Dual-Frequency Oscillator Layout for Stable High-Frequency Output
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Solution Overview
Problem
The challenge is to create a compact oscillator with stable output frequencies, particularly when two quartz crystal oscillation units are placed on a single substrate, which limits design freedom and results in unstable higher-frequency outputs.
Innovation Solution
The oscillator design includes a support substrate with integrated first and second frequency generating components, where the second frequency generating component, producing a higher output frequency, is positioned closer to the ground terminal, stabilizing both output frequencies. This configuration can involve oscillator circuits with multiplier circuits and transducers, ensuring the second output frequency is reliably stable, especially when it exceeds 800 MHz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If two quartz crystal oscillation units are placed on a single substrate to reduce oscillator size, then the oscillator becomes compact, but the output frequency stability deteriorates
Solution Approach 1:
The patent applies local quality by positioning the second frequency generating component (higher frequency) closer to the ground terminal than the first frequency generating component. This creates a non-uniform spatial distribution where components at different locations have different ground reference characteristics, optimizing frequency stability for each component based on its specific frequency requirements.
Solution Approach 2:
The patent resolves the spatial conflict by utilizing the vertical dimension (distance from ground terminal) rather than only horizontal placement on the substrate. By arranging components at different distances from the ground terminal along the vertical axis, the patent maintains both compactness and frequency stability without increasing substrate area.
2Reliability
If the second frequency generating component is positioned closer to the ground terminal, then the second output frequency stability improves, but the design freedom is reduced
Solution Approach 1:
The patent changes the spatial parameter (distance from ground terminal) as a design variable to optimize frequency stability. By establishing a specific parameter relationship where the second component is positioned closer to the ground terminal, the patent achieves improved stability while maintaining design flexibility through systematic parameter optimization rather than arbitrary placement constraints.
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 arrangement achieves a compact and highly reliable oscillator with stable output frequencies, suitable for electronic apparatuses and moving objects, by positioning the higher-frequency component closer to the ground terminal, thereby stabilizing both frequencies and enhancing reliability.
Implementation Method 1
the second frequency generating component generating a second output frequency that is higher than the first output frequency
Data Source
AI summary
An oscillator comprising a support substrate, at least one transducer mounted on a first surface of the support substrate, and an integrated circuit element mounted on a second surface of the support substrate. The integrated circuit element includes first and second frequency generating components integrated therein. The first frequency generating component generates a first output frequency, and the second frequency generating component generates a second output frequency that is higher than the first output frequency. The oscillator also includes a ground terminal to which the second frequency generating component is closer than the first frequency generating component.