Yoshikazu Maeyama

Title: Innovations of Yoshikazu Maeyama

Introduction

Yoshikazu Maeyama is a notable inventor based in Kyoto, Japan. He has made significant contributions to the field of semiconductor memory technology. With a total of 2 patents, his work has had a lasting impact on memory control devices.

Latest Patents

One of his latest patents is a memory control device designed for controlling random access memory. This device features an arbiter that generates write start and read start signals in response to WRITE and READ commands, which are derived from frequency-dividing writing and reading clock signals. Additionally, it includes a memory control circuit composed of first and second delay circuits that delay the write start and read start signals by predetermined times. The device also incorporates first and second RS flip-flop circuits that generate write and read control signals based on the write start and read start signals, respectively, which are reset by signals from the delay circuits.

Another significant patent is for a layout that enables stable high-speed operation in semiconductor memory devices. In this design, the memory cell array is divided into at least two portions on a substrate. A serial memory element, such as a shift register, along with control signal lines, is strategically placed between these two portions. This arrangement minimizes the length of control signal lines and data lines, thereby reducing stray or parasitic capacitance and achieving higher speed and stable operation of the device.

Career Highlights

Yoshikazu Maeyama has worked with prominent companies in the electronics industry, including Matsushita Electronics Corporation and Matsushita Electric Industrial Co., Ltd. His experience in these organizations has contributed to his expertise in memory technology.

Collaborations

Throughout his career, Maeyama has collaborated with notable colleagues such as Masahiko Sakagami and Hideki Kawai. These partnerships have likely enriched his work and led to innovative advancements in the field.

Conclusion

Yoshikazu Maeyama's contributions to memory control devices and semiconductor technology highlight his role as a significant inventor. His patents reflect a commitment to innovation and improvement in electronic memory systems.