Yan He

Title: Yan He: Innovator in Circuit Design and LED Technology

Introduction

Yan He is a prominent inventor based in Shanghai, China. He has made significant contributions to the field of circuit design and LED technology, holding a total of seven patents. His innovative work has garnered attention in the industry, particularly for its practical applications in electronic devices.

Latest Patents

Among Yan He's latest patents is the "Three Level Switching Converter and Control." This invention features a circuit that includes first, second, third, and fourth transistors coupled in series, along with a control circuit. The control circuit comprises a clock generator, a current sense circuit, and a zero current differentiation zone (ZC_DF) circuit. The clock generator is designed to produce first and second clocks, with the second clock being in quadrature with the first. The current sense circuit monitors the current flowing through the first transistor, while the ZC_DF circuit defines a ZC_DF interval that starts at an edge of the second clock and concludes at the turn-on of the fourth transistor. The control circuit operates the transistors in a discontinuous conduction mode (DCM), ensuring that the first transistor is turned off during the ZC_DF interval when the current is negative.

Another notable patent is the "LED Matrix Driver to Reduce Bright Coupling." This invention includes a scan line switch connected to a scan line of an LED matrix, which is adapted to be coupled to a signal ground. It also features a first voltage clamp linked to the scan line switch and the scan line, as well as a second voltage clamp connected to the scan line.

Career Highlights

Yan He has worked with several prestigious companies throughout his career, including Texas Instruments Corporation and IBM. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking technologies in the electronics sector.

Collaborations

Yan He has collaborated with notable colleagues, including Qingjie Ma and Yang Wayne Wang. These partnerships have fostered an environment of innovation and creativity, leading to the development of advanced technologies.

Conclusion

Yan He's contributions to circuit design and LED technology exemplify his innovative spirit and dedication to advancing the field. His patents reflect a deep understanding of electronic systems and their applications, making him a significant figure in the industry.