PLL Temperature Compensation for Multi-Channel Phase Synchronization
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Solution Overview
Problem
Current phase-locked loop circuits in 5G base stations face challenges in maintaining phase synchronization between channels due to temperature changes, leading to increased phase deviations and high power consumption from frequent phase detection and alignment processes.
Innovation Solution
A phase-locked loop circuit with a phase temperature compensation circuit, which includes phase delay units that cancel out temperature-induced phase shifts, ensuring minimal phase difference between channels and reducing the need for continuous phase detection and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phase detection and alignment control are performed frequently to reduce phase error between channels, then phase synchronization is improved, but power consumption and system resource usage increase significantly
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing phase compensation values in a lookup table during system initialization or calibration phase. The phase compensation value corresponding to the current temperature is directly queried and applied without real-time computation, eliminating the need for frequent phase detection and alignment operations while maintaining phase synchronization accuracy
Solution Approach 2:
The system achieves self-service by using the temperature sensor to automatically trigger the appropriate phase compensation value from the lookup table based on current temperature conditions. This self-adjusting mechanism compensates for temperature-induced phase drift without requiring external control interventions or frequent phase detection, thereby reducing power consumption while maintaining synchronization
2Reliability
If phase detection and alignment control are performed frequently to reduce phase error between channels, then phase synchronization is improved, but system resource usage increases significantly
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing phase compensation values in a lookup table during system initialization or calibration phase. The phase compensation value corresponding to the current temperature is directly queried and applied without real-time computation, eliminating the need for frequent phase detection and alignment operations while maintaining phase synchronization accuracy
Solution Approach 2:
The system achieves self-service by using the temperature sensor to automatically trigger the appropriate phase compensation value from the lookup table based on current temperature conditions. This self-adjusting mechanism compensates for temperature-induced phase drift without requiring external control interventions or frequent phase detection, thereby reducing power consumption while maintaining synchronization
3Device complexity
If one phase-locked loop circuit is used per channel to reduce cost and board area, then device complexity is reduced, but phase synchronization between channels deteriorates due to temperature-induced phase shifts
Solution Approach 1:
The patent applies parameter changes by introducing temperature as a compensating parameter. The phase compensation value is determined based on temperature measurements and stored in a lookup table. By changing the operating parameter (temperature) to trigger appropriate compensation, the system maintains phase synchronization across channels while using cost-effective single PLL configurations
Solution Approach 2:
The patent introduces temperature compensation values as an intermediary element between the phase-locked loop circuits and the temperature-induced phase drift. These compensation values, stored in a lookup table, act as mediators that offset the temperature effects on channel phases, enabling synchronization without requiring complex multi-PLL configurations
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 solution maintains phase synchronization across multiple channels with reduced power consumption and resource utilization by minimizing temperature-induced phase shifts, thereby improving communication efficiency.
Implementation Method 1
the phase shift generated by the phase delay unit connected to the phase-locked loop main circuit as a result of a temperature change and a phase shift generated by the phase-locked loop main circuit as a result of a temperature change cancel each other out
Data Source
AI summary
Provided is a phase-locked loop circuit, a method for configuring the same, and a communication device. The phase-locked loop circuit includes a phase-locked loop main circuit and a phase temperature compensation circuit. The phase temperature compensation circuit includes at least one phase delay unit connected to the phase-locked loop main circuit and configured to generate a phase shift as a result of a temperature change for cancelling out a phase shift generated by the phase-locked loop main circuit as a result of a temperature change.