Interface Circuit Layout for Optional Electrical Isolation
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Solution Overview
Problem
The existing techniques require different wiring patterns for substrates based on whether an isolation device is mounted, which complicates production and increases costs, as they cannot communalize substrates for both isolated and non-isolated power supply circuits.
Innovation Solution
An interface circuit design that includes a connector, an electronic circuit, a region for mounting an isolation device, and separate wiring lines to connect the circuit and connector, allowing for a common wiring pattern regardless of the power supply circuit type, eliminating the need for different substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different wiring patterns are prepared for substrates depending on whether an isolation device is mounted, then the substrate can be properly configured for isolated or non-isolated power supply circuits, but the production efficiency decreases and manufacturing complexity increases
Solution Approach 1:
The substrate is designed with a universal wiring pattern that can accommodate both isolated and non-isolated power supply circuits through optional isolation device mounting. The wiring pattern includes predetermined connection portions that can be selectively connected or disconnected based on the power supply type, allowing one substrate design to serve multiple configurations without requiring different wiring patterns for different applications.
2Reliability
If different wiring patterns are prepared for substrates depending on whether an isolation device is mounted, then the electrical isolation requirement can be met, but the device complexity and manufacturing cost increase
Solution Approach 1:
The substrate wiring is segmented into distinct connection portions: a first connection portion for connecting to the power supply circuit and a second connection portion for connecting to the interface circuit. The isolation device is positioned to selectively isolate these segmented portions. This segmentation allows the same substrate to provide electrical isolation when needed while maintaining a unified wiring pattern, reducing manufacturing complexity compared to designing entirely different wiring patterns for different configurations.
3Adaptability or versatility
If multiple substrate types with different wiring patterns are maintained, then the interface circuit can be properly configured for different power supply types, but the inventory management and production costs increase
Solution Approach 1:
The substrate incorporates dynamic configuration capability through selective connection of wiring portions. Jumpers or switches are provided to dynamically change the connection state between the first and second connection portions based on the power supply circuit type. This dynamic configurability allows a single substrate design to adapt to different power supply configurations (isolated or non-isolated) without requiring separate static wiring patterns, thereby simplifying manufacturing and inventory management while maintaining full compatibility.
Data Source
AI summary
An interface circuit includes: a connector connectable to a PC; a communication circuit capable of generating a transmission signal to another electronic device; a first region that is set between the connector and the communication circuit to allow an electrical isolation device to be mounted therein; wiring lines used to connect the communication circuit and the connector to each other through the first region; and wiring lines used to connect the electronic circuit and the connector to each other through a region other than the first region.