Control of switcher regulated power amplifier modules
First Claim
1. A control system for a transmitter of a wireless device, the transmitter having a pre-amplifier and a power amplifier coupled to an output of the pre-amplifier, the control system comprising:
- a signal input for receiving a detection signal representative of a pre-amplified transmission signal sensed at the output of the pre-amplifier by a detector;
a switching regulator control block configured to generate a switching supply control signal by applying a switching control transfer function to the received detection signal, the switching supply control signal comprising control values for a switched mode power supply configured to generate a supply voltage signal for the power amplifier in response to the switching supply control signal, and the switching control transfer function having values determined based on a characterization of the response of the detector, control curves of the switched mode power supply, and a response of the power amplifier to input drive; and
a signal output for providing the switching supply control signal to the switched mode power supply;
wherein, in operation, the switching regulator control block communicates with the detector using the signal input and with the switched mode power supply using the signal output.
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Accused Products
Abstract
Various embodiments described herein relate to a power management block and an amplification block 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 which are both in the amplification block. 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.
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Citations
23 Claims
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1. A control system for a transmitter of a wireless device, the transmitter having a pre-amplifier and a power amplifier coupled to an output of the pre-amplifier, the control system comprising:
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a signal input for receiving a detection signal representative of a pre-amplified transmission signal sensed at the output of the pre-amplifier by a detector; a switching regulator control block configured to generate a switching supply control signal by applying a switching control transfer function to the received detection signal, the switching supply control signal comprising control values for a switched mode power supply configured to generate a supply voltage signal for the power amplifier in response to the switching supply control signal, and the switching control transfer function having values determined based on a characterization of the response of the detector, control curves of the switched mode power supply, and a response of the power amplifier to input drive; and a signal output for providing the switching supply control signal to the switched mode power supply; wherein, in operation, the switching regulator control block communicates with the detector using the signal input and with the switched mode power supply using the signal output. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of controlling a transmitter of a wireless device, the transmitter having a pre-amplifier and a power amplifier coupled to an output of the pre-amplifier, the method comprising:
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receiving a detection signal representative of a pre-amplified transmission signal sensed at the output of the pre-amplifier by a detector; generating a switching supply control signal by applying a switching control transfer function to the received detection signal, the switching supply control signal comprising control values for a switched mode power supply configured to generate a supply voltage signal for the power amplifier in response to the switching supply control signal, and the switching control transfer function having values determined based on a characterization of the response of the detector, control curves of the switched mode power supply, and a response of the power amplifier to input drive; and providing the switching supply control signal to the switched mode power supply. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A non-transitory computer-readable storage medium storing instructions executable by a processor coupled to the storage medium, the instructions, when executed by the processor, cause the processor to perform acts of a method of controlling a transmitter of a wireless device, the transmitter having a pre-amplifier and a power amplifier coupled to an output of the pre-amplifier, said acts comprising:
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receiving a detection signal representative of a pre-amplified transmission signal sensed at the output of the pre-amplifier by a detector; generating a switching supply control signal by applying a switching control transfer function to the received detection signal, the switching supply control signal comprising control values for a switched mode power supply configured to generate a supply voltage signal for the power amplifier in response to the switching supply control signal, and the switching control transfer function having values determined based on a characterization of the response of the detector, control curves of the switched mode power supply, and a response of the power amplifier to input drive; and providing the switching supply control signal to the switched mode power supply. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification