Masaru Sekiguchi

Title: Masaru Sekiguchi: Innovator in Digital-to-Analog Converters

Introduction

Masaru Sekiguchi is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of digital-to-analog converters, holding a total of 5 patents. His work focuses on enhancing the performance and accuracy of these essential electronic components.

Latest Patents

Sekiguchi's latest patents include innovative designs for current cell type digital-to-analog converters. One of his notable inventions features a current cell matrix that consists of 63 upper current cells and one lower current cell. Each current cell is equipped with four constant current transistors of uniform size. When selected by the upper decoder, the upper current cell outputs drain currents from all its transistors. The lower current cell, on the other hand, can output drain currents from none, one, or two constant current transistors based on the select signal from the lower decoder. This design allows the analog output terminal to combine and output the currents from the selected constant current cells, resulting in decreased differential linearity error and integral linearity error.

Another significant patent is the current cell matrix type digital-to-analog converter. This converter selects desired unit current cells according to an input code and supplies currents from the selected cells to a load resistor, generating an analog voltage Vdac. By providing a constant current from both selected and non-selected cells to an offset adjuster circuit, which includes an adjusting resistor, the converter can output a voltage Vout that is the sum of the analog voltage Vdac and the offset voltage Vos.

Career Highlights

Masaru Sekiguchi is currently employed at Oki Electric Industry Co., Ltd., where he continues to innovate in the field of electronics. His work has significantly impacted the development of digital-to-analog conversion technologies.

Collaborations

Sekiguchi has collaborated with notable colleagues, including Takashi Taya and Masao Kamio, contributing to various projects and advancements in their field.

Conclusion

Masaru Sekiguchi's contributions to digital-to-analog converters demonstrate his expertise and commitment to innovation. His patents reflect a deep understanding of electronic design and a drive to improve technology for future applications.