Nested Crystal Oscillator Layout for Accurate Temperature Compensation
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Solution Overview
Problem
Existing oscillators face challenges in accurately correcting output signal frequency due to temperature differences between the temperature sensor and the resonator element, leading to reduced frequency accuracy.
Innovation Solution
The oscillator design integrates a temperature sensor with the resonator element within the same internal space, using a temperature compensated crystal oscillator with a frequency control circuit to accurately detect and compensate for temperature variations, reducing heat exchange and thermal differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the temperature sensor is located outside the inner package that accommodates the resonator element, then the device complexity is reduced, but the temperature difference between the temperature sensor and the resonator element increases, reducing frequency accuracy
Solution Approach 1:
The patent merges the temperature sensor and resonator element into the same inner package, allowing them to share the same thermal environment. This ensures accurate temperature measurement for frequency compensation while maintaining a compact structure, resolving the contradiction between device simplicity and measurement accuracy.
Solution Approach 2:
The patent introduces a temperature compensation circuit as an intermediary that receives temperature data from the sensor and adjusts the output signal frequency accordingly. This mediator enables accurate frequency control by bridging the temperature measurement and signal output, ensuring high frequency accuracy without excessive complexity.
2Measurement precision
If the temperature sensor is integrated with the resonator element in the same internal space, then the temperature detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent implements a nested structure where the temperature sensor is integrated within the same inner package as the resonator element. This nesting allows both components to occupy the same thermal zone for accurate temperature detection, while the packaged structure keeps the overall device complexity manageable through modular design.
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 accuracy of temperature detection and frequency compensation, resulting in a highly accurate frequency signal output with reduced thermal differences between the resonator and sensor.
Implementation Method 1
a temperature sensor that is disposed on the other main surface side of the second base substrate
Implementation Method 2
an oscillation circuit oscillating the resonator element and generating an oscillation signal
Data Source
AI summary
An oscillator includes a first container that includes a first base substrate and a first lid and that has a first internal space, a second container that is fixed to the first base substrate in the first internal space and that includes a second base substrate and a second lid and that has a second internal space, a resonator element that is disposed on the lower surface side of the second base substrate in the second internal space, a temperature sensor that is disposed on the upper surface side of the second base substrate, a first circuit element that includes an oscillation circuit and a second circuit element that is fixed to the first base substrate in the first internal space and that includes a frequency control circuit that controls a frequency of the oscillation signal output by the oscillation circuit. The second container and the second circuit element are arranged side by side in plan view.