RF Power Amplifier Mode Switching for Mixed Channel Bandwidths
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Solution Overview
Problem
Radio-frequency circuits face high power consumption when amplifying signals with wide bandwidths, particularly when using the average power tracking method for both narrow and wide channel bandwidth signals, leading to increased signal distortion and power inefficiency.
Innovation Solution
A radio-frequency circuit configuration that uses the average power tracking method for signals with narrow channel bandwidths and the envelope tracking method for signals with wide channel bandwidths, allowing for optimized power amplification and reduced signal distortion across different communication bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the average power tracking method is used to amplify radio-frequency signals with wide channel bandwidth, then the circuit complexity is reduced, but the power consumption of the power amplifying circuit becomes high
Solution Approach 1:
The patent applies dynamics by making the amplification mode adjustable and switchable based on signal characteristics. The power amplifying circuit can dynamically switch between average power tracking mode and envelope tracking mode depending on the channel bandwidth of the input signal, allowing the system to adapt its operation to minimize power consumption while maintaining circuit simplicity.
Solution Approach 2:
The patent changes the operational parameter (amplification mode) based on the signal parameter (channel bandwidth). By detecting whether the input signal has a narrow or wide channel bandwidth, the system selects the appropriate amplification mode (average power tracking or envelope tracking), thereby optimizing power consumption for different operating conditions.
2Device complexity
If the average power tracking method is used for wide channel bandwidth signals, then the circuit configuration is simplified, but signal distortion increases and efficiency decreases
Solution Approach 1:
The system dynamically selects the amplification mode based on the input signal's channel bandwidth. For wide channel bandwidth signals, envelope tracking mode is selected to maintain signal quality, while for narrow channel bandwidth signals, average power tracking mode is used to simplify the circuit operation. This dynamic adaptation ensures optimal signal quality across different operating conditions.
Solution Approach 2:
The patent changes the amplification mode parameter according to the channel bandwidth parameter of the input signal. This parameter-based selection allows the system to use envelope tracking (which maintains better signal quality) for wide bandwidth signals and average power tracking (which is simpler) for narrow bandwidth signals, thereby resolving the contradiction between circuit simplicity and signal quality.
3Ease of operation
If a single amplification mode is used for all channel bandwidths, then the ease of operation is improved, but the adaptability to different communication bands is reduced
Solution Approach 1:
The power amplifying circuit is designed with multi-functionality by supporting both average power tracking mode and envelope tracking mode. The circuit can universally handle different channel bandwidth requirements by automatically selecting the appropriate mode, making it adaptable to various communication bands while maintaining ease of operation through automated mode selection.
Solution Approach 2:
The system achieves adaptability through dynamic mode switching based on the input signal characteristics. The automatic detection of channel bandwidth and corresponding selection of amplification mode provides versatility for different communication bands while keeping the operation simple for the user, as the switching is performed automatically without manual intervention.
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 average power tracking method, and to amplify the second radio-frequency signal in an amplifying mode according to an envelope tracking method.