Power Distribution Network With Multiple Charge Storage Components
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Solution Overview
Problem
Power distribution networks with a single charge storage component suffer from voltage ripple and electromagnetic interference due to pulsed high-current draws from radio frequency power amplifier circuits, leading to undesirable effects like audible buzz and interference with other devices.
Innovation Solution
Dividing the power supply into multiple charge storage components, such as dual batteries or a combination of batteries and supercapacitors, with a converter and electromagnetic interference filter to buffer high currents and regulate voltage, reducing ripple and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single charge storage component is used in the power distribution network, then the device complexity is reduced, but voltage ripple and electromagnetic interference increase due to pulsed high-current draws
Solution Approach 1:
The power distribution network is segmented into multiple charge storage components (first and second charge storage components) that operate in parallel. This segmentation allows each component to handle portions of the pulsed high-current draws, reducing the ripple and electromagnetic interference generated by any single component while maintaining the overall power supply function.
2Object-affected harmful factors
If multiple charge storage components are used to reduce voltage ripple, then the harmful factors are reduced, but the device complexity increases
Solution Approach 1:
Multiple charge storage components are merged into a unified power distribution architecture where they operate in parallel with shared connections to the power supply common voltage and the power amplifier circuit. This merging approach reduces voltage ripple through distributed capacitance while managing complexity through a standardized parallel configuration rather than complex series arrangements.
3Loss of energy
If charge storage components buffer high currents, then power amplifier efficiency is improved, but the device complexity increases due to additional converters and filters
Solution Approach 1:
Charge storage components are introduced as intermediary elements between the power source and the power amplifier circuit. These intermediaries buffer high currents by absorbing and releasing charge during pulsed operation, reducing the current stress on the power amplifier and improving its efficiency. The converters and EMI filters serve as additional intermediaries to condition the power output.
Solution Approach 2:
The harmful high-frequency current fluctuations and electromagnetic interference are extracted from the main power delivery path through dedicated EMI filters. These filters selectively remove the problematic frequency components while allowing the essential power delivery function to continue, thereby separating the power delivery function from the noise filtering function.
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 significantly reduces power supply ripple, improves power amplifier efficiency, and minimizes electromagnetic interference, allowing for improved linearity and reduced complexity in power amplifier design while maintaining consistent voltage for better device performance.
Implementation Method 1
a first charge storage component having a first terminal connected to the charging circuit and a second terminal connected to a power supply common voltage
Implementation Method 2
an electromagnetic interference filter having an input terminal and an output terminal, the input terminal of the electromagnetic interference filter receiving, from the output terminal of the converter, the output voltage
Implementation Method 3
a converter having an input terminal and an output terminal, the input terminal receiving an input voltage from the first terminal of the first charge storage component, and the output terminal supplying an output voltage, wherein a magnitude of the output voltage is altered relative to a magnitude of the input voltage
Data Source
AI summary
A power distribution network includes multiple charge storage components and multiple charging circuits to control the charging and discharging of the charge storage components, which may comprise a battery and a supercapacitor. By appropriate arrangement and selection of the storage components, ripple in the power supply voltage, whose propagation to other components relying on the power distribution network may cause an audible buzz, may be significantly reduced. Additionally, appropriate arrangement and selection of the storage components, electromagnetic interference may also be significantly reduced. Optionally, an electromagnetic interference filter may be placed between the charge storage components.