Temperature-Based PA Bias Control for Low-Current Transmission
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Solution Overview
Problem
Communication systems face challenges in balancing transmission performance and current consumption, particularly in low temperature environments where power amplifier (PA) bias adjustments are needed to maintain performance while reducing power consumption.
Innovation Solution
An electronic device equipped with a temperature sensor and controller that dynamically adjusts the PA bias based on temperature and operation conditions to optimize transmission power and reduce current consumption, using a bias table and temperature-based compensation tables to select appropriate PA bias values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a high bias is applied to the PA to improve transmission performance, then transmission performance is improved, but current consumption increases
Solution Approach 1:
The patent applies dynamics by making the PA bias value adjustable and adaptable rather than fixed. The controller dynamically selects bias values from a bias table based on temperature conditions and operation states, allowing the system to optimize between transmission performance and current consumption in real-time according to environmental and operational conditions.
Solution Approach 2:
The patent changes the parameter of bias value based on temperature and operation state. By storing multiple bias values in a bias table corresponding to different temperature ranges and operation states, the system adjusts the PA's operating parameters to achieve optimal performance while minimizing current consumption under varying conditions.
2Reliability
If the PA bias is adjusted to maintain transmission performance in low temperature environments, then transmission performance is maintained, but system complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-storing multiple bias values in a bias table corresponding to different temperature ranges and operation states. This allows the controller to quickly select appropriate bias values without complex real-time calculations, maintaining transmission performance while avoiding the need for complex dynamic adjustment mechanisms.
Solution Approach 2:
The patent replaces complex mechanical or analog bias adjustment mechanisms with a digital control system that selects from pre-stored bias values. This substitution simplifies the physical system while maintaining the ability to adapt to different temperature and operation conditions through software-based control.
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 ensures consistent transmission power across varying temperatures, preventing power loss and reducing current consumption during calls, thereby enhancing the efficiency of communication devices.
Implementation Method 1
determining a temperature surrounding a power amplifier (PA)
Data Source
AI summary
A transmission power control method and an electronic device capable of adjusting a bias of a power amplifier are provided. The electronic device includes: a temperature sensor; a power amplifier (PA); and a controller configured to monitor signals from the temperature sensor, determine a bias value for the PA, based on the monitored signals, and control the PA to amplify a signal for transmission based on the determined bias value.