Multi-Transmission Envelope Tracking for RF Amplitude Distortion
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Solution Overview
Problem
5G-capable wireless communication devices face challenges in maintaining optimal efficiency of power amplifiers due to susceptibility of RF signals to propagation attenuation and interference, especially when transmitting signals with varying peak-to-average ratios (PARs).
Innovation Solution
A multi-transmission envelope tracking (ET) circuit is introduced, featuring multiple voltage circuits generating modulated voltages for amplifying RF signals. A control circuit determines appropriate supply voltages for each voltage circuit based on the peak-to-peak range of the modulated voltage, thereby preventing amplitude distortion and improving operating efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single supply voltage is used for all voltage circuits, then device complexity is reduced, but amplitude distortion occurs and operating efficiency deteriorates
Solution Approach 1:
The patent divides the single supply voltage system into multiple segmented supply voltages (first supply voltage and second supply voltage) that are selectively applied to different voltage circuits based on their specific requirements. This segmentation allows each voltage circuit to operate with an optimized supply voltage, preventing amplitude distortion while maintaining manageable system complexity through structured voltage management.
2Reliability
If higher supply voltage is used for all voltage circuits, then amplitude distortion is prevented, but energy waste and heat dissipation increase
Solution Approach 1:
The patent applies local quality by providing different supply voltages to different voltage circuits based on their individual characteristics and requirements. Instead of uniformly applying a high supply voltage to all circuits (which causes energy waste), the system selectively applies appropriate voltage levels to each circuit, preventing amplitude distortion only where needed while minimizing overall energy consumption and heat dissipation.
3Productivity
If multiple supply voltages are provided for different voltage circuits, then operating efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic supply voltage management where the control circuit dynamically selects and switches between different supply voltages based on real-time operating conditions and signal characteristics. This dynamic approach allows the system to optimize operating efficiency by providing appropriate voltage levels only when and where needed, while the automated control mechanisms keep the added complexity manageable through adaptive rather than static voltage management.
Data Source
AI summary
A multi-transmission envelope tracking (ET) circuit is provided. The multi-transmission ET circuit includes multiple voltage circuits configured to generate multiple modulated voltages for amplifying multiple radio frequency (RF) signals, respectively. Each of the voltage circuits is configured to generate a respective modulated voltage based on a respective supply voltage so generated to prevent amplitude distortion in the respective modulated voltage. In this regard, a control circuit is provided to determine an appropriate supply voltage for each of the voltage amplifiers. In embodiments disclosed herein, the control circuit determines a respective supply voltage for each of the voltage circuits based on a respective peak-to-peak range of the respective modulated voltage. As a result, it is possible to improve operating efficiency of the voltage circuits concurrent to reducing amplitude distortion, energy waste, and heat dissipation.