Shigemitsu Horikawa

Title: Shigemitsu Horikawa: Innovator in Voltage Control and Comparator Circuits

Introduction

Shigemitsu Horikawa is a notable inventor based in Saitama, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of voltage control and comparator circuits. With a total of 3 patents to his name, Horikawa's work showcases his innovative approach to solving complex electrical challenges.

Latest Patents

One of Horikawa's latest patents is a voltage control circuit. This circuit accepts an input voltage and produces a regulated output voltage. The design includes improved responsiveness to variations in input voltage, load current, and ambient temperature. Notably, it features an NPN transistor connected between the input and output terminals, controlled by a feedback circuit. In one embodiment, the feedback circuit utilizes a PMOS transistor, while in another, it employs a PNP transistor.

Another significant patent is a comparator circuit designed to operate without generating malfunctions. This circuit comprises a differential amplification circuit with a differential pair transistor for inputting a signal for comparison. It also includes a current mirror load circuit, a latch circuit with inversion amplifiers, an equalization transistor, and a delay circuit. These components work together to ensure accurate signal processing and control.

Career Highlights

Throughout his career, Shigemitsu Horikawa has worked with prominent companies such as Oki Electric Industry Co., Ltd. and Oki Semiconductor Co., Ltd. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects in the field of electronics.

Collaborations

Horikawa has collaborated with notable individuals in his field, including Yukio Nakamura and Kazuo Tokura. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Shigemitsu Horikawa's contributions to voltage control and comparator circuits highlight his innovative spirit and technical expertise. His patents reflect a commitment to advancing electrical engineering and improving circuit design. Through his work, Horikawa continues to influence the industry and inspire future inventors.