Multi-PA Envelope Tracking IC Layout for Lower PMIC Footprint
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional 5G-NR mobile communication devices employing multiple power management integrated circuits (PMICs) for envelope tracking (ET) face challenges with increased footprint, power consumption, and heat dissipation due to the need for multiple PMICs to generate ET voltages for multiple power amplifiers.
Innovation Solution
A single ET integrated circuit (ETIC) is used to provide multiple ET voltages to multiple power amplifiers, with multiple first ET voltage circuits coupled in parallel and a second ET voltage circuit, configured to generate respective ET voltages for output and driver stage amplifiers, reducing the need for multiple PMICs and thereby minimizing footprint, power consumption, and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple PMICs are employed to generate ET voltages for multiple power amplifiers, then each power amplifier can be provided with dedicated ET voltage, but the footprint, power consumption, and heat dissipation increase
Solution Approach 1:
The patent merges multiple separate PMICs into a single integrated ET power management device that can generate and supply ET voltages to multiple power amplifiers. This single device integrates the functionality of what would traditionally require multiple discrete PMICs, thereby reducing the overall footprint while maintaining the ability to provide dedicated ET voltage tracking to each power amplifier.
Solution Approach 2:
The single ET power management device is designed with multi-functionality to serve multiple power amplifiers simultaneously. It includes multiple voltage output channels that can independently track different power envelope signals, allowing one device to perform the function of multiple dedicated PMICs while reducing the total component count and footprint.
2Reliability
If multiple PMICs are employed to generate ET voltages for multiple power amplifiers, then each power amplifier can be provided with dedicated ET voltage, but the power consumption increases
Solution Approach 1:
By consolidating multiple PMIC functions into a single integrated device, the patent reduces the total power consumption associated with having multiple separate power management circuits. The shared architecture and common control logic in the single device eliminate redundant overhead that would exist in multiple discrete PMICs.
Solution Approach 2:
The multi-functional ET power management device efficiently manages power for multiple power amplifiers using shared resources such as voltage references, control logic, and signal processing circuits, thereby reducing the total power consumption compared to having dedicated PMICs for each amplifier.
3Reliability
If multiple PMICs are employed to generate ET voltages for multiple power amplifiers, then each power amplifier can be provided with dedicated ET voltage, but the heat dissipation increases
Solution Approach 1:
The patent consolidates heat-generating PMIC components into a single integrated device, which improves thermal management by concentrating heat sources in one location that can be more effectively cooled. This reduces the overall heat dissipation burden compared to having multiple scattered heat sources from multiple PMICs.
4Area of stationary object
If a single ETIC is used to provide multiple ET voltages to multiple power amplifiers, then the footprint, power consumption, and heat dissipation are reduced, but the device complexity increases
Solution Approach 1:
The single ET power management device is internally segmented into multiple independent voltage output channels, each capable of independently tracking power envelopes for different power amplifiers. This segmentation allows the device to maintain simplicity at the channel level while achieving functionality equivalent to multiple separate PMICs.
Solution Approach 2:
The device incorporates universal control logic and signal processing circuits that can serve multiple power amplifiers simultaneously, reducing the need for duplicate functionality and thereby managing internal complexity more efficiently while providing multi-channel ET voltage output.
Data Source
AI summary
An envelope tracking (ET) power management apparatus incorporating multiple power amplifiers is provided. The ET power management apparatus includes a single ET integrated circuit (ETIC) configured to provide multiple ET voltages to the multiple power amplifiers for amplifying a radio frequency (RF) signal concurrently. The ETIC includes multiple first ET voltage circuits configured to generate multiple first ET voltages and a second ET voltage circuit configured to generate a second ET voltage. The ETIC is configured to provide each of the first ET voltages to an output stage amplifier(s) in a respective one of the power amplifiers and provide the second ET voltage to a driver stage amplifier in all of the power amplifiers. By supporting the multiple power amplifiers using a single ETIC, it is possible to reduce footprint, power consumption, and heat dissipation in an electronic device employing the ET power management apparatus.