APT Power Supply Circuit for Multi-Band PA Voltage Sharing
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Solution Overview
Problem
Existing average power tracking (APT) schemes for power amplifiers become oversized when simultaneously sending radio frequency signals in multiple bands, as they require multiple power supply voltages, leading to increased complexity and size.
Innovation Solution
A small average power tracking module and circuit that supplies a single power supply voltage to multiple power amplifiers using a converter circuit and switches, allowing simultaneous operation of multiple radio frequency signals without the need for multiple power supply voltages, with a control circuit managing the power distribution based on output power feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple power supply voltages are supplied to multiple power amplifiers for simultaneous multi-band signal transmission, then the power amplification capability is improved, but the module size increases
Solution Approach 1:
The patent merges multiple power supply voltage outputs into a single integrated module. The power supply module includes a DC-DC converter that can generate multiple different power supply voltages internally, then distributes them through separate output terminals. This consolidation reduces the overall module size compared to using multiple separate power supply modules, while still providing the necessary multiple voltages for simultaneous multi-band signal transmission.
Solution Approach 2:
The power supply module is designed with multi-functionality to serve multiple power amplifiers simultaneously. The DC-DC converter can generate multiple different power supply voltages based on different output power levels, and the module can supply these voltages to multiple power amplifiers at the same time. This universal design eliminates the need for separate dedicated power supply modules for each amplifier or band.
2Reliability
If multiple separate power supply modules are used for multiple power amplifiers, then each amplifier receives dedicated power supply, but the overall circuit complexity increases
Solution Approach 1:
The patent combines multiple power supply functions into a single integrated module. Instead of using multiple separate power supply modules, the invention uses one power supply module containing a DC-DC converter that can generate multiple different voltages. This reduces circuit complexity by eliminating redundant components and interconnections while maintaining reliable power supply to all power amplifiers.
Solution Approach 2:
The power supply module incorporates feedback mechanisms where the control circuit receives output power level information from the power amplifiers and adjusts the generated power supply voltages accordingly. This feedback control ensures that each power amplifier receives the appropriate voltage for its operating condition, maintaining reliability while using a unified power supply architecture rather than multiple independent modules.
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 configuration simplifies the circuit design, reduces size, and enables efficient simultaneous transmission of multiple radio frequency signals by using a single power supply voltage, improving power amplification operations while maintaining performance.
Implementation Method 1
a converter circuit configured to output a first voltage to the first output terminal and the second output terminal
Data Source
AI summary
An APT module is provided that includes a converter circuit that outputs a power supply voltage, output terminals to which the power supply voltage is applied, a FB terminal connected to a signal path connecting the output terminal and power amplifiers, a FB terminal connected to a signal path connecting the output terminal and power amplifiers, and a control circuit connected to the FB terminals and the converter circuit.