Offset Capacitive Voltage Control for Envelope Tracking Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communications devices require RF circuitry that is low cost, small, simple, and efficient to support multiple wireless protocols with varying performance requirements, while minimizing size, cost, and power consumption, especially in portable devices.
Innovation Solution
A parallel amplifier with an offset capacitance voltage control loop is coupled to an envelope tracking power supply, allowing for adjustable offset capacitive voltage on a communications slot-to-communications slot basis to optimize efficiency during envelope tracking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If envelope tracking is used to improve power supply efficiency, then power consumption is reduced, but efficiency optimization is limited by fixed offset capacitive voltage
Solution Approach 1:
The offset capacitive voltage is made dynamically adjustable through a control loop that modifies the voltage based on communications slot information. This allows the power supply to adapt its efficiency optimization strategy in real-time根据不同通信协议的要求，resolving the contradiction between reducing power consumption and maintaining efficiency optimization flexibility.
Solution Approach 2:
The invention changes the parameter of offset capacitive voltage from fixed to variable by implementing a control loop that adjusts the voltage level. This parameter change enables the system to optimize efficiency for different wireless communication protocols while maintaining low power consumption, addressing both aspects of the contradiction.
2Device complexity
If fixed offset capacitive voltage is used, then circuit design is simplified, but efficiency cannot be optimized for different communication protocols
Solution Approach 1:
The control loop dynamically adjusts the offset capacitive voltage based on detected communication protocol requirements. This dynamic approach maintains relatively simple circuit design while achieving high adaptability to different protocols, resolving the contradiction between circuit simplicity and protocol versatility.
Solution Approach 2:
The invention implements a feedback mechanism where the control loop monitors communication slot information and adjusts the offset capacitive voltage accordingly. This feedback system enables protocol adaptability without significantly increasing circuit complexity, as the adjustment logic can be implemented through straightforward control algorithms.
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
This configuration enhances the efficiency of the envelope tracking power supply by adjusting the offset capacitive voltage, enabling the RF power amplifier to efficiently track the envelope of the RF transmit signal, thereby improving power supply efficiency and compliance with communications standards.
Implementation Method 1
The offset capacitive element has an offset capacitive voltage
Data Source
AI summary
A parallel amplifier and an offset capacitance voltage control loop are disclosed. The parallel amplifier has a parallel amplifier output, which is coupled to an envelope tracking power supply output via an offset capacitive element. The offset capacitive element has an offset capacitive voltage. The offset capacitance voltage control loop regulates the offset capacitive voltage, which is adjustable on a communications slot-to-communications slot basis.