RF Power Amplifier Tracking Modes for Wideband Distortion
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Solution Overview
Problem
Radio-frequency circuits face significant signal distortion when amplifying signals with wide bandwidths, particularly in power amplification modules using envelope tracking methods, which affects the quality of multiband and multimode communication.
Innovation Solution
A radio-frequency circuit design that employs a power amplifying circuit capable of switching between envelope tracking and average power tracking methods based on the channel bandwidth of the signal, amplifying signals with narrower bandwidths using envelope tracking for low power consumption and those with wider bandwidths using average power tracking to reduce distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If envelope tracking method is used to amplify radio-frequency signals, then power consumption is reduced, but signal distortion increases for wide bandwidth signals
Solution Approach 1:
The power amplifying circuit dynamically switches between envelope tracking mode and average power tracking mode based on the channel bandwidth of the input signal. For narrow bandwidth signals, envelope tracking is used to minimize power consumption, while for wide bandwidth signals, average power tracking is used to minimize distortion, thus adaptively optimizing performance based on signal characteristics
Solution Approach 2:
The invention changes the amplification mode parameter based on the channel bandwidth parameter. By detecting the channel bandwidth and selecting the appropriate amplification mode (envelope tracking or average power tracking), the system optimizes the trade-off between power consumption and signal distortion for different signal conditions
2Manufacturing precision
If average power tracking method is used to amplify radio-frequency signals with wide bandwidth, then signal distortion is reduced, but power consumption increases
Solution Approach 1:
The system dynamically selects the amplification mode based on real-time signal characteristics. Average power tracking is activated only when needed for wide bandwidth signals, while envelope tracking is used for narrow bandwidth signals, thus reducing overall power consumption while maintaining signal quality when necessary
Solution Approach 2:
The amplification mode parameter is changed based on the channel bandwidth parameter of the input signal. This adaptive parameter change allows the system to use the more power-efficient envelope tracking method whenever possible, while switching to average power tracking only when signal distortion needs to be minimized for wide bandwidth signals
Data Source
AI summary
A radio-frequency circuit includes a power amplifying circuit configured to amplify a first radio-frequency signal having a first channel bandwidth and a second radio-frequency signal having a second channel bandwidth greater than the first channel bandwidth. The power amplifying circuit is configured to amplify the first radio-frequency signal in an amplifying mode according to an envelope tracking method, and to amplify the second radio-frequency signal in an amplifying mode according to an average power tracking method.