Company Filing History:
4 out of 259 
3 out of 617 
1 out of 1,311 
Years Active: 2015-2021
Title: Innovations by Zaifeng Shi
Introduction
Zaifeng Shi is a prominent inventor based in Tianjin, China. He has made significant contributions to the field of analog integrated circuit design, holding a total of seven patents. His work focuses on enhancing imaging technologies, particularly in CMOS image sensors and X-ray imaging systems.
Latest Patents
One of Zaifeng Shi's latest patents is the "High scanning frequency CMOS-TDI image sensor." This invention relates to the technical field of analog integrated circuit design. The TDI function is better realized by the CMOS image sensor, which improves the scanning frequency and extends the application range of the TDI technique. The proposed technical solution includes pixels that consist of a photodiode, an operational amplifier, integration capacitors of the same capacitance, an offset voltage removing capacitor, and multiple switches. The anode of the photodiode is connected to a zero voltage ground wire, while the cathode is connected to one end of a switch. The other end of the switch is connected to a reference voltage. The pixels are cascaded, and the output end of the last pixel connects to a column-parallel ADC through a readout switch. This invention primarily applies to analog integration circuit design.
Another notable patent is for "X-ray phase contrast and dark-field information extraction with electric fringe scanning and/or active pixel processing." This invention provides novel systems and methods for performing X-ray imaging by extracting X-ray phase-shift and dark-field information through a detector with built-in G2 functionality. The need for mechanical stepping processes is eliminated by replacing grating translation with an electrical operation during detection.
Career Highlights
Zaifeng Shi has worked at prestigious institutions such as Tianjin University and Rensselaer Polytechnic Institute. His experience in these organizations has contributed to his expertise in the field of imaging technologies.
Collaborations
He has collaborated with notable coworkers, including Suying Yao and Jiangtao Xu, who have contributed to his research and development efforts.
Conclusion
Zaifeng Shi's innovative work in imaging technologies and analog integrated circuit design has led to significant advancements in the field. His patents reflect a commitment to improving imaging systems, making him a noteworthy inventor in the industry.