Power protecting apparatus and method for power amplifier
First Claim
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1. A power protecting apparatus comprising:
- a power amplifier for performing two stages of linear amplification by receiving the first power and the second power;
a switch for maintaining an on-state of the power amplifier to allow the first power to be transferred to the power amplifier while the power amplifier performs the first stage of the linear amplification;
a converter for supplying the second power to the power amplifier while the power amplifier performs the second stage of the linear amplification; and
a power protecting unit for removing a backward voltage generated when the second power is supplied to the power amplifier.
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Abstract
A power protecting apparatus and method of a power amplifier for removing backward voltages and preventing a hard damage within a circuit by connecting an output terminal of a DC-DC converter with an input terminal of a filter using diodes when an excessive backward voltage is generated due to physical characteristics of an inductor within the circuit at the time of applying high power level and low power level to the power amplifier using switching devices within a power circuit in order to optimize power consumption.
22 Citations
21 Claims
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1. A power protecting apparatus comprising:
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a power amplifier for performing two stages of linear amplification by receiving the first power and the second power;
a switch for maintaining an on-state of the power amplifier to allow the first power to be transferred to the power amplifier while the power amplifier performs the first stage of the linear amplification;
a converter for supplying the second power to the power amplifier while the power amplifier performs the second stage of the linear amplification; and
a power protecting unit for removing a backward voltage generated when the second power is supplied to the power amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A mobile communications terminal comprising:
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a power amplifier for performing a amplification for power levels by receiving a first power and a second power;
a controller for controlling the gain of the power amplifier according to a received control signal; and
a power protecting apparatus for removing backward voltages generated when changing the gain. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification