Single Port Interface for Simulating Bidirectional Photonic Signals
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Solution Overview
Problem
Existing Verilog-A implementations for simulating photonic components require two different port types to represent forward and backward propagating signals, leading to artificial constraints and complexity in circuit simulations.
Innovation Solution
The proposed solutions involve either creating bidirectional signals on a single bus line using potential and flow representations or auto-configuring port types at runtime to eliminate the need for distinct port types, thereby simplifying the simulation process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two different port types are used to represent forward and backward propagating signals, then signal directionality is preserved, but device complexity and connection constraints increase
Solution Approach 1:
The patent merges the distinction between forward and backward propagating signals into a single bidirectional port interface. Instead of requiring separate port types for different signal directions, the invention allows a single port to handle both directions of signal flow, eliminating the need for multiple port type definitions and reducing connection constraints while maintaining signal directionality through software-level differentiation.
Solution Approach 2:
The patent implements universal port interfaces that can function in multiple roles - serving as both input and output ports regardless of signal direction. This multi-functional approach allows the same port type to be used for both forward and backward propagating signals, making the interface adaptable to different connection configurations without requiring specialized port types.
2Reliability
If two different port types are required for forward and backward signals, then signal flow control is maintained, but ease of operation deteriorates
Solution Approach 1:
By combining the functionality of multiple port types into a single bidirectional port interface, the patent eliminates the need for users to distinguish between different port types when making connections. This merging approach maintains signal flow control through software-level signal direction identification while greatly simplifying the user operation of connecting ports.
Solution Approach 2:
Instead of requiring the user to manage port type matching, the invention inverts the approach by having the system automatically manage signal directionality. The port interface appears identical to the user regardless of signal direction, and the system handles the differentiation internally, reversing the traditional model where users must explicitly match port types.
3Measurement precision
If multiple analog signal lines are used to represent forward and backward propagating signals, then signal representation accuracy is maintained, but device complexity increases
Solution Approach 1:
The patent merges multiple signal line representations into a single bidirectional signal line. Instead of requiring separate analog signal lines for forward and backward propagating signals, the invention combines these into one line that can carry signals in both directions, maintaining the necessary signal representation accuracy while reducing the overall number of bus lines required.
Data Source
AI summary
A system and method are provided for simulating circuits that transmit bidirectional signals between some ports using simulators designed originally for electrical circuits and systems, that eliminate the need for different port interfaces. The system and method can be applied to simulate photonic circuits either standalone or integrated with electrical circuits and systems. In one method implemented by the system potential and flow representations, available for example in Verilog-A simulators, are used to create bidirectional signals on a single bus line to transmit optical signals. In another method implemented by the system, the system auto-configures each optical port type as left or right at runtime or during a pre-simulation initialization to allow for bidirectional signals with a single port interface.