Method of power amplifier switching power control using post power amplifier power detection
First Claim
1. A transmitter for a mobile device comprising:
- a power amplifier for generating an amplified transmission signal;
a detector coupled to an output of the power amplifier and configured to provide a detected amplified transmission signal; and
a power management block comprising;
a switching regulator control block configured to generate a switching supply control signal based on the detected amplified transmission signal; and
a switched mode power supply coupled to the switching regulator control block and configured to generate a supply voltage signal for the power amplifier based on the switching supply control signal,wherein the switching regulator control block is configured to generate the switching supply control signal having control values for the switched mode power supply that cause clipping of the amplified transmission signal thereby tracking changes in the detected amplified transmission signal with lower responsivity and improving stability.
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Accused Products
Abstract
Various embodiments described herein relate to a power management block and one or more amplification blocks used in the transmitter of a communication subsystem. The power management block provides improved control for the gain control signal provided to a pre-amplifier and the supply voltage provided to a power amplifier, both of which are included in a selected one of the amplification blocks. The power expended by the power amplifier is optimized by employing a continuous control method in which one or more feedback loops are employed to take into account various characteristics of the transmitter components and control values. Post power amplifier transmission power is detected for input into the one or more feedback loops executed in the power management block. A controller for the power amplifier is design to stabilize the system with respect to gain expansion in the power amplifier.
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Citations
20 Claims
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1. A transmitter for a mobile device comprising:
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a power amplifier for generating an amplified transmission signal; a detector coupled to an output of the power amplifier and configured to provide a detected amplified transmission signal; and a power management block comprising; a switching regulator control block configured to generate a switching supply control signal based on the detected amplified transmission signal; and a switched mode power supply coupled to the switching regulator control block and configured to generate a supply voltage signal for the power amplifier based on the switching supply control signal, wherein the switching regulator control block is configured to generate the switching supply control signal having control values for the switched mode power supply that cause clipping of the amplified transmission signal thereby tracking changes in the detected amplified transmission signal with lower responsivity and improving stability. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A mobile device comprising:
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a processor configured to control the operation of the mobile device; a transmitter coupled to the processor and configured to send and receive data, the transmitter comprising; a power amplifier for generating an amplified transmission signal; a detector coupled to an output of the power amplifier and configured to provide a detected amplified transmission signal; and a power management block comprising a switching regulator control block configured to generate a switching supply control signal based on the detected amplified transmission signal; and
a switched mode power supply coupled to the switching regulator control block and configured to generate a supply voltage signal for the power amplifier based on the switching supply control signal,wherein the switching regulator control block is configured to generate the switching supply control signal having control values for the switched mode power supply that cause clipping of the amplified transmission signal thereby tracking changes in the detected amplified transmission signal with lower responsivity and improving stability. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of providing a supply voltage signal to a power amplifier, the method comprising:
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generating an amplified transmission signal using the power amplifier; detecting an output of the power amplifier using a detector to provide a detected amplified transmission signal; generating a switching supply control using a switching regulator control block signal based on the detected amplified transmission signal; and generating the supply voltage signal by providing the switching supply control signal to a switched mode power supply; wherein the switching supply control signal has control values for the switched mode power supply that cause clipping of the amplified transmission signal thereby tracking changes in the detected amplified transmission signal with lower responsivity and improving stability. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification