Company Filing History:
Years Active: 1996-2007
Title: Innovations of Katsuyosi Yamamoto
Introduction
Katsuyosi Yamamoto is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of solid-state image pickup devices. With a total of 7 patents to his name, his work has had a considerable impact on imaging technology.
Latest Patents
One of his latest patents is an X-Y address type solid-state image pickup device with an image averaging circuit disposed in the noise cancel circuit. This invention relates to a device manufactured by a CMOS process, aiming to provide an efficient solid-state image pickup device without increasing chip area or manufacturing costs. The device features pixel regions arranged in a matrix form, which includes a photodiode and a source follower amplifier for converting electric charge into voltage. Additionally, it incorporates a horizontal selection transistor for outputting image data and an amplifier/noise cancel circuit with a built-in image averaging circuit for processing image data from multiple pixel regions.
Another notable patent is a CMOS sensor circuit that includes a voltage control circuit controlling the gate potential of a photodiode reset transistor. This circuit resets the photodiode to an initial voltage and consists of an inverter circuit that drives the gate of the reset transistor. The design includes a P-channel MOS transistor and an N-channel MOS transistor, along with a transistor that controls blooming.
Career Highlights
Katsuyosi Yamamoto is currently employed at Fujitsu Corporation, where he continues to innovate in the field of imaging technology. His work has been instrumental in advancing the capabilities of solid-state image sensors.
Collaborations
He has collaborated with notable coworkers such as Masatoshi Kokubun and Chikara Tsuchiya, contributing to various projects and innovations within the company.
Conclusion
Katsuyosi Yamamoto's contributions to imaging technology through his patents and work at Fujitsu Corporation highlight his role as a significant inventor in the field. His innovations continue to shape the future of solid-state image pickup devices.