Absolute power detector
8 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus is provided for detecting the output power of a power amplifier. The output power is detected by detecting the absolute values of the voltage and current at the output of the amplifier and mixing the detected voltage and current to generate a signal related to the output power.
27 Citations
58 Claims
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1-40. -40. (canceled)
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41. An RF power amplifier for a wireless communication system comprising:
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a power amplifier having an output;
a voltage sensor coupled to the power amplifier for sensing the voltage at the output of the power amplifier;
a current sensor coupled to the power amplifier for sensing the current at the output of the power amplifier; and
a circuit coupled to the voltage sensor and current sensor for controlling the output power of the power amplifier, wherein the circuit controls the output power of the power amplifier based on the magnitudes of the voltage and current at the output of the power amplifier. - View Dependent Claims (42, 43, 44, 45, 49)
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- 46. The RF power amplifier of cairn 41, wherein the current sensor is comprised of first and second mutually coupled inductors.
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50. A circuit for controlling the output power of an RF power amplifier used with a wireless communication system comprising:
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circuitry for sensing the voltage at the output of the RF power amplifier;
circuitry for determining the magnitude of the sensed voltage;
circuitry for sensing the current at the output of the RF power amplifier;
circuitry for determining the magnitude of the sensed current; and
circuitry for controlling the output power of an RF power amplifier based on the magnitude of the voltage at the output of the RF power amplifier and the magnitude of the current at the output of the RF power amplifier. - View Dependent Claims (51, 52, 53, 54)
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55. A method of controlling the output power of an RF power amplifier used with a wireless communication system, the method comprising:
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sensing the magnitude of the voltage at the output of the power amplifier;
sensing the magnitude of the current at the output of the power amplifier; and
controlling the output power of the power amplifier based on the sensed magnitudes of the voltage and current, and based on a desired output power level. - View Dependent Claims (56, 57, 58)
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Specification