Power amplifier having a bias current control circuit
AssigneeInformation and Communications University Educational Foundation
InventorsJi Hoon Kim, Youn Sub Noh, Chul Soon Park, Joon Hyung Kim
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Abstract
A power amplifier for use in a mobile handset includes an amplifying transistor for generating an output of the mobile handset, a bias circuit having a bias transistor and providing a bias current to bias the amplifying transistor, and a bias current control circuit, responsive to a control signal, for adjusting the bias current to control an operation current of the amplifying transistor. The control signal is generated by the mobile handset, and the control signal is determined by a power level of the output of the mobile handset.
Claims9
A power amplifier for use in a mobile handset, comprising:
- an amplifying transistor for generating an output of the mobile handset;
- a bias circuit including a bias transistor, the bias circuit providing a bias current to bias the amplifying transistor;
- and
- a bias current control circuit, responsive to a control signal, for adjusting the bias current to control an operation current of the amplifying transistor,
- wherein the control signal is determined by a power level of the output of the mobile handset.
Dependencies are inferred from the claim text.