Pulse Transformer Circuit for Isolated Signal Transmission
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Solution Overview
Problem
Existing signal transmission devices for pulse signals face challenges in efficiently isolating between input and output while maintaining high reliability and cost-effectiveness, particularly in applications like power supply and motor driving devices, where high-voltage processes are required.
Innovation Solution
A semiconductor integrated circuit device with a pulse transmission circuit and transformer chip configuration that isolates between primary and secondary circuit systems using transformers, eliminating the need for dedicated high-voltage processes by integrating a controller chip, driver chip, and transformer chip in a single package, utilizing spiral coils for isolation and pulse transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated high-voltage processes are used to ensure isolation between primary and secondary circuit systems, then reliability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent introduces a transformer as an intermediary device between the primary and secondary circuit systems. The transformer provides galvanic isolation through magnetic coupling, eliminating the need for direct high-voltage isolation processes while maintaining reliable signal transmission across isolated boundaries.
Solution Approach 2:
The patent replaces complex high-voltage electrical isolation processes with a magnetic field-based transformation approach. By using electromagnetic induction in transformers, the system achieves isolation without requiring sophisticated high-voltage manufacturing processes, thus reducing manufacturing complexity.
2Ease of manufacture
If multiple separate chips (controller chip, driver chip, transformer chip) are integrated in a single package, then manufacturing cost is reduced, but device density and integration difficulty increase
Solution Approach 1:
The patent merges the controller chip, driver chip, and transformer chip into a single integrated package. This consolidation reduces the total number of discrete components, simplifies assembly processes, and lowers manufacturing costs while maintaining the functional independence of each subsystem through modular design.
Solution Approach 2:
The patent segments the integrated package into distinct functional modules (controller chip, driver chip, transformer chip), each performing specific functions. This segmentation allows for independent optimization and testing of each module while facilitating easier integration and replacement within the unified package structure.
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 enables efficient pulse signal transmission while reducing manufacturing costs and eliminating the need for high-voltage processes, suitable for applications in vehicles and other devices, enhancing reliability and efficiency.
Implementation Method 1
a pulse transmission circuit and a transformer chip that includes two transformers, each having a primary coil and a secondary coil
Data Source
AI summary
For example, a pulse transmission circuit includes: a constant current source configured to generate a constant current; a capacitor configured to be charged using the constant current (e.g., a charge current generated by mirroring the constant current); and a discharge switch configured to pass a discharge current from the capacitor to a transformer according to a pulse edge in an input pulse signal, thereby to pulse-drive the transformer.