Shared Energy Storage for Multi-Path Power Amplifiers
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Solution Overview
Problem
Conventional electronic devices require duplication of expensive circuit elements to maintain isolation between multiple power amplifiers and other components, leading to complex power supply designs due to high equivalent series resistance (ESR) in batteries, which complicates the generation of stable voltage rails and reduces performance.
Innovation Solution
Implementing a single energy storage element, such as an electric double-layer capacitor (EDLC), shared among multiple power amplifiers, audio amplifiers, and electronic flashes, with separate power converters that follow the envelope of RF signals to optimize efficiency and reduce the complexity of power supply systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated voltage source is used for each power amplifier and component, then isolation between circuits is maintained, but device complexity and cost increase due to duplication of circuit elements
Solution Approach 1:
The patent combines multiple dedicated voltage sources into a single shared voltage source that serves multiple power amplifiers and components. This merging approach reduces the number of circuit elements and simplifies the power supply architecture while maintaining proper isolation through controlled impedance routing and grounding techniques.
Solution Approach 2:
The single voltage source is designed to serve multiple functions by providing power to different components (power amplifiers, audio amplifiers, electronic flashes) simultaneously. This multi-functional approach eliminates the need for separate dedicated sources for each component while maintaining system reliability.
2Stability of the object's composition
If separate boost and buck converters are used for each transmit path, then stable voltage rails are generated, but device complexity increases
Solution Approach 1:
The patent merges separate boost and buck converters into a unified power conversion architecture that serves multiple transmit paths. This combined converter design reduces the total number of circuit elements while maintaining stable voltage rails through coordinated control of the conversion processes.
Solution Approach 2:
The unified converter system is designed to perform multiple voltage conversion functions (boost and buck) for different transmit paths simultaneously. This multi-functional converter reduces overall system complexity while delivering stable voltage rails to each power amplifier.
3Power
If high power components are powered directly from battery, then power delivery is sufficient, but voltage stability deteriorates due to high equivalent series resistance
Solution Approach 1:
The patent introduces an intermediate voltage source and power conversion stage between the battery and high power components. This intermediary architecture includes a single voltage source with controlled impedance routing that delivers stable voltage to power amplifiers while managing the high current demands, thus resolving the conflict between power delivery and voltage stability.
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 simplifies power supply designs, reduces the need for complex switch-mode converters, and allows for more accurate battery life measurement by smoothing current peaks, thereby enhancing efficiency and reducing interaction between high power components.
Implementation Method 1
a first power amplifier of the plurality of power amplifiers, a second power amplifier of the plurality of power amplifiers, an audio amplifier, and an electronic flash are supplied with a voltage from a common electric double-layer capacitor
Data Source
AI summary
Exemplary embodiments are directed to devices and methods for sharing an energy storage element within an electronic device. A device may include a plurality of transmit paths. The device may further include a voltage supply including an energy storage element coupled to each transmit path of the plurality of transmit paths.