Oscillation Module Coil Layout for Magnetic Coupling Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing oscillation circuits face degradation of oscillation signals due to magnetic field coupling between coils in the oscillation circuit and filter circuit, leading to reduced signal quality and accuracy.
Innovation Solution
The oscillation module incorporates a design where the first and second coils are arranged with their magnetic fields opposing each other, and a third coil is positioned equidistant from their centers, with a variable capacitance element and differential amplifier strategically placed to minimize magnetic field coupling and layout area, while maintaining high frequency accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the third coil is placed close to the first and second coils to reduce layout area, then the area of the integrated circuit is reduced, but magnetic field coupling between the coils increases causing signal degradation
Solution Approach 1:
The third coil is arranged asymmetrically so that its longitudinal axis intersects a virtual straight line equidistant from the centers of the first and second coils at a position offset from the center, creating an asymmetric layout that reduces magnetic field coupling while maintaining compact area
Solution Approach 2:
The solution addresses the magnetic field coupling problem by changing the spatial orientation and positional relationship between coils in the planar layout, using dimensional arrangement optimization to reduce coupling effects while maintaining area efficiency
2Object-affected harmful factors
If the first and second coils are arranged with opposing magnetic fields to reduce coupling, then magnetic field coupling is reduced, but the layout complexity increases
Solution Approach 1:
The first and second coils are designed with specific local orientations and configurations that generate opposing magnetic fields in the region where the third coil is positioned, creating localized magnetic field cancellation without requiring complex overall layout changes
Solution Approach 2:
The opposing magnetic fields generated by the first and second coils, which could be considered a complex design feature, are converted into a beneficial effect by positioning the third coil to intersect the equidistant virtual straight line, where the magnetic fields from the first and second coils cancel each other out, reducing coupling to the third coil
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 effectively reduces signal degradation caused by magnetic field coupling, enhancing the frequency accuracy and signal-to-noise ratio of the oscillation signal, thereby improving the reliability of electronic devices and moving objects.
Implementation Method 1
a direction of a magnetic field generated by the first coil and a direction of a magnetic field generated by the second coil are opposite to each other and are weakened
Data Source
AI summary
An integrated circuit includes first and second coils, a first pad connected to the first coil and to a resonator, a second pad connected to the second coil and to the resonator, and first and second output terminals. The first pad is arranged to provide signals between the resonator and the first coil. The second pad is arranged to provide signals between the resonator and the second coil. A distance between the first pad and the first coil is less than a distance between the first coil and the first output terminal and a distance between the first coil and the second output terminal. A distance between the second pad and the second coil is less than a distance between the second coil and the first output terminal and a distance between the second coil and the second output terminal.