Multimode Power Amplifier Module with Shared RF Paths
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Solution Overview
Problem
Current multimode power amplifier modules face challenges in optimizing performance and reducing power consumption, particularly in time-division multiplexing modes like TD-SCDMA and TDD-LTE, due to the need for multiple frequency band support and varying output power requirements across different communication modes.
Innovation Solution
A multimode power amplifier module design that includes low-frequency and high-frequency power amplifier channels, a control circuit, and a transmit-receive switch, which adjusts amplifier settings such as gain mode, collector voltage, and offset signals based on the working mode to optimize performance and power efficiency across GSM, EDGE, TD-SCDMA, and TDD-LTE modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate power amplifier channels are used to support different frequency bands and modes, then the module can provide comprehensive multi-mode support, but the device complexity and implementation cost increase significantly
Solution Approach 1:
The patent merges multiple power amplifier channels (low-frequency and high-frequency PA channels) into a single integrated module structure. The control circuit dynamically configures and switches between different PA channels based on the operating mode and frequency band requirements, allowing one physical module to provide functionality that would traditionally require multiple separate modules.
Solution Approach 2:
The power amplifier module is designed with universal functionality to support multiple communication modes (GSM, EDGE, TD-SCDMA, TDD-LTE) and frequency bands through a single integrated architecture. The control circuit enables the same physical module to adaptively configure different PA channels for different operating conditions, making the module multi-functional rather than requiring mode-specific dedicated hardware.
2Adaptability or versatility
If multiple separate power amplifier channels are used to support different frequency bands, then all communication modes can be supported, but the implementation cost increases
Solution Approach 1:
The patent combines multiple power amplifier channels into a single integrated module that can be manufactured as one unified component. This merging reduces the total number of separate components needed, simplifies the bill of materials, and lowers manufacturing costs compared to implementing multiple independent power amplifier modules for different frequency bands.
Solution Approach 2:
The module is designed with universal support for multiple frequency bands and communication modes through a single hardware platform. This multi-functionality eliminates the need to manufacture and stock multiple mode-specific modules, reducing production complexity and implementation costs while maintaining comprehensive frequency band coverage.
3Device complexity
If fixed amplifier settings are used, then the module structure is simple, but performance cannot be optimized across different communication modes
Solution Approach 1:
The control circuit implements dynamic configuration of power amplifier channels based on real-time operating conditions. Instead of fixed settings, the system adaptively adjusts which PA channels are active, their gain settings, and their configuration according to the current communication mode, frequency band, and signal requirements. This dynamic approach optimizes performance for each specific operating scenario.
Solution Approach 2:
The control circuit changes operational parameters (such as gain mode, collector voltage, and offset signals) of the power amplifier channels based on the detected working mode and baseband signal characteristics. This parameter adaptation allows the same physical hardware to achieve optimized performance across different communication modes by dynamically adjusting electrical parameters rather than requiring fixed configurations.
4Reliability
If dynamic adjustment of amplifier settings is implemented, then performance is optimized for different modes, but power consumption increases
Solution Approach 1:
The control circuit implements dynamic adjustment of power amplifier settings only when necessary to maintain optimal performance. By dynamically switching between different PA channels and adjusting parameters based on actual operating conditions, the system avoids continuous full-power operation and reduces overall power consumption while maintaining performance optimization.
Solution Approach 2:
The control circuit adjusts operational parameters such as collector voltage and gain mode based on the current working mode and signal requirements. For example, it may use lower voltage modes for TDD-LTE and adjust offset signals according to baseband signal magnitudes, thereby optimizing performance for each mode while minimizing power consumption through parameter adaptation rather than fixed high-power operation.
Data Source
AI summary
A multimode power amplifier module, a chip and a communication terminal. In the module, a control circuit (104) sends a bias signal to a low-frequency power amplifier (102) or a high-frequency power amplifier (106) according to a baseband signal, so as to control the amplification of an accessed low-frequency radio frequency signal or a high-frequency radio frequency signal by the low-frequency power amplifier (102) or the high-frequency power amplifier (106); and a transceiving switch (108) selects a corresponding operation mode to conduct transmission or receiving according to an operation mode selection signal. A power amplification path is reused according to different modes, so that the power amplification path can be shared by different operation modes of a high and low frequency band with the adjustment of the control circuit (104), thus simplifying the complexity in designing the power amplifier module, and reducing the cost of relevant design implementation.