PA Power Supply Circuit With Variable Voltage Feedback Control
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Solution Overview
Problem
The power consumption of wireless communication terminals is high due to inefficient power amplifiers, which have constant power supply voltage despite varying output power requirements, leading to low efficiency and increased power consumption.
Innovation Solution
A power supply circuit for power amplifiers that includes a DC/DC converter chip with a control circuit to adjust the voltage input based on actual requirements, using a variable control voltage that changes according to the power level and operating frequency, optimizing efficiency by minimizing the voltage input to the power amplifier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the power supply voltage of the PA is kept constant, then the circuit design is simple, but the efficiency of the PA is low and power consumption is high
Solution Approach 1:
The patent applies dynamics by making the power supply voltage variable rather than constant. The control circuit dynamically adjusts the power supply voltage to the PA based on the required output power, matching the voltage to the actual power needs. This resolves the contradiction by accepting increased circuit complexity (adding control circuitry) to achieve variable voltage operation, thereby significantly reducing power consumption and improving PA efficiency.
Solution Approach 2:
The patent changes the parameter of power supply voltage from a fixed constant to a variable parameter that can be adjusted according to power requirements. By implementing a control circuit that modifies the voltage parameter dynamically, the system achieves better energy efficiency while accepting the trade-off of increased circuit complexity.
2Loss of energy
If the power supply voltage of the PA is reduced to match lower output power requirements, then the efficiency of the PA is improved, but the voltage must be dynamically adjusted which increases control complexity
Solution Approach 1:
The patent implements feedback control where the control circuit monitors the required output power and adjusts the power supply voltage accordingly. This feedback mechanism ensures that the voltage is optimized to match actual power needs, minimizing power loss while managing control complexity through automated closed-loop regulation rather than manual adjustment.
Solution Approach 2:
The control circuit automatically adjusts the power supply voltage based on power requirements without external intervention. The system serves itself by detecting power needs and autonomously optimizing the voltage, thereby reducing power loss while the complexity is contained within the self-regulating control mechanism.
3Adaptability or versatility
If a fixed power supply voltage is used, then the circuit is simple to implement, but it cannot adapt to changes in network state and power requirements
Solution Approach 1:
The patent transforms the static fixed voltage system into a dynamic adaptive system. The control circuit enables the power supply voltage to change in response to varying network states and power requirements, providing adaptability while accepting the necessary increase in circuit structure to support this dynamic behavior.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution improves the efficiency of the power amplifier by dynamically adjusting the voltage input, reducing power loss and enhancing the overall performance of the terminal while maintaining compliance with radio frequency indices.
Implementation Method 1
a direct current/direct current converter chip, wherein an input pin IN of the direct current/direct current converter chip is connected to a power supply
Data Source
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AI summary
Embodiments of the present invention a power supply circuit of a power amplifier and disclose a terminal, relating to the communication field, to improve the efficiency of the power amplifier in the terminal and then reduce power consumption of the terminal. The power supply circuit of the power amplifier includes a direct current/direct current converter chip, where the direct current/direct current converter chip includes an input pin, an inductance pin, and a feedback pin, and the input pin is connected to a power supply and the inductance pin is connected to a voltage input end of the power amplifier through an LC storage circuit. A control circuit is connected between the voltage input end of the power amplifier and the feedback pin; the control circuit includes a control voltage, where the control voltage adjusts the voltage at the voltage input end of the power amplifier through the control circuit and the control voltage is variable. The terminal includes the power supply circuit of the power amplifier. The technical solutions provided in the embodiments of the present invention are applicable to any terminal using a power amplifier to amplify radio frequency signals.