RF Power Amplifier Circuit Layout for Stable APT and ET Supply
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Solution Overview
Problem
The power supply voltage in power amplifier systems supporting both average power tracking and envelope tracking systems is unstable, particularly in average power tracking systems.
Innovation Solution
A radio-frequency circuit design that includes a power amplifier, a control circuit, an on-off switch, and a mount board, where the control circuit controls the power amplifier using both tracking systems, and an on-off switch is connected in series with a capacitive element between the ground and the power supply path, with a connection terminal to stabilize the power supply voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both average power tracking system and envelope tracking system are supported, then the power amplifier can operate in multiple modes, but the power supply voltage becomes unstable in the average power tracking system
Solution Approach 1:
The patent segments the power supply path by introducing a separate capacitor connection terminal and dedicated capacitance, isolating the average power tracking system's power supply from the envelope tracking system's power supply. This segmentation prevents the capacitance changes in envelope tracking from affecting the average power tracking power supply stability.
Solution Approach 2:
The patent introduces a capacitor connection terminal as an intermediary element between the power supply terminal and ground. This terminal provides a dedicated path for power supply stabilization capacitance, acting as a mediator that decouples the two tracking systems' power supply interactions and stabilizes the voltage for average power tracking.
2Reliability
If a capacitor is connected between ground and the power supply path for stabilization, then power supply voltage stability improves, but the circuit complexity increases
Solution Approach 1:
The capacitor connection terminal serves multiple functions: it stabilizes the power supply voltage for average power tracking, provides a reference point for envelope tracking capacitance management, and enables independent control of power supply characteristics. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The patent combines the power supply stabilization function with the existing dual tracking system architecture by integrating the capacitor connection terminal into the power supply network. This merging approach adds stabilization capability without creating entirely separate circuits, thereby limiting the increase in complexity.
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 design stabilizes the power supply voltage to the power amplifier, enhancing efficiency in both tracking systems.
Implementation Method 1
an on-off switch connected in series to a capacitive element connected between a ground and a path between the control circuit and the power supply terminal
Data Source
AI summary
A radio-frequency circuit is provided that includes a power amplifier, a control circuit, an on-off switch, a connection terminal, and a mount board. The power amplifier supports an APT system and an ET system. The control circuit controls the power amplifier by using the APT system and the ET system. The on-off switch is connected in series to a capacitive element connected between a path and the ground. The connection terminal is connected to the capacitive element. Moreover, the control circuit overlies the connection terminal in plan view in the thickness direction of the mount board.