Dual-Mass Flexure Resonator for Stable Low-Power Timekeeping
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Solution Overview
Problem
Existing technologies for time, such as existing clock generators and oscillators require elaborate electronics and processing steps to achieve high-frequency stability in changing environments, leading to increased chip footprint and power consumption, especially in low-power applications like IoT devices.
Innovation Solution
A resonator design with at least two masses connected by flexures, allowing rotational oscillation and interlinked by further flexures to reduce non-linearity, enabling high stability and accuracy with a small form factor and low power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elaborate electronics and processing steps are used to achieve high-frequency stability, then frequency stability is improved, but chip footprint and power consumption increase
Solution Approach 1:
The patent replaces complex electronic stability circuits with a mechanically designed resonator system. The dual-mass configuration with interlinking flexures creates inherent mechanical stability that reduces dependence on electronic compensation circuits, thereby reducing chip footprint while maintaining frequency stability.
Solution Approach 2:
The patent changes the fundamental operating parameters by using two masses instead of one, and by introducing interlinking flexures that modify the oscillation characteristics. This parameter change enables the system to achieve high Q-factor and frequency stability through mechanical design rather than electronic control.
2Reliability
If elaborate electronics and processing steps are used to achieve high-frequency stability, then frequency stability is improved, but power consumption increases
Solution Approach 1:
The patent substitutes mechanical stability mechanisms for electronic stability circuits, which are major power consumers. The interlinking flexures and dual-mass design provide passive mechanical stability that requires minimal active electronic control, thereby significantly reducing power consumption while maintaining frequency stability.
Solution Approach 2:
The resonator system is designed to be self-regulating through its mechanical structure. The interlinking flexures automatically compensate for frequency drift and maintain stability without requiring continuous active electronic control, enabling the system to serve itself and reduce power consumption.
3Stability of the object's composition
If two masses are interlinked by further flexures to reduce non-linearity, then oscillation linearity is improved, but device complexity increases
Solution Approach 1:
The patent segments the resonator into two separate masses instead of using a single mass. This segmentation allows the system to achieve better oscillation linearity by distributing the mechanical function across multiple elements, with each mass and its connecting flexures contributing to the overall linear oscillation characteristic.
Solution Approach 2:
The patent combines two masses with interlinking flexures into a unified oscillating system. While this increases structural elements, the merging creates a synergistic effect where the coupled masses provide mutual stabilization and improved linearity that outweighs the added structural complexity.
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
The resonator achieves high inherent stability and accuracy, allowing a small chip footprint and low power consumption, even when compared to standard quartz and silicon oscillators, by using straightforward circuitry to control the resonator.
Implementation Method 1
at least two of the masses are each individually connected to the ground by one or more flexures to enable the masses to oscillate rotationally relative to the ground
Implementation Method 2
at least one actuator and/or sensor to exchange power and/or information between at least one of the masses and the ground or between the masses
Data Source
Figure 1~2B
Figure 3~4B
AI summary
The invention relates to an resonator a resonator (1) for generating an electrical signal, in particular for timekeeping in electronic devices, comprising at least two masses (2), a ground (3), and at least one actuator (5, 6) and/or sensor (7) to exchange power and/or information between at least one of the masses (2) and the ground (3) or between the masses (2), wherein at least two of the masses (2) are each individually connected to the ground (3) by one or more flexures (10) to enable the masses (2) to oscillate rotationally relative to the ground (3) and wherein at least two of the masses (2) are interlinked by one or more further flexures (11).