Transformer-Isolated Pulse Signal Transmission for Low-Voltage Gate Drive

The patent introduces an isolation circuit as an intermediary component between the transmission circuit and reception circuit. This isolation circuit uses transformers to couple the primary and secondary sides, enabling signal transmission while maintaining electrical isolation. The intermediary isolation circuit allows the use of lower withstand-voltage processes for the main circuits, reducing manufacturing complexity and cost while preserving signal transmission reliability.

The patent divides the signal transmission system into three separate modules: transmission circuit, isolation circuit, and reception circuit. Each module can be manufactured using optimized processes suitable for its specific requirements. The transmission and reception circuits can use low-to-middle withstand-voltage processes, while the isolation circuit handles the high-voltage isolation requirements, thereby reducing overall manufacturing complexity.

The patent employs periodic pulse signaling with specific duty cycles and timing patterns. The transmission circuit generates periodic pulse signals that are optimized for transformer coupling, ensuring reliable transmission at high speeds. The periodic nature of the signals allows for consistent transformer operation and reduces signal distortion.

The patent incorporates feedback mechanisms in the reception circuit to detect and correct signal degradation. The reception circuit monitors the received pulse signals and uses feedback control to compensate for distortion and loss, maintaining signal quality even at high transmission speeds. This feedback ensures that the transmitted and received signals remain synchronized and accurate.