Current control circuit, bias supply circuit, and amplifier device
AssigneeMurata Manufacturing Co., Ltd.
InventorKazuhiko Ishimoto
Life of this patent
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Abstract
A current control circuit controls a bias current that is supplied to an amplifier transistor that amplifies a radio-frequency signal and includes a node, a constant current source circuit that supplies a first current to the node, and a variable current source circuit that supplies a second current to the node, based on a result of comparison between a potential of the node and a reference potential. The node outputs a control current including the first current and the second current for controlling the bias current.
Claims18
A current control circuit for controlling a bias current that is supplied to an amplifier transistor that amplifies a radio-frequency signal, the current control circuit comprising:
- a first node;
- a first constant current source circuit configured to supply a first current to the first node;
- and
- a variable current source circuit configured to supply a second current to the first node, based on a result of a comparison between a potential of the first node and a reference potential,
- wherein a control current including the first current and the second current for controlling the bias current are output from the first node.
Dependencies are inferred from the claim text.