High-power amplifier apparatus for TDD wireless communication system
First Claim
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1. A high-power amplifier (HPA) apparatus for a Time Division Duplex (TDD) wireless communication system, comprising:
- a power amplifier for amplifying the power of an input signal;
a gate bias controller for turning on/off a gate bias of the amplifier in accordance with a TDD control signal; and
a constellation error optimizer circuit being coupled to a drain of the power amplifier for removing a current fluctuation and a power noise.
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Abstract
Provided is an HPA apparatus for a TDD wireless communication system. In the HPA apparatus, a power amplifier amplifies the power of an input signal. A gate bias controller turns on/off a gate bias of the power amplifier in accordance with a TDD control signal. A constellation error optimizer circuit removes a current fluctuation and a power noise, which occur when the gate bias controller turns on/off the power amplifier in a TX mode, to stabilize a drain bias thereof.
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Citations
20 Claims
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1. A high-power amplifier (HPA) apparatus for a Time Division Duplex (TDD) wireless communication system, comprising:
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a power amplifier for amplifying the power of an input signal;
a gate bias controller for turning on/off a gate bias of the amplifier in accordance with a TDD control signal; and
a constellation error optimizer circuit being coupled to a drain of the power amplifier for removing a current fluctuation and a power noise. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A power amplifying apparatus in a Time Division Duplex (TDD) wireless communication system, comprising:
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a first power amplifier for amplifying the power of an input signal;
a second power amplifier for amplifying the output signal of the first amplifier. a first gate bias controller for turning on/off a gate bias of the first amplifier in accordance with a TDD control signal;
a second gate bias controller for turning on/off a gate bias of the second amplifier in accordance with the TDD control signal; and
a constellation error optimizer circuit being coupled to a drain of the second power amplifier for removing a current fluctuation and a power noise. - View Dependent Claims (11, 12, 13)
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14. A power amplifying apparatus in a Time Division Duplex (TDD) wireless communication system, comprising:
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a first power amplifier for amplifying the power of an input signal;
a second power amplifier for amplifying the output signal of the first amplifier. a first gate bias controller for turning on/off a gate bias of the first amplifier in accordance with a TDD control signal;
a second gate bias controller for turning on/off a gate bias of the second amplifier in accordance with the TDD control signal; and
a constellation error optimizer circuit being coupled to a drain of the first power amplifier and a drain of the second power amplifier for removing a current fluctuation and a power noise. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification