RF Power Amplifier Supply Voltage Control for Lower Power Loss
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Solution Overview
Problem
Radio frequency power amplifiers in communication devices experience high power loss and low efficiency when not operating at maximum power, leading to increased energy consumption and heat generation.
Innovation Solution
A voltage driving apparatus that dynamically adjusts the output voltage of the power amplifier based on variable input signals, using a control module to store and apply corresponding voltage information, reducing power loss and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed voltage supply is used for the power amplifier, then the device complexity is reduced, but the power loss increases and efficiency decreases when not operating at maximum power
Solution Approach 1:
The patent implements dynamic voltage adjustment by switching between different voltage modes (first voltage mode and second voltage mode) based on the input signal amplitude. The control module dynamically selects the appropriate voltage level, transforming the static fixed voltage supply into a dynamic adaptive system that reduces power loss while maintaining operational simplicity.
Solution Approach 2:
The patent changes the voltage parameter of the power amplifier based on the input signal characteristics. When the input signal amplitude exceeds a threshold, the amplifier operates in the first voltage mode with higher supply voltage; otherwise, it operates in the second voltage mode with lower supply voltage. This parameter change optimizes the balance between power loss and device complexity.
2Device complexity
If a fixed voltage supply is used for the power amplifier, then the device complexity is reduced, but the efficiency decreases when not operating at maximum power
Solution Approach 1:
The control module dynamically adjusts the supply voltage mode based on real-time input signal amplitude detection. This dynamic adaptation allows the power amplifier to operate at optimal efficiency points across different signal conditions, improving overall system efficiency without significantly increasing device complexity.
Solution Approach 2:
The patent implements efficiency optimization by changing the supply voltage parameter according to signal amplitude. The first voltage mode provides higher efficiency for large signal amplitudes, while the second voltage mode provides optimal efficiency for smaller signal amplitudes, thereby improving overall system productivity.
3Adaptability or versatility
If different gain modes are used for different power output requirements, then the adaptability is improved, but the power loss remains large when not at maximum power
Solution Approach 1:
The patent applies different voltage modes to different operating conditions based on input signal amplitude. Instead of using a single voltage level for all conditions, the system applies the first voltage mode locally when signal amplitude is high and the second voltage mode locally when signal amplitude is low, optimizing power loss for each specific operating condition.
Solution Approach 2:
The patent changes the supply voltage parameter based on the operating condition (input signal amplitude). This parameter change enables the system to adapt to different power output requirements while minimizing power loss by selecting the appropriate voltage mode for each signal amplitude level.
Data Source
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AI summary
A voltage driving apparatus (1) for a power amplifier, a power amplifying system, a power supply device and a communication device are disclosed. The voltage driving apparatus (1) for the power amplifier includes a voltage input module (11), a voltage output module (12), a signal input module (13), and a control module (14). The voltage output module (12) is connected to the power amplifier to provide a voltage. The signal input module (13) is configured to receive a variable input electric signal. The control module (14) is electrically connected to the voltage input module (11), the voltage output module (12), and the signal input module (13) and configured to dynamically adjust the output voltage of the voltage output module (12) according to the variable input electric signal received by the signal input module (13). The power supply device for the radio frequency power amplifier includes: a parameter detection module (21), disposed on a radio frequency transmit channel of the radio frequency power amplifier and configured to detect a system parameter on the radio frequency transmit channel; a control module (22), connected to the parameter detection module (21) and configured to determine a voltage parameter according to the system parameter detected by the parameter detection module (21); and a power supply module (23), connected to the control module (22) and configured to provide a voltage corresponding to the voltage parameter determined by the control module (22) to the radio frequency power amplifier. The voltage driving apparatus (1) and the power supply device can reduce the power loss of the power amplifier and increase the efficiency of the power amplifier.