Amplifier Distortion Modeling with Dynamic Internal-State Blending
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Solution Overview
Problem
Existing amplifier models struggle to accurately simulate distortion characteristics due to varying internal states, such as the Idq drift phenomenon in compound semiconductor amplifiers, which complicates distortion compensation and peripheral circuit design.
Innovation Solution
A modeling device and method that utilize a combination of multiple calculation models representing different internal states of an amplifier, with a combiner adjusting the combination ratio based on the varying internal state, allowing for dynamic simulation of distortion characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single amplifier model is used to simulate distortion characteristics, then the model structure remains simple, but the simulation accuracy deteriorates due to varying internal states such as Idq drift
Solution Approach 1:
The patent divides a single amplifier model into multiple calculation models, each representing a specific internal state (e.g., different Idq drift conditions). This segmentation allows accurate simulation of distortion characteristics under varying internal states while maintaining manageable complexity through modular structure.
Solution Approach 2:
The patent introduces a combiner that dynamically adjusts the combination ratio between multiple calculation models based on the actual internal state of the amplifier. This dynamic adaptation enables the model to accurately track distortion characteristics as internal conditions change, resolving the contradiction between accuracy and complexity.
2Measurement precision
If multiple calculation models are combined to represent different internal states, then the simulation accuracy improves, but the device complexity increases
Solution Approach 1:
The combiner serves as a universal component that can adaptively combine multiple calculation models based on varying internal states. This multi-functional approach allows a single model structure to handle multiple operating conditions, improving accuracy without proportionally increasing overall system complexity.
Solution Approach 2:
The patent changes the combination ratio parameter dynamically based on internal state measurements (such as Idq drift level). By adjusting this parameter, the model accurately represents different operational conditions, achieving high simulation accuracy while maintaining a structured, manageable model framework.
3Reliability
If the internal state variations are not considered, then the model remains simple, but the distortion compensation performance evaluation becomes inaccurate
Solution Approach 1:
The patent incorporates feedback mechanisms where the combiner monitors internal state variations and adjusts the combination ratio accordingly. This feedback loop ensures that the model accurately reflects actual amplifier behavior under varying conditions, providing reliable distortion compensation performance evaluation while maintaining a systematic approach to managing model complexity.
Data Source
AI summary
Provided is a modeling device performing calculation using an amplifier model that models an amplifier of which an internal state affecting a distortion characteristic varies, wherein the amplifier model includes a plurality of calculation models that model the amplifier in different internal states, and a combiner that combines the plurality of calculation models at a combination ratio corresponding to the internal state that varies.