N-Way Doherty Amplifier Output Network for Dynamic Peak Activation
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Solution Overview
Problem
Conventional Doherty amplifiers face inefficiencies in power consumption and amplification due to fixed configurations of amplifiers, which do not dynamically adjust according to signal amplitude, leading to suboptimal performance and increased power consumption.
Innovation Solution
An N-way Doherty amplifier configuration with a main amplifier and (N-1) peak amplifiers, where the number of active peak amplifiers changes based on signal amplitude, using a single DC bias voltage and adjustable output networks to optimize amplification and harmonic impedance, with additional bias networks for enhanced control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed configuration of amplifiers is used in conventional Doherty amplifiers, then the circuit structure is simple, but power consumption is high and amplification efficiency is suboptimal
Solution Approach 1:
The patent implements dynamic amplifier configuration where the number of active peak amplifiers changes based on signal amplitude. The control unit dynamically switches amplifiers on or off according to the instantaneous signal level, transitioning from a static to a dynamic system. This resolves the contradiction by allowing the system to adapt its complexity and power consumption to the actual signal conditions, achieving low power consumption while maintaining manufacturing feasibility through standardized switching mechanisms.
Solution Approach 2:
The patent changes the operational parameter of the amplifier system by dynamically adjusting the number of active amplifiers based on signal amplitude thresholds. When signal amplitude exceeds certain thresholds, additional peak amplifiers are activated. This parameter change enables the system to optimize power consumption by activating only the necessary number of amplifiers for each signal level, while maintaining a relatively simple circuit structure through threshold-based control logic.
2Ease of manufacture
If a fixed configuration of amplifiers is used in conventional Doherty amplifiers, then the circuit structure is simple, but amplification efficiency is suboptimal
Solution Approach 1:
The system dynamically adjusts the number of active peak amplifiers based on signal amplitude, enabling the amplifier configuration to adapt to varying signal conditions. This dynamic approach improves amplification efficiency by ensuring that sufficient amplification capacity is available for high-power signals while maintaining simple circuit structure through standardized amplifier modules and threshold-based control logic.
Solution Approach 2:
The patent employs multiple peak amplifiers that can be selectively activated based on signal amplitude requirements. Each peak amplifier serves as a universal building block that can be independently switched on or off, allowing the system to achieve variable amplification capacity using identical modular components. This multi-functionality approach improves amplification efficiency across different signal levels while maintaining circuit structure simplicity through component standardization.
3Use of energy by moving object
If multiple peak amplifiers are used to improve power efficiency, then power consumption is reduced, but device complexity increases
Solution Approach 1:
The patent segments the amplifier system into a main amplifier and multiple independent peak amplifiers, each capable of being controlled separately. This segmentation allows the system to activate only the necessary number of peak amplifiers based on signal amplitude, reducing power consumption. The complexity is managed by controlling each segment independently through simple threshold-based switching logic rather than complex coordinated control.
Solution Approach 2:
The system dynamically adjusts the number of active peak amplifiers based on signal amplitude thresholds, enabling power-efficient operation by activating amplifiers only when needed. The control unit implements dynamic switching that adds or removes peak amplifiers from active service based on real-time signal conditions, achieving power savings while managing complexity through automated threshold-based control rather than manual configuration.
4Use of energy by moving object
If dynamic adjustment of amplifier numbers is implemented, then power consumption is reduced and amplification efficiency is improved, but control complexity increases
Solution Approach 1:
The control unit automatically monitors signal amplitude and dynamically adjusts the number of active peak amplifiers based on predefined thresholds, enabling the system to self-regulate its power consumption. This self-service mechanism reduces power consumption and improves amplification efficiency without requiring external manual intervention or complex control algorithms, managing control complexity through automated threshold-based decision logic.
Solution Approach 2:
The control mechanism changes the operational parameter of the system by dynamically adjusting the number of active amplifiers based on signal amplitude. This parameter change approach simplifies control complexity by using straightforward amplitude-threshold comparisons rather than complex control algorithms, achieving power consumption reduction and amplification efficiency improvement through simple, automated parameter adjustment.
Data Source
AI summary
An amplifier has an N number of input networks connected to an input terminal to receive an input signal, a first amplifier to amplify one output signal from the N number of input networks, a (N−1) number of secondary amplifiers to amplify the remaining (N−1) number of output signals, except for the one output signal, from the N number of input networks, where the amplification order of the (N−1) number of secondary amplifiers is determined based on the power level of each output signal from the N number of input networks when the first amplifier is operational, an N number of output networks which are arranged, and a first bias network to supply a D.C. bias voltage to at least one of the N number of output networks. An electrical length of the first bias network is less than 90 degrees.