Reconfigurable Doherty Amplifier Phase Adjustment Circuit
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Doherty amplifiers face challenges in efficiently adapting to various wireless communication applications due to the limitations of fixed amplifier architectures, which can lead to suboptimal performance in different scenarios, such as varying input signal ranges and gain requirements.
Innovation Solution
The implementation of a reconfigurable input phasing system in Doherty amplifiers, allowing for multiple architectures to be realized using a single set of amplifiers or IC chips, through a phase adjustment circuit with multiple phase adjustment paths, enabling flexible configuration to suit different application scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed amplifier architecture is used, then the device structure is simple, but the adaptability to different wireless communication applications is poor
Solution Approach 1:
The patent implements reconfigurable input phasing that allows the amplifier architecture to dynamically change its configuration. The phase adjustment circuit can be reconfigured to provide different input phase relationships (e.g., 0°, 90°, 180°) between carrier and peaking amplifiers, enabling the same physical device to adapt to different Doherty amplifier architectures (conventional, inverted, asymmetric) based on application requirements.
Solution Approach 2:
The patent creates a universal amplifier platform that can serve multiple application scenarios through reconfiguration. By incorporating adjustable phase shifters and reconfigurable coupling paths, a single amplifier device can implement multiple Doherty architectures (two-way, three-way, inverted, non-inverted) without requiring separate dedicated hardware for each architecture type.
2Adaptability or versatility
If multiple amplifier architectures are implemented to suit different applications, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The patent merges multiple architecture implementations into a single unified device. By integrating reconfigurable phase adjustment circuits and multiple coupling paths within one amplifier system, the patent combines the functionality of what would traditionally require separate conventional Doherty, inverted Doherty, and asymmetric Doherty amplifiers into one reconfigurable platform.
Solution Approach 2:
The patent achieves architecture transformation by changing key parameters - specifically the input phase relationship between carrier and peaking amplifiers. By adjusting phase shifter values and reconfiguring coupling paths, the same physical hardware can switch between different architectural modes (conventional with 0° phase, inverted with 180° phase, etc.) without physical reconfiguration or additional components.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An amplifier includes first, second, and third inputs to receive an RF signal, first and second amplifiers, and an input phase adjustment circuit coupling the first, second, and third inputs to the first and second amplifiers, the input phase adjustment circuit having first and second outputs coupled to the first and second amplifiers, respectively. The input phase adjustment circuit includes a pair of inputs, where the pair of inputs includes the first and second inputs, for the first output and a pair of phase adjustment paths coupling the pair of inputs to the first output, respectively. The pair of phase adjustment paths are configured to adjust a phase of the RF signal differently for the first output.