Method and apparatus for predictively optimizing efficiency of a radio frequency (RF) power amplifier
First Claim
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1. A method for adjusting a supply voltage of a power amplifier in a wireless terminal, the method comprising:
- predictively determining a voltage value to continuously control a voltage converter of the wireless terminal; and
outputting a control signal based on the determined voltage value, wherein, in response to the control signal, the voltage converter outputs to the power amplifier for minimizing the supply voltage of the power amplifier at a predetermined power level.
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Abstract
An approach provides for predictive and continuous supply voltage adjustment of a Radio Frequency (RF) power amplifier in a wireless terminal. A voltage value is predictively determined to continuously control a voltage converter of the wireless terminal for maximizing RF power amplifier efficiency. A control signal is output based on the determined voltage value, wherein, in response to the control signal, the voltage converter outputs a power amplifier supply voltage of the wireless terminal. The above arrangement has particular application to a cellular handset for improved battery life.
68 Citations
36 Claims
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1. A method for adjusting a supply voltage of a power amplifier in a wireless terminal, the method comprising:
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predictively determining a voltage value to continuously control a voltage converter of the wireless terminal; and
outputting a control signal based on the determined voltage value, wherein, in response to the control signal, the voltage converter outputs to the power amplifier for minimizing the supply voltage of the power amplifier at a predetermined power level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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a voltage converter configured to drive a supply of a power amplifier; and
logic configured to predictively determine a voltage value to continuously control the voltage converter for minimizing supply voltage of the power amplifier at a predetermined power level. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An apparatus comprising:
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a voltage converting means for driving a supply of a power amplifier; and
means for predictively determining a voltage value to continuously control the voltage converter for minimizing supply voltage of the power amplifier at a predetermined power level. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A method for extending talk time in a cellular handset, the method comprising:
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predictively determining a variable supply voltage through a transmitter automatic gain control (AGC) logic of the cellular handset; and
continuously applying the variable supply voltage to a transmitter power amplifier of the cellular handset for linear operation, wherein the variable supply voltage is set to minimize current drain on the transmitter power amplifier. - View Dependent Claims (26, 27)
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28. An apparatus for operating in a cellular system, the apparatus comprising:
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a transmitter automatic gain control (AGC) logic configured to predictively determine a variable supply voltage of a transmitter power amplifier; and
a voltage converter configured to continuously apply the variable supply voltage to the transmitter power amplifier for linear operation, wherein the variable supply voltage is set to minimize current drain on the transmitter power amplifier. - View Dependent Claims (29, 30)
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31. A method for adjusting a supply voltage of a power amplifier in a wireless terminal, the method comprising:
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receiving a control voltage from a processor configured to predictively output the control voltage for continuous control; and
generating, in response to the control voltage, an output voltage to variably control the supply voltage of the power amplifier for minimizing current drain. - View Dependent Claims (32, 33)
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34. An apparatus for use in a cellular handset, the apparatus comprising:
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means for receiving a control voltage from a processor configured to predictively output the control voltage for continuous control; and
means for generating, in response to the control voltage, an output voltage to variably control a supply voltage of a power amplifier for minimizing current drain. - View Dependent Claims (35, 36)
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Specification