US 12,244,273 B2
Amplifier circuit
Koudai Sugiyama, Kyoto (JP)
Assigned to MURATA MANUFACTURING CO., LTD., Kyoto (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto (JP)
Filed on Dec. 22, 2021, as Appl. No. 17/645,512.
Claims priority of application No. 2020-216143 (JP), filed on Dec. 25, 2020.
Prior Publication US 2022/0209723 A1, Jun. 30, 2022
Int. Cl. H03F 3/19 (2006.01); H03F 1/22 (2006.01)
CPC H03F 3/19 (2013.01) [H03F 2200/451 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An amplifier circuit comprising:
an input terminal;
an output terminal;
an amplifier between the input terminal and the output terminal, the amplifier comprising a first transistor and a second transistor that are connected to each other in parallel, a first capacitor, and a second capacitor; and
an inductor,
wherein the first transistor has a first control terminal connected to the input terminal, a first terminal connected to ground, and a second terminal connected to the output terminal,
wherein the second transistor has a second control terminal connected to the input terminal, a third terminal connected to ground, and a fourth terminal connected to the output terminal,
the control terminal of the first transistor is connected to the control terminal of the second transistor at a first node,
the inductor is connected between the input terminal and the first node,
the first capacitor is connected in series in a first path that connects the first node to the first control terminal,
the second capacitor is connected in series in a second path that connects the first node to the second control terminal, and
a capacitance of the first capacitor is different than a capacitance of the second capacitor.