US Patent Issued on April 8 for "DC-coupled laser diode driver circuit with large modulation current" (Chinese Inventors)

ALEXANDRIA, Va., April 9 -- United States Patent no. 12,272,926, issued on April 8.

"DC-coupled laser diode driver circuit with large modulation current" was invented by Jinghu Li (Xiamen, China), Zhicong Luo (Xiamen, China) and Hanghui Tu (Xiamen, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A DC-coupled laser driver circuit with large modulation current belongs to the optical field. The present invention solves the problem that the conventional laser driver circuit consumes too much voltage margin because the transistor is used as the tail current source, resulting in a small modulation current. The present invention includes a negative feedback unit, an adaptive drive unit, a mirrored tail current...