Company Filing History:
3 out of 707 
2 out of 4,979 Years Active: 2007-2010
Title: Danya Sugai: Innovator in Digital-to-Analog Conversion Technology
Introduction
Danya Sugai is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of digital-to-analog conversion technology. With a total of 5 patents to his name, Sugai has developed innovative solutions that enhance the performance and efficiency of electronic devices.
Latest Patents
One of Sugai's latest patents is a digital-to-analog converter that carries out calibration operations for current source cells. This current cell matrix type of digital-to-analog (D/A) converter is designed to prevent the deterioration of a.c. characteristics on a current path during digital-to-analog conversion. It features an array of current source cells arranged in a matrix configuration, with each cell including a current source transistor to generate the cell current. During regular operation, the cell current flows on output lines via a first transistor connected in cascode to the current source transistor. During calibration, the cell current is directed into a current comparator via a second transistor, effectively preventing parasitic capacitance from affecting the current path.
Another notable patent is a reference current generator circuit that suppresses variations in the production of parts while achieving a voltage reduction. This innovation helps in minimizing power consumption. The circuit includes current generating parts, differential amplifying parts, and output circuit parts that provide first and second reference currents. By maintaining the same potential across respective voltages, the PMOS transistors operate in a linear region, enhancing the circuit's efficiency.
Career Highlights
Danya Sugai has worked with notable companies such as Oki Semiconductor Co., Ltd. and Oki Electric Industry Co., Ltd. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking technologies in the semiconductor industry.
Collaborations
Sugai has collaborated with talented individuals in his field, including Naoaki Sugimura and Teruaki Uehara. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.
Conclusion
Danya Sugai is a distinguished inventor whose work in digital-to-analog conversion technology has made a significant impact in the electronics industry. His innovative patents and collaborations highlight his commitment to advancing technology and improving electronic device performance.