Distributed Power Circuit for Fast Voltage Switching in 5G RF
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Solution Overview
Problem
Existing power management circuits in 5G-NR wireless communication devices face challenges in rapidly switching voltages across wide modulation bandwidths while minimizing in-rush current and voltage ripple, which affects battery life and signal transmission efficiency.
Innovation Solution
A distributed power management circuit that includes a voltage amplifier, voltage offset circuit, and control circuit, configured to switch voltages within a short time frame, reduce in-rush current, and minimize voltage ripple by using a distributed voltage modulation circuit with a PMIC and power amplifier circuits, where the voltage amplifier generates a modulated initial voltage and the voltage offset circuit adjusts it to meet target voltage levels within defined temporal limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional power management circuits are used to switch voltages in 5G-NR devices, then voltage switching can be performed, but the switching time is too long and in-rush current is excessive
Solution Approach 1:
The power management circuit is divided into multiple independent modules: a first power management circuit for generating initial modulated voltage, a voltage amplifier for amplifying the voltage, and a second power management circuit for adjusting the amplified voltage. This segmentation allows each module to operate independently and efficiently, reducing overall switching time and in-rush current while maintaining the ability to perform fast voltage switching across wide modulation bandwidths.
2Productivity
If voltage switching is performed quickly across wide modulation bandwidths, then data rates and signaling efficiency are improved, but voltage ripple and power consumption increase
Solution Approach 1:
The voltage amplifier is configured to amplify the initial modulated voltage in advance before it is needed by the radio frequency circuit. By performing this amplification action preliminarily, the system prepares the voltage signal ahead of time, enabling faster response to voltage switching requirements without causing excessive voltage ripple or power consumption during actual data transmission operations.
3Device complexity
If a single power management circuit is used, then device complexity is reduced, but the ability to perform fast voltage switching with reduced in-rush current is compromised
Solution Approach 1:
Each power management circuit module is designed with specific local functions: the first power management circuit is optimized for generating initial modulated voltage, the voltage amplifier is optimized for rapid voltage amplification, and the second power management circuit is optimized for fine-tuning the final voltage output. This local quality optimization allows each component to excel at its specific task, achieving fast voltage switching with reduced in-rush current while keeping the overall device complexity manageable through clear functional division.
Data Source
AI summary
A distributed power management circuit is provided. In embodiments disclosed herein, the distributed power management circuit can achieve multiple performance enhancing objectives simultaneously. More specifically, the distributed power management circuit can be configured to switch a modulated voltage from one voltage level to another within a very short switching window, reduce in-rush current required for switching the modulated voltage, and minimize a ripple in the modulated voltage, all at same time. As a result, the distributed power management circuit can be provided in a wireless device (e.g., smartphone) to enable very fast voltage switching across a wide modulation bandwidth (e.g., 400 MHz) with reduced power consumption and voltage distortion.