated balanced amplifier (LMBA) based on a variable cross-coupled pair (XCP), comprising an adaptive bias (ADB) circuit, a first balance terminal amplifier module, a second balance terminal amplifier module, a control terminal amplifier module, a first driver amplifier module, a second driver amplifier module, a third driver amplifier module, a variable XCP, first resistor, a second resistor, a first 90-degree differential coupler, a second 90-degree differential coupler, and a third 90-degree differential coupler, wherein
an input terminal of the ADB circuit and a third input terminal of the first 90-degree differential coupler each serve as an input terminal of an amplifier;
one terminal of an isolated terminal of the first 90-degree differential coupler is connected to the other terminal of the isolated terminal of the first 90-degree differential coupler through the first resistor;
a pass-through terminal of the first 90-degree differential coupler comprises one terminal connected to a first input terminal of the second 90-degree differential coupler, and the other terminal connected to a second input terminal of the second 90-degree differential coupler;
one terminal of an isolated terminal of the second 90-degree differential coupler is connected to the other terminal of the isolated terminal of the second 90-degree differential coupler through the second resistor;
a third output terminal of the first 90-degree differential coupler is connected to an input terminal of the third driver amplifier module;
an output terminal of the third driver amplifier module is connected to an input terminal of the control terminal amplifier module;
a coupling terminal of the degree differential coupler comprises one terminal connected to a first input terminal of the first driver amplifier module, and the other terminal connected to a second input terminal of the first driver amplifier module;
a pass-through terminal of the second 90-degree differential coupler comprises one terminal connected to a first input terminal of the second driver amplifier module, and the other terminal connected to a second input terminal of the second driver amplifier module;
an output terminal of the first driver amplifier module is connected to an input terminal of the first balance terminal amplifier module;
an output terminal of the second driver amplifier module is connected to an input terminal of the second balance terminal amplifier module;
a first output terminal and a second output terminal of the first balance terminal amplifier module are respectively connected to one terminal of a pass-through terminal of the third 90-degree differential coupler and the other terminal of the pass-through terminal of the third 90-degree differential coupler;
the second balance terminal amplifier module comprises a first output terminal connected to one terminal of a coupling terminal of the third 90-degree differential coupler, and a second output terminal connected to the other terminal of the coupling terminal of the third 90-degree differential coupler;
an output terminal of the control terminal amplifier module is connected to an isolated terminal of the third 90-degree differential coupler; and an output terminal of the third 90-degree differential coupler serves as an output terminal of the millimeter-wave LMBA based on the variable XCP.