Multi-bit class-D power amplifier system
AssigneeQUALCOMM Incorporated
InventorZhiheng Cao
Life of this patent
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Abstract
Techniques for designing an efficient power amplifier are described. In one aspect, multiple single unit instance class-D power amplifiers with coupled outputs are utilized to increase efficiency and reduce quantization noise. In another aspect, multiple groups of single unit instance class-D power amplifiers are coupled at the outputs thereof with each group of power amplifiers configured to resonate at unique frequency. This results in increased efficiency and reduction of quantization noise at multiple frequencies bands.
Claims27
A device comprising:
- a first power amplifier coupled to a first input to receive an initial set of bits from the multi bit pulse modulated signal;
- and
- a second power amplifier coupled to a second input and to the first power amplifier to receive the remaining set of bits from the multi bit pulse modulated signal, where the outputs of each of the first and second power amplifier resonate at a common frequency in a manner to reduce quantization noise.
A device comprising:
- a first group including a first set of power amplifiers coupled to a first input to receive an initial set of bits from the multi bit pulse modulated signal;
- and
- a second group including a second set of power amplifiers coupled to a second input to receive the remaining set of bits from the multi bit pulse modulated signal, where the first and second groups are coupled to one another, and where the outputs of each of the first and second sets of power amplifiers resonate at a common frequency in a manner to reduce quantization noise.
A multi-bit class-D power amplifier system for use in a wireless communication device, comprising:
- a first set of class-D power amplifiers to receive an initial set of bits from the multi bit pulse modulated signal;
- and
- a second set of class-D amplifiers coupled to the first set of class-D power amplifiers to receive the remaining set of bits from the multi bit pulse modulated signal, where outputs of each of the first and second set of class-D amplifiers resonate at a common frequency in a manner to reduce quantization noise.
A device comprising:
- first means for amplifying an initial set of bits from the multi bit pulse modulated signal;
- and
- second means for amplifying the remaining set of bits from the multi bit pulse modulated signal, where outputs of each of the first and second means resonate at a common frequency in a manner to reduce quantization noise.
A multi-bit class-D power amplifier system for use in a wireless communication device, comprising:
- first means for amplifying an initial set of bits from the multi bit pulse modulated signal and including a first set of class-D power amplifiers;
- and
- second means for amplifying the remaining set of bits from the multi bit pulse modulated signal and including a second set of class-D power amplifiers, where outputs of each of the first and second set of class-D power amplifiers resonate at a common frequency in a manner to reduce quantization noise.
Dependencies are inferred from the claim text.