Power amplifier with provisions for varying operating voltage based upon power amplifier output power
First Claim
Patent Images
1. A personal communications device comprising:
- a supply input for receiving a power supply voltage;
a power amplifier unit;
a controller;
a voltage regulator for receiving a power supply voltage input via the supply input and outputting a operating voltage supply to the power amplifier;
a current monitor for measuring the current flow of the operating voltage supply output to the power amplifier unit and outputting a current indicator signal;
the controller receives the current indicator signal and generates a control signal in accordance with the current indicator signal; and
the voltage regulator adjusts the operating voltage supply in accordance with the control signal.
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Abstract
A power amplifier system is disclosed in which a power amplifier unit and a power amendment unit are provided. An operating voltage is applied to the power amplifier unit. The power management unit monitors the current drawn by the power amplifier unit and generates a control signal based upon the measured current. The operating voltage applied to the power amplifier unit is adjusted based upon the control signal.
70 Citations
47 Claims
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1. A personal communications device comprising:
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a supply input for receiving a power supply voltage;
a power amplifier unit;
a controller;
a voltage regulator for receiving a power supply voltage input via the supply input and outputting a operating voltage supply to the power amplifier;
a current monitor for measuring the current flow of the operating voltage supply output to the power amplifier unit and outputting a current indicator signal;
the controller receives the current indicator signal and generates a control signal in accordance with the current indicator signal; and
the voltage regulator adjusts the operating voltage supply in accordance with the control signal. - View Dependent Claims (2, 3, 4, 5, 37, 38)
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6. A personal communications device comprising:
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a supply input for receiving a power supply voltage;
a power amplifier unit;
a regulator for receiving a power supply voltage input via the supply input and outputting a operating voltage supply to the power amplifier unit;
the power amplifier unit further comprises a current monitor for measuring the current flow of the operating voltage supply output to the power amplifier unit and outputting a current indicator signal in accordance therewith;
the power amplifier unit further comprises a controller for receiving the current indicator signal and generating a control signal in accordance with the current indicator signal; and
the voltage regulator adjusts the operating voltage supply in accordance with the control signal. - View Dependent Claims (7, 8, 9, 10, 39, 40)
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11. A power amplifier unit comprising:
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a power amplifier;
an input for receiving an operating supply voltage to power the power amplifier;
a current monitor for monitoring the current flow of the operating supply voltage and outputting a current flow signal based upon the measured current flow;
a look-up table (LUT) for correlating the measured current flow with the current flow signal; and
a controller for outputting a control signal in accordance with the LUT and the current flow signal. - View Dependent Claims (12, 13, 14, 15, 20, 45)
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16. A power amplifier unit comprising:
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a power amplifier;
an input for receiving a supply voltage;
a current monitor for monitoring the current flow of the operating supply voltage and outputting a current flow signal based upon the measured current flow;
controller for outputting a control signal based upon the current flow signal; and
regulator for outputting an operating voltage to the power amplifier based upon the current flow signal. - View Dependent Claims (17, 18, 19, 21, 22, 41, 42)
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23. A personal communications device comprising:
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a power amplifier unit;
a power management unit;
the power management unit comprises an input for receiving a supply voltage;
a current monitor for monitoring the current flow of an operating supply voltage applied to the power amplifier unit and outputting a current flow signal based upon the measured current flow;
controller for outputting a control signal based upon the current flow signal; and
regulator for outputting an operating voltage to the power amplifier unit based upon the current flow signal. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 43, 44)
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32. A method of applying a power supply voltage to a power amplifier unit comprising the steps of:
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applying a operating voltage to a power amplifier unit;
measuring the current drawn by the power amplifier unit;
generating a current flow signal indicative of the current drawn by the power amplifier unit;
generating a control signal based upon the current flow signal; and
adjusting the operating voltage based upon the control signal. - View Dependent Claims (33, 34, 46)
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35. A method of applying a power supply voltage to a power amplifier unit comprising the steps of:
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applying a operating voltage to a power amplifier unit;
measuring the current drawn by the power amplifier unit;
generating a current flow signal indicative of the current drawn by the power amplifier unit;
looking up a value corresponding to the current flow signal;
generating a control signal based upon the corresponding value; and
adjusting the operating voltage based upon the control signal. - View Dependent Claims (47)
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36. A personal communications device comprising:
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a power amplifier means;
a power management means;
the power management means comprises an input for receiving a supply voltage;
a means for monitoring the current flow of an operating supply voltage applied to the power amplifier unit and outputting a current flow signal based upon the measured current flow;
means for outputting a control signal based upon the current flow signal; and
means for outputting an operating voltage to the power amplifier unit based upon the current flow signal.
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Specification