Power Amplifier Supply Apparatus with Inductive Detection
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Solution Overview
Problem
Power amplifiers in wireless communications face efficiency reduction due to the need for reduced maximum power settings to ensure linearity, and existing solutions like envelope tracking are complex and limited in handling wide bandwidth signals.
Innovation Solution
A power supply apparatus with a converter, detector, and controller that converts input power into driving power, detects power information using an inductor, and controls power conversion based on envelope signals and detected signals, incorporating multi-level converters and comparators to enhance efficiency and bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If power amplifiers are designed to operate at maximum power point, then power output is maximized, but linearity is compromised and efficiency decreases
Solution Approach 1:
The patent implements dynamic supply voltage adjustment through a converter that modulates the power supply voltage according to the envelope of the input signal. This allows the power amplifier to operate at maximum power point dynamically while maintaining linearity through adaptive voltage control, resolving the contradiction between power output and linearity
Solution Approach 2:
The detector monitors the output signal and feeds back information to the controller, which adjusts the converter operation accordingly. This feedback mechanism ensures that the power amplifier operates within linear regions while maintaining maximum power output, addressing the linearity constraint
2Loss of energy
If envelope tracking method is used to improve efficiency, then power efficiency is improved, but circuit complexity increases and bandwidth handling is limited
Solution Approach 1:
The converter is designed to perform multiple functions: voltage conversion, envelope tracking, and wide bandwidth signal handling. By integrating these functions into a single multi-level converter architecture, the patent achieves improved efficiency without proportionally increasing circuit complexity
Solution Approach 2:
The patent changes the operating parameters of the converter dynamically, adjusting switching frequencies and voltage levels based on the input signal characteristics. This allows the system to maintain high efficiency across wide bandwidth signals while managing circuit complexity through adaptive parameter control
3Reliability
If power amplifiers operate at lower power settings to ensure linearity, then linearity is maintained, but overall system efficiency decreases
Solution Approach 1:
The system dynamically adjusts the supply voltage to match the instantaneous power requirements of the amplifier. This allows the amplifier to operate at higher power levels when needed while maintaining linearity through adaptive voltage control, thereby improving overall system efficiency without sacrificing linearity
Solution Approach 2:
The converter pre-adjusts the supply voltage based on the envelope information of the input signal before the power amplifier processes the signal. This preliminary voltage adjustment ensures that the amplifier operates in its optimal linear region while maximizing power efficiency
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution increases signal bandwidth and efficiency by adaptively regulating power conversion, reducing ripple voltage, and maintaining high effective switching frequencies, thus addressing the limitations of existing power amplifier designs.
Implementation Method 1
an inductor formed on a detection path of the driving power, and configured to detect power information of the driving power to generate a detected signal
Implementation Method 2
a converter configured to convert input power into driving power
Data Source
AI summary
A power supply apparatus for a power amplifier includes a converter configured to convert input power into driving power for the power amplifier, a detector configured to transfer the driving power from the converter to the power amplifier, including an inductor formed on a detection path of the driving power, and configured to detect power information regarding the driving power to generate a detected signal, and a controller configured to control power conversion of the converter based on an envelope signal of a signal input to the power amplifier and the detected signal.