Kouichi Ishimi

Title: Innovations of Kouichi Ishimi

Introduction

Kouichi Ishimi is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of clock generation technology, holding a total of 9 patents. His work focuses on enhancing the efficiency and reliability of clock generators, which are essential components in various electronic devices.

Latest Patents

One of his latest patents is a phase-shift-resistant, frequency variable clock generator. This innovative clock generator includes a frequency divider that outputs a divided clock signal by dividing an input clock signal according to a dividing ratio control signal. Additionally, it features a phase adjusting circuit that aligns the phase of an internal clock signal with that of an external clock signal. The design incorporates a dividing ratio control signal inhibiting circuit that disables the dividing ratio control signal while a lock signal from the phase adjusting circuit is active. This mechanism allows the frequency divider to generate a specific clock signal and change the frequency of the divided clock signal in synchronism with the particular clock signal, effectively preventing frequency shifts during frequency switching and conserving power.

Another notable patent is a method and circuitry for generating clocks. This circuitry includes a frequency dividing circuit that divides the frequency of an input clock by various predetermined ratios to produce multiple frequency-divided clocks. The clock with the highest frequency is slightly delayed compared to the others. When the output clock frequency changes, a multiplexer switches from the previously selected clock to the desired one based on a control signal. This design ensures that the first clock pulse generated during the switching operation maintains a pulse width that is not shorter than that of the highest frequency clock, accommodating variations in manufacturing and operating conditions.

Career Highlights

Kouichi Ishimi is associated with Mitsubishi Electric Corporation, a leading company in the electronics industry. His work has significantly impacted the development of advanced clock generation technologies, making him a valuable asset to his organization.

Collaborations

Throughout his career, Kouichi has collaborated with notable colleagues, including Kiyoshi Hayase and Kazuyuki Ishikawa. These collaborations have fostered innovation and contributed to the advancement of technology in their field.

Conclusion

Kouichi Ishimi's contributions to clock generation technology through his patents demonstrate his expertise and commitment to innovation. His work continues to influence the electronics industry, paving the way for more efficient and reliable devices.