High-frequency amplifier circuit
AssigneeMurata Manufacturing Co., Ltd.
InventorKeiji Kusachi
Life of this patent
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Abstract
A high-frequency amplifier circuit (10) includes a high-frequency amplifying element (11), a bias circuit (12), and a bias adjusting circuit (13). The high-frequency amplifying element (11) includes an input end and an output end. The bias circuit (12) is connected to the high-frequency amplifying element (11) and supplies a first bias voltage to an input side of the high-frequency amplifying element (11). The bias adjusting circuit (13) is connected between the input end and the bias circuit (12) and adjusts the first bias voltage based on a high-frequency signal inputted to the input end. The bias adjusting circuit (13) includes a lumped element and an active element.
Claims26
A high-frequency amplifier circuit comprising:
- a high-frequency amplifying element including an input end and an output end;
- a bias circuit that is connected to the high-frequency amplifying element and that supplies a first bias voltage to an input side of the high-frequency amplifying element;
- and
- a bias adjusting circuit that is connected between the input end and the bias circuit and that adjusts the first bias voltage based on a high-frequency signal inputted to the input end,
- the bias adjusting circuit including a lumped element and an active element.
Dependencies are inferred from the claim text.