Single Power Amplifier Bias Switching for Multi-Band RF Circuits
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Solution Overview
Problem
Existing radio frequency circuits that simultaneously handle signals from different mobile communication systems or frequency bands require multiple circuit elements, leading to increased size and complexity, which is not efficiently addressed by existing technologies.
Innovation Solution
A radio frequency circuit design that includes a single power amplifier capable of selectively amplifying radio frequency signals with different bandwidths by applying distinct bias signals based on the input signal's bandwidth, using a configuration with switches and bias power supplies optimized for each communication system or band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple circuit elements are disposed in separate primary and secondary circuits to handle different communication systems or frequency bands, then the radio frequency circuit can simultaneously transfer signals from multiple systems, but the number of circuit elements increases resulting in increased size
Solution Approach 1:
The patent merges multiple amplifiers into a single amplifier that can selectively amplify signals from different communication systems (4G and 5G) by applying different bias signals. This consolidation reduces the number of circuit elements from multiple amplifiers to one, thereby decreasing the overall size of the radio frequency circuit while maintaining the capability to handle multiple communication systems simultaneously.
Solution Approach 2:
The single amplifier is designed with multi-functionality to amplify both 4G and 5G signals by receiving different bias signals corresponding to different communication systems. This universal amplifier replaces what would traditionally require separate dedicated amplifiers for each communication system, achieving size reduction while preserving adaptability.
2Adaptability or versatility
If multiple circuit elements are disposed in separate primary and secondary circuits to handle different frequency bands, then the radio frequency circuit can transfer signals across different communication bands, but the number of circuit elements increases resulting in increased size
Solution Approach 1:
The patent consolidates multiple amplifiers into one amplifier that can handle different frequency bands (communication bands) by applying appropriate bias signals. This merging approach reduces the circuit element count and overall circuit size while maintaining the ability to transfer signals across different communication bands.
Solution Approach 2:
The amplifier is designed as a universal component capable of operating across different frequency bands through bias signal control. This multi-functional design eliminates the need for separate amplifiers for each frequency band, achieving compact circuit size while preserving band versatility.
3Reliability
If separate amplifiers are used for different communication systems, then each signal can be amplified with optimal performance, but the number of amplifiers increases resulting in increased power consumption
Solution Approach 1:
The patent merges multiple amplifiers into a single amplifier that maintains optimal amplification performance for different communication systems through bias signal control. This consolidation reduces the total power consumption compared to having multiple separate amplifiers, as one amplifier consumes less power than multiple amplifiers operating simultaneously.
Solution Approach 2:
The universal amplifier achieves optimal amplification performance for both 4G and 5G signals by receiving system-specific bias signals. This multi-functional approach allows a single amplifier to replace multiple amplifiers, thereby reducing overall power consumption while maintaining high amplification performance across different communication systems.
Data Source
AI summary
A radio frequency circuit includes a power amplifier configured to selectively amplify one of a first radio frequency signal and a second radio frequency signal that have different bandwidths, and when the first radio frequency signal is input to the power amplifier, a first bias signal is applied to the power amplifier, and when the second radio frequency signal is input to the power amplifier, a second bias signal different from the first bias signal is applied to the power amplifier.