Shared DC/DC Power Switching for Multi-Band SPT Amplifiers
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Solution Overview
Problem
The existing symbol power tracking (SPT) amplification systems require multiple voltage output circuits, leading to increased circuit scale when applied to systems with multiple amplification circuits, which complicates the design and efficiency of multi-band compatible front-end portions in communication devices.
Innovation Solution
A compact amplification system and method that employs a single set of DCDC converters and switches to selectively switch between different power supply voltages for each amplification circuit, allowing for efficient operation in both SPT and average power tracking (APT) modes, thereby reducing the number of required voltage output circuits and circuit complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple voltage output circuits are used for each amplification circuit, then each amplification circuit can operate independently with dedicated power supply, but the circuit scale increases significantly when applied to systems with multiple amplification circuits
Solution Approach 1:
The patent combines multiple voltage output circuits into a shared resource pool that can be dynamically allocated to multiple amplification circuits. Instead of dedicating separate DCDC converters to each amplification circuit, the system uses a pool of voltage output circuits that can serve multiple amplification circuits through selective switching, thereby reducing the overall circuit scale while maintaining independent operation capability.
Solution Approach 2:
The voltage output circuits are designed to serve multiple functions and multiple amplification circuits. A single voltage output circuit can be dynamically assigned to different amplification circuits based on operational requirements, making the power supply system universal and adaptable rather than dedicated and fixed.
2Productivity
If multiple voltage output circuits are used for SPT operation, then efficient power supply switching can be achieved, but the number of required circuits increases when scaling to multiple amplification circuits
Solution Approach 1:
Multiple voltage output circuits are merged into a shared pool that serves multiple amplification circuits. The switching mechanism allows efficient power supply allocation without requiring a dedicated voltage output circuit for each amplification circuit, thus reducing the total quantity of voltage output circuits needed while maintaining SPT operational efficiency.
Solution Approach 2:
The system implements dynamic allocation of voltage output circuits to amplification circuits based on real-time operational needs. This dynamic switching capability enables efficient power supply management without requiring static dedicated connections, allowing the same voltage output circuit to serve different amplification circuits at different times.
Data Source
AI summary
An amplification system configured to perform SPT and includes a DC/DC converter configured to output a power supply voltage Vcc1, a DC/DC converter configured to output a power supply voltage Vcc2, power amplifiers, and a switch configured to, in a first mode, selectively perform switching between a connection of the DC/DC converter and the power amplifier and a connection of the DC/DC converter and the power amplifier and, in a second mode, connect the DC/DC converter and the power amplifier and connect the DC/DC converter and the power amplifier.