Switchable Resonant Power Converter for High Efficiency Amplifiers
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Solution Overview
Problem
Existing power amplifiers face challenges in maintaining high efficiency and reducing signal distortion, particularly when dealing with signals of high peak to average power ratio and wide bandwidth, due to limitations in drain voltage control and power supply efficiency.
Innovation Solution
The implementation of a system with a power converter featuring a switch network, resonant tanks, and a controller that adjusts switching frequency or duty cycle to maintain performance, along with a resonant mode selection block to optimize the system's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the voltage of drain power supply is changed according to the envelope of the signal to improve power efficiency, then power efficiency is improved, but signal distortion increases when the signal envelope has high bandwidth
Solution Approach 1:
The patent implements dynamic switching between two drain power supply voltages (first and second voltages) based on the envelope of the signal. The power supply voltage is dynamically adjusted to match the signal envelope, improving power efficiency while maintaining signal integrity through controlled switching transitions.
Solution Approach 2:
The patent changes the voltage parameter of the drain power supply between two discrete levels (first voltage and second voltage) according to the signal envelope detection. This parameter switching enables high efficiency operation while avoiding the distortion issues associated with continuous voltage adjustment at high bandwidths.
2Manufacturing precision
If the control bandwidth of the power supply is increased to match the signal bandwidth, then signal distortion is reduced, but the efficiency of the power supply decreases and the burden on the power supply increases
Solution Approach 1:
The patent uses dynamic voltage switching based on envelope detection rather than continuous bandwidth-matched control. This dynamic approach achieves low distortion for high bandwidth signals while maintaining high power supply efficiency by operating at discrete voltage levels with simple switching control.
Solution Approach 2:
The patent segments the power supply control into discrete voltage levels (first and second voltages) switched based on envelope thresholds. This segmentation avoids the need for high-bandwidth continuous control, reducing the burden on the power supply while maintaining signal fidelity.
3Loss of energy
If continuous voltage adjustment of the drain power supply is used to follow the signal envelope, then power efficiency is improved, but the complexity of the control system increases
Solution Approach 1:
The patent uses discrete parameter switching (two voltage levels) instead of continuous voltage adjustment. This simplifies the control system by requiring only threshold-based switching logic rather than complex continuous control circuits, while still achieving high power efficiency through envelope-following operation.
Solution Approach 2:
The patent implements simple dynamic switching between two voltage states based on envelope detection thresholds. This dynamic binary control approach achieves efficient envelope tracking with minimal control complexity, avoiding the need for complex continuous voltage regulation circuits.
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 approach enhances power amplifier efficiency and reduces signal distortion by effectively managing the drain voltage and bandwidth, thereby improving overall system performance and reducing the need for complex predistortion techniques.
Implementation Method 1
a first resonant tank having a first resonant capacitor and a first resonant inductor
Data Source
AI summary
A system includes an input port having an input voltage, an output port having an output voltage, and a power converter having a switch network with a plurality of power switches and a first resonant tank having a first resonant capacitor and a first resonant inductor, where at least one resonant component within the first resonant capacitor and the first resonant inductor is a switchable component configured to switch between different values. The system further includes a resonant mode selection block configured to adjust a value of the switchable component to maintain a performance of the system, and a controller configured to adjust a switching frequency or a duty cycle of the power converter.