AC-Coupled Envelope Tracking Supply for Amplifier Efficiency
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Solution Overview
Problem
Amplifiers face inefficiencies due to mismatched power supply levels and input signal characteristics, leading to reduced output performance.
Innovation Solution
A system comprising a device with multiple circuits that monitor and compare input and output signals to adjust power supply voltage levels, using comparators and tracking mode selectors to control the power sources, ensuring efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed power supply voltage is used for the amplifier, then the circuit design is simplified, but the amplifier efficiency decreases when the power supply level does not match the input signal characteristics
Solution Approach 1:
The patent implements dynamic power supply voltage adjustment by introducing a controller that modifies the power supply voltage based on the characteristics of the input signal. The controller receives the input signal, analyzes its characteristics (such as amplitude, frequency, or envelope), and dynamically adjusts the power supply voltage to match these characteristics, thereby optimizing amplifier efficiency while maintaining manageable circuit complexity through systematic control architecture.
Solution Approach 2:
The patent employs feedback mechanisms where the controller continuously monitors the input signal characteristics and adjusts the power supply voltage accordingly. This closed-loop control system ensures that the power supply voltage adapts to varying signal conditions, improving amplifier efficiency without requiring overly complex circuit design, as the feedback loop systematically manages the adaptation process.
2Use of energy by moving object
If the power supply voltage is dynamically adjusted to match input signal characteristics, then amplifier efficiency is improved, but the device complexity increases due to additional monitoring and control circuits
Solution Approach 1:
The patent applies multi-functionality by designing the controller to perform multiple tasks: monitoring input signal characteristics, determining optimal power supply voltage levels, and controlling the power supply adjustment. This consolidation of functions into a single control unit improves amplifier efficiency while minimizing the increase in overall device complexity, as one component handles multiple responsibilities rather than requiring separate dedicated circuits for each function.
Solution Approach 2:
The patent implements parameter changes by systematically varying the power supply voltage based on quantifiable signal characteristics. The controller measures specific parameters of the input signal (such as envelope amplitude or frequency) and adjusts the power supply voltage as a corresponding parameter, creating a predictable and manageable relationship between signal characteristics and power supply levels that avoids excessive circuit complexity.
3Productivity
If multiple power supply levels are used to match different signal conditions, then output performance is optimized, but the loss of time for switching between power levels increases
Solution Approach 1:
The patent applies preliminary action by having the controller continuously monitor and predict optimal power supply voltage levels based on upcoming signal characteristics. The controller prepares the power supply voltage in advance of signal transitions, reducing the switching time and minimizing the loss of time between different power levels. This proactive adjustment maintains optimized output performance while reducing temporal delays associated with power supply switching.
Solution Approach 2:
The patent implements periodic action by adjusting the power supply voltage at regular intervals or in response to periodic signal patterns. The controller uses periodic sampling of the input signal to determine when power supply adjustments are necessary, optimizing output performance for periodic or predictable signal conditions while minimizing unnecessary switching operations that would increase time loss.
Data Source
AI summary
A device including a first circuit, a second circuit, and a third circuit. The first circuit to receive a first signal and a second signal, and the first circuit to provide a third signal. The second circuit to receive a fourth signal and a fifth signal, and the second circuit to provide a sixth signal. The third circuit to receive the third signal and the sixth signal, and the third circuit to provide a seventh signal to indicate whether to track a difference between an amount of voltage provide to a driver and an amount of voltage provided by the driver or track a difference between an amount of voltage provided by a source and the amount of voltage provided to the driver.