Power amplifier
AssigneeHitachi Kokusai Electric Inc.
InventorYusaburo GOTO
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Abstract
In order to operate a power amplifier for synthesizing a plurality of amplifier circuits with high efficiency, the gate voltages of the field-effect transistors (FETs) of the plurality of amplifier circuits are adjusted according to an individual difference in saturated power between the amplifier circuits. Specifically, the output ratios of the amplifier circuits (AMP-4, 8) with low saturated power are reduced, whereas the output ratios of the amplifier circuits (AMP-2, 6) with high saturated power are increased. Thus, a device is operated with high efficiency.
Claims5
A power amplifier, which combines output power of a plurality of amplifier circuits, for controlling output power ratios of the plurality of amplifier circuits on the basis of individual differences in saturated power between the plurality of amplifier circuits,
- wherein an output power ratio of an amplifier circuit having low saturated power is decreased among the plurality of amplifier circuits.
(canceled)
Dependencies are inferred from the claim text.