Dual-Resonator Oscillator Layout for Low Acceleration Sensitivity
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Solution Overview
Problem
Electronic oscillators used in non-stationary applications, such as automotive and aircraft environments, experience undesirable frequency changes due to acceleration sensitivity, which is not effectively mitigated by existing technologies.
Innovation Solution
The use of resonators arranged antiparallel, with acceleration sensitivity vectors mirrored across a plane perpendicular to the axis of rotation, and the design of electrical connections to allow for flexible orientation and coupling, reduces acceleration sensitivity by achieving a better anti-parallel alignment and increasing the usable range of angles, thereby minimizing frequency changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If resonators are arranged with vectors pointing in the same direction, then the acceleration sensitivity is reduced, but the alignment precision and usable angle range are limited
Solution Approach 1:
The patent inverts the conventional approach by arranging resonators in an antiparallel configuration with vectors pointing in opposite directions rather than the same direction. This inversion, combined with the specific angular relationship (mirrored across a plane perpendicular to the rotation axis), creates superior cancellation of acceleration sensitivity while providing a broader usable angle range and more tolerant manufacturing specifications.
2Object-affected harmful factors
If resonators are arranged antiparallel with mirrored vector directions, then the acceleration sensitivity is significantly reduced, but the device complexity increases
Solution Approach 1:
The patent employs asymmetric angular positioning of resonators relative to the rotation axis, where each resonator's vector direction is mirrored across a plane perpendicular to the axis rather than being perfectly antiparallel. This asymmetric arrangement achieves effective acceleration sensitivity reduction while maintaining practical manufacturing feasibility and avoiding excessive structural complexity.
3Productivity
If the usable range of angles is increased, then the yield of manufacture is improved, but the alignment accuracy may be compromised
Solution Approach 1:
The patent optimizes the angular parameters of resonator positioning to achieve a balanced configuration. By carefully selecting the specific angles and orientations that satisfy the mirrored vector relationship, the design expands the usable angle range to improve manufacturing yield while maintaining sufficient alignment accuracy through the geometric constraints of the antiparallel arrangement.
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 approach significantly reduces acceleration sensitivity, improving the accuracy of anti-parallel alignment and increasing the yield of manufacture, while maintaining the desired frequency stability in oscillators.
Implementation Method 1
two resonators, which are mechanically arranged antiparallel, e.g. by being rotated by 180° relative to one another about at least one axis, are produced in this way or from a larger quantity of resonators are/are selected such that the magnitudes of the acceleration sensitivity vectors are substantially equal, the direction of the vector of one of the two resonators is mirrored with respect to the direction of the other resonator on the plane perpendicular to said axis
Data Source
AI summary
The invention relates to an oscillator comprising two resonators, the direction of the vector of acceleration sensitivity of at least one first resonator of the at least two resonators, said direction being relative to the mounting surface of said first oscillator, corresponding substantially to the reflected direction that is reflected by a mirror plane of the vector of acceleration sensitivity of at least one second resonator of the at least two resonators, said direction being relative to the mounting surface of said second oscillator. The invention also relates to an oscillator comprising two resonators, the oscillator comprising a resistor which is effectively connected in parallel with one of the resonators and the resistance value of which is less than a hundred times that of the series resonator resistance of the combined resonator at the desired resonant frequency.