Power Amplifier Supply Circuit With Variable Voltage Feedback
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Solution Overview
Problem
The existing power supply circuits for power amplifiers in wireless communication terminals have low efficiency due to a constant power supply voltage, which does not adapt to changing required output power, leading to increased power consumption.
Innovation Solution
A power supply circuit with a DC/DC converter chip, an LC storage circuit, and a control circuit that adjusts the voltage input to the power amplifier based on variable control voltage, allowing the voltage to change according to actual requirements, thereby improving efficiency and reducing power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a constant power supply voltage is used for the power amplifier, then the circuit structure is simple, but the power amplifier efficiency is low and power consumption is high
Solution Approach 1:
The patent applies dynamics by transforming the static constant voltage supply into a dynamic adjustable voltage supply. The power supply voltage is made variable through a control circuit that adjusts the voltage based on the required output power, allowing the system to adapt to different working conditions and improve power amplifier efficiency.
Solution Approach 2:
The patent changes the voltage parameter from a fixed constant value to a variable value that can be adjusted according to the required output power. By modifying the voltage parameter dynamically, the system achieves better matching between the power supply and the power amplifier's actual needs, reducing energy loss.
2Device complexity
If a constant power supply voltage is used for the power amplifier, then the circuit design is simple, but the efficiency of the power amplifier cannot be improved
Solution Approach 1:
The patent introduces dynamic control to the power supply circuit, enabling the voltage to be adjusted in real-time according to the power amplifier's output requirements. This dynamic adjustment mechanism allows the system to optimize efficiency without significantly complicating the overall circuit design.
Solution Approach 2:
The patent implements feedback control where the power supply voltage is adjusted based on the required output power. The control circuit receives information about the desired power level and accordingly modifies the voltage supplied to the power amplifier, creating a closed-loop system that optimizes efficiency.
3Loss of energy
If the power supply voltage is reduced to match lower output power requirements, then the power amplifier efficiency improves, but the voltage must be variable rather than constant
Solution Approach 1:
The patent makes the power supply voltage dynamic and adaptable, allowing it to vary according to the required output power. This voltage adaptability enables the system to reduce power loss by matching the supply voltage to the actual power needs of the amplifier across different operating conditions.
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
The solution enhances the efficiency of the power amplifier by adjusting the voltage input to match the required power levels, reducing power consumption and maintaining compliance with radio frequency indices.
Implementation Method 1
U1 is a direct current/direct current converter chip
Implementation Method 2
an inductance pin LX, and a feedback pin FB, where the input pin IN is configured to be connected to the power supply and the inductance pin LX is connected to a voltage input end of the power amplifier through an LC storage circuit
Data Source
AI summary
Embodiments of the present invention a power supply circuit of a power amplifier and a terminal, relating to the communication field. 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.