Frontend Module Dual-Input Switching for Power Reduction
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Solution Overview
Problem
Frontend modules in mobile radio applications consume excessive current when the maximum output power of the power amplifier is not required, leading to increased energy usage due to the need for the power amplifier to be activated even when the transmitted power is low.
Innovation Solution
Incorporating a switching unit with a bypass signal line that allows transmitted signals to bypass the amplifier stage when sufficient power is already available, enabling the power amplifier to be switched off and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the power amplifier is activated to amplify transmitted signals, then the transmitted signal power is increased, but the current consumption of the frontend module increases
Solution Approach 1:
The patent implements dynamic switching between amplifier modes based on real-time signal power requirements. The control unit monitors the transmitted signal characteristics and dynamically selects between bypass mode (for low power needs) and amplifier modes (for high power needs), allowing the system to adapt its power consumption to actual operational requirements rather than operating at fixed maximum power
Solution Approach 2:
The patent changes the operational parameters of the power amplifier by introducing multiple operating states: bypass mode (0% amplification), partial amplification mode (reduced power consumption), and full amplification mode (maximum output power). The switching unit and control unit work together to change these parameters dynamically, selecting the appropriate amplification level based on whether the transmitted power is below or above a predetermined threshold
2Power
If the power amplifier operates at maximum output power, then the transmitted signal can reach distant receivers, but the power consumption increases significantly
Solution Approach 1:
The patent applies partial amplification when full amplification is not needed. The bypass signal line and switching unit enable the system to use only the necessary portion of the power amplifier's capability - either bypassing it entirely for low-power transmissions or using it at reduced levels - thereby avoiding the excessive power consumption associated with operating at maximum output power for all transmission scenarios
3Reliability
If the amplifier stage is always active, then all transmitted signals are amplified, but the frontend module consumes more current than necessary
Solution Approach 1:
The patent extracts the power amplifier from the mandatory signal path by introducing a bypass signal line. This allows the amplifier to be removed from the active circuit path when its function is not needed, enabling low-power operation while maintaining the integrity of the transmitted signal path through the bypass route. The switching unit controls this extraction dynamically based on signal requirements
Data Source
AI summary
A frontend module includes a first and a second input for transmitted signals, an amplifier, a bypass line for bypassing the amplifier, an output and a switching unit. The switching unit either forms a signal path between the first input and the output, in which the amplifier or the bypass line is coupled, or forms a signal path between the second input and the output, in which the amplifier or the bypass line is coupled.