Tracker Circuit Discrete Voltage Segmentation
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Solution Overview
Problem
Current digital envelope tracking (D-ET) technologies in power amplifier circuits for 5G IoT devices face challenges in further improving power efficiency, particularly in reducing power consumption and optimizing voltage supply for efficient radio frequency signal amplification.
Innovation Solution
A tracker circuit comprising switched-capacitor circuits and a supply modulator that generates and selectively outputs discrete voltages to a power amplifier, with voltage levels optimized to improve power-added efficiency by finely regulating voltages at higher frequency occurrences, while reducing the total number of discrete voltages to maintain efficiency and minimize size and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a single switched-capacitor circuit is used to generate discrete voltages, then the device complexity is reduced, but the power-added efficiency cannot be sufficiently improved due to limited voltage regulation capability
Solution Approach 1:
The patent divides the voltage generation function into two separate switched-capacitor circuits (first and second switched-capacitor circuits), each generating different sets of discrete voltages. This segmentation allows finer voltage regulation for power-added efficiency improvement while maintaining manageable complexity through modular design.
Solution Approach 2:
The patent implements dynamic voltage selection by configuring the supply modulator to selectively output different discrete voltages from the two switched-capacitor circuits based on operating conditions. This dynamic adaptation enables optimal power efficiency across varying frequency and power levels.
2Use of energy by moving object
If multiple discrete voltages are supplied to cover all frequency occurrences, then the power efficiency is improved, but the device size and power consumption increase
Solution Approach 1:
The patent segments the discrete voltage sets into two groups generated by different switched-capacitor circuits, allowing selective application of appropriate voltage levels for different frequency occurrences, thereby reducing the total number of voltages needed while maintaining efficiency.
Solution Approach 2:
Different discrete voltage levels are applied locally to match specific frequency occurrence patterns. The first and second switched-capacitor circuits generate voltages optimized for different operational conditions, ensuring efficient power delivery without providing all possible voltage levels simultaneously.
3Use of energy by moving object
If discrete voltages are supplied for digital envelope tracking, then power consumption is reduced compared to analog tracking, but further improvement in power efficiency is difficult to achieve
Solution Approach 1:
The patent introduces dynamic selection between multiple discrete voltage sets based on real-time operating conditions, enabling further power efficiency improvements beyond static digital envelope tracking by adapting voltage supply to actual frequency and power demands.
Solution Approach 2:
The patent changes the voltage supply parameters by providing two distinct sets of discrete voltages with different characteristics, allowing optimization of power efficiency through parameter selection based on operational context rather than using a single fixed voltage set.
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 power-added efficiency of the power amplifier by finely regulating voltages at higher frequency occurrences, reduces power consumption, and suppresses decreases in power efficiency, effectively addressing the limitations of existing D-ET technologies.
Implementation Method 1
a first switched-capacitor circuit configured to generate a plurality of first discrete voltages, a second switched-capacitor circuit configured to generate a plurality of second discrete voltages
Data Source
AI summary
A tracker circuit is provided that includes a first switched-capacitor circuit configured to generate a plurality of first discrete voltages, a second switched-capacitor circuit configured to generate a plurality of second discrete voltages, and a supply modulator configured to selectively output at least one of the plurality of first discrete voltages and the plurality of second discrete voltages to a power amplifier. One of the plurality of first discrete voltages has a level different from levels of the plurality of second discrete voltages, and one of the plurality of second discrete voltages has a level different from levels of the plurality of first discrete voltages.