Dual Power Amplifier Switching for Discrete Voltage Efficiency
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Solution Overview
Problem
The efficiency of power amplifier circuits is decreased when using multiple discrete voltage levels for power supply, as seen in existing technologies like those described in Patent Document 1.
Innovation Solution
A power amplifier circuit design that includes two power amplifiers and a switch, allowing for the selection of power supply voltage levels based on control signals to optimize efficiency, with the switch controlling the power supply to either or both power amplifiers depending on the required voltage level for amplifying radio-frequency signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a power supply voltage of multiple discrete voltage levels is supplied to the power amplifier circuit, then power amplification efficiency is improved, but efficiency decreases due to the discrete voltage levels
Solution Approach 1:
The patent applies dynamics by making the power amplifier circuit configurable with multiple operating modes (first mode with first power amplifier only, second mode with second power amplifier only, third mode with both power amplifiers). The system dynamically switches between these modes based on control signals and power supply voltage levels, allowing the circuit to adapt its configuration to optimize efficiency under different operating conditions while avoiding the efficiency penalties of discrete voltage level transitions.
Solution Approach 2:
The patent changes the parameter of power supply voltage levels supplied to different power amplifiers. The power supply terminal can supply a first voltage level to the first power amplifier and a second voltage level (lower than the first) to the second power amplifier. This parameter change allows the system to optimize efficiency by matching voltage levels to the specific operating mode and power requirements, thereby resolving the efficiency decrease caused by uniform discrete voltage levels.
2Use of energy by moving object
If multiple power amplifiers are used with selective power supply, then efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by designing a power supply system that can serve multiple functions: it can supply voltage to the first power amplifier only, the second power amplifier only, or both simultaneously, depending on the operating mode. The power supply terminal and switch work together to provide universal power distribution capability, enabling the system to achieve high efficiency across different operating conditions without requiring separate power supply circuits for each amplifier.
Solution Approach 2:
The patent introduces a switch as an intermediary component between the power supply terminal and the second power amplifier. This switch acts as a mediator that controls the connection based on control signals, enabling selective power supply to the second power amplifier. The intermediary switch simplifies the overall control logic by providing a single point of control for enabling or disabling the second power amplifier, thereby managing device complexity while maintaining efficiency benefits.
Data Source
AI summary
A power amplifier circuit includes external input and output terminals; a first power amplifier with first input and output terminals, the first input terminal being connected to the external input terminal, the first output terminal being connected to the external output terminal; a second power amplifier having second input and output terminals, the second input terminal being connected to the external input terminal, the second output terminal being connected to the external output terminal; a power supply terminal that receives a power supply voltage that is supplied to the first power amplifier and controllably supplied to the second power amplifier; and a switch having first and second terminals, the first terminal being connected to the power supply terminal, the second terminal being connected to the second power amplifier.