Switch-Based Variable Circuit for Compact Inductance Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing variable inductance circuits face challenges in minimizing size while maintaining functionality, particularly in applications requiring multiple band transmission/reception states.
Innovation Solution
A variable circuit design featuring a switch with multiple input and output terminals, along with external wiring lines that allow for internal connection paths to be formed, enabling the circuit to adapt to different inductance states without increasing size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple series-connected inductors with parallel switches are used to achieve variable inductance, then inductance adjustment capability is improved, but circuit size increases
Solution Approach 1:
Multiple inductors that were previously separate components are merged into a single planar inductor structure formed by wiring patterns on a substrate. The wiring patterns create multiple inductance paths within one integrated component, eliminating the need for multiple discrete inductors and reducing overall circuit size while maintaining variable inductance functionality.
Solution Approach 2:
The inductor structure transitions from a three-dimensional stacked configuration to a two-dimensional planar arrangement on the substrate. By utilizing wiring patterns that extend across the substrate surface, the design achieves multiple inductance values within a compact planar footprint, effectively reducing the area occupied by the inductor components.
2Adaptability or versatility
If discrete inductors and switches are used for variable inductance, then inductance switching functionality is improved, but integration density decreases
Solution Approach 1:
The switch and inductor components are merged into a single integrated structure where the wiring patterns serve dual purposes as both inductive elements and switch control paths. This integration eliminates the need for separate discrete components and reduces the overall device complexity while maintaining full inductance switching functionality.
Solution Approach 2:
The wiring patterns in the integrated structure serve multiple functions simultaneously: they provide inductance paths, serve as current conduits, and enable switching operations through their configuration. This multi-functionality reduces the number of dedicated components needed, thereby improving integration density without sacrificing functionality.
Data Source
AI summary
A variable circuit includes a switch including a plurality of input terminals and a plurality of output terminals and an external wiring line. The multiple input terminals include a first input terminal to which a first input signal is inputted and a second input terminal to which a second input signal is inputted. The multiple output terminals include a first output terminal from which a first output signal is outputted and a second output terminal from which a second output signal is outputted. The switch is capable of forming at least one internal connection path electrically connecting any one of the multiple input terminals and any one of the multiple output terminals. The external wiring line is disposed outside the switch and is configured to electrically connect the second output terminal to the second input terminal.