Power multiplier system and method
AssigneeCreative Technology Ltd
InventorsJun Makino, Boon Ghee Ting
Life of this patent
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Abstract
A power multiplier system for an amplifier comprises a power multiplier control stage, an amplifier stage and a first switching stage connectable to the power multiplier control stage. The amplifier stage is connectable to the power multiplier control stage. The power multiplier system has a first output terminal and a second output terminal, the amplifier stage is connectable to the second output terminal for driving a load connectable between the first and second output terminals. The first switching stage is connectable to the first output terminal to apply a switchable DC voltage level to the first output terminal. There is also disclosed a method of amplifying the power output of an amplifier system.
Claims27
A power multiplier system for an amplifier comprising:
- a power multiplier control stage;
- an amplifier stage;
- and
- a first switching stage connectable to said power multiplier control stage;
- said amplifier stage being connectable to said power multiplier control stage;
- wherein said power multiplier system has a first output terminal and a second output terminal, said amplifier stage being connectable to said second output terminal for driving a load connectable between said first and second output terminals;
- and
- wherein said first switching stage is connectable to said first output terminal to apply a switchable DC voltage level to said first output terminal.
A method of amplifying power output from a digital amplifier system having a first output terminal and a second output terminal, the method comprising the steps of:
- applying an input signal to a power multiplier control stage;
- producing one or more signals in said power multiplier control stage;
- controlling an amplifier stage using one or more of said one or more signals;
- driving said second output terminal via said amplifier stage;
- controlling a first switching stage using one or more signals from said power multiplier control stage;
- and
- selecting in said first switching stage one or more switchable DC voltage levels from a plurality of voltage levels;
- and
- applying said one or more selected voltage levels to said first output terminal for producing a substantially undistorted waveform across a load connectable between said first and second output terminals.
Dependencies are inferred from the claim text.