LIN Bus Driver Circuit With Selectable V1.3 and V2.0 Output
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current LIN bus driver circuits require version-specific implementation for either LIN bus specification V1.3 or V2.0, necessitating separate manufacturing processes for each standard, which is inefficient and limits flexibility.
Innovation Solution
An integrated driver circuit with a specification selection mechanism that allows switching between different LIN bus specifications by using a flip-flop-based specification selection circuit and pull-up resistors to generate output data signals according to either V1.3 or V2.0, with the option to select the active specification during the packaging process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If version-specific driver circuits are implemented for each LIN bus specification, then the driver circuit can accurately support the specific specification requirements, but the manufacturing process becomes complex and requires separate production lines for different versions
Solution Approach 1:
The patent implements a universal driver circuit design that can support multiple LIN bus specifications (V1.3 and V2.0) through a single manufacturing process. The circuit incorporates specification selection circuitry that can be configured during packaging to operate according to different specification standards, eliminating the need for separate version-specific manufacturing lines while maintaining accurate support for each specification's requirements
2Manufacturing precision
If separate manufacturing processes are used for each LIN bus specification version, then the driver circuit can be optimized for that specific version, but production efficiency decreases and flexibility is limited
Solution Approach 1:
The patent employs a dynamic configuration approach where the driver circuit's specification mode is determined after manufacturing through packaging-stage selection. The circuit hardware remains identical across all units, but the operational specification (V1.3 or V2.0) is dynamically selected based on which input connection is actively bonded, allowing a single production line to manufacture circuits that can be flexibly assigned to different specification requirements
3Productivity
If a single integrated driver circuit supports multiple LIN bus specifications, then production efficiency and flexibility are improved, but the circuit design becomes more complex
Solution Approach 1:
The patent introduces a specification selection circuit as an intermediary component that mediates between the single integrated driver circuit and multiple specification requirements. This selection circuit includes flip-flops and pull-up resistors that act as control mechanisms, enabling the main driver circuit to operate in different specification modes without requiring complex redesign of the core driver functionality. The added complexity is localized to the selection logic rather than the entire circuit
Data Source
Figure 1
Figure 2
AI summary
An integrated driver circuit (TR) for an LIN bus comprises a first input terminal (E1), a second input terminal (E2) and an output terminal (E3, A2), which is to be connected to a bus line of the LIN bus and at which an output data signal (TXB), which is dependent on an input data signal (TX), is output, wherein the output data signal (TXB) is output in accordance with a first or in accordance with at least one second LIN bus specification as a function of whether the input data signal (TX) is applied to the first input terminal (E1) or the at least second input terminal (E2).