Resonator Temperature Compensation Using Multi-Sensor Thermal Estimation
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Solution Overview
Problem
Existing oscillators, such as TCXO, face accuracy issues in temperature compensation due to delays in heat conduction between temperature sensors and resonators, leading to inaccurate temperature measurement and compensation.
Innovation Solution
An integrated circuit device with multiple temperature sensors and a digital signal processing circuit that performs A/D conversion and neural network calculations to correct temperature characteristics, improving heat conduction path positioning and using heat circuit simulation for accurate temperature estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is disposed in an integrated circuit device to perform temperature compensation, then temperature compensation can be executed, but heat conduction delay occurs between the temperature sensor and the resonator, causing inaccurate temperature measurement
Solution Approach 1:
The patent divides the temperature measurement function into multiple temperature sensors positioned at different locations within the integrated circuit device. By segmenting the sensing function and distributing sensors strategically, the system captures temperature variations from different thermal zones, enabling more accurate estimation of the resonator temperature despite heat conduction delays at any single location.
Solution Approach 2:
The patent introduces a heat conduction model as an intermediary computational layer between the temperature sensors and the compensation process. This model simulates heat transfer dynamics to estimate the resonator temperature based on sensor readings, effectively bridging the gap caused by heat conduction delay and providing accurate temperature compensation.
2Measurement precision
If multiple temperature sensors are used to reduce measurement error, then temperature compensation accuracy improves, but device complexity increases
Solution Approach 1:
The patent places temperature sensors at specific strategic locations within the integrated circuit device where they can most effectively capture relevant thermal information. Rather than uniformly distributing sensors throughout the device, the placement is optimized to monitor critical thermal zones near heat-generating components and heat conduction paths, achieving high measurement precision with a minimal number of sensors.
Solution Approach 2:
The heat conduction model serves as a computational intermediary that processes readings from multiple sensors to derive accurate resonator temperature estimates. This model reduces the burden on the physical sensor network by performing virtual thermal measurements through simulation, allowing the system to achieve high accuracy without proportionally increasing hardware complexity.
3Measurement precision
If temperature sensors are positioned closer to the resonator to reduce heat conduction delay, then temperature measurement accuracy improves, but the sensors may be affected by other thermal interference from power supply and output terminals
Solution Approach 1:
The patent segments the thermal monitoring function by deploying multiple temperature sensors at different strategic locations within the integrated circuit device. This segmentation allows the system to capture temperature information from multiple thermal zones simultaneously, including areas near the resonator while also monitoring thermal conditions near power supply and output terminals, thereby isolating and compensating for thermal interference effects.
Solution Approach 2:
The patent implements a feedback mechanism where temperature readings from multiple sensors are continuously fed into a heat conduction model that simulates thermal interactions between different components. The model accounts for thermal interference from power supply and output terminals by incorporating their thermal effects into the simulation, allowing the system to feedback-correct the resonator temperature estimate and maintain high measurement accuracy despite thermal interference.
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
Enhances the accuracy of temperature compensation processes by reducing temperature differences between sensors and resonators, ensuring high-frequency stability even during holdover periods in communication systems.
Implementation Method 1
a delay in heat conduction that corresponds to heat conduction between the resonator and the temperature sensor occurs depending on the structure of the oscillator
Data Source
AI summary
An integrated circuit device includes first and second temperature sensors, an A/D conversion circuit that performs A/D conversion on first and second temperature detection voltages from the first and second temperature sensors and outputs first and second temperature detection data, a connection terminal that is electrically connected to a temperature detection target device of the first and second temperature sensors, and a digital signal processing circuit that performs digital calculation based on the first and second temperature detection data and performs a temperature compensation process of correcting temperature characteristics of the temperature detection target device.