Kazuaki Sogawa

Title: Kazuaki Sogawa: Innovator in Phase Adjustment and Synchronizing Circuits

Introduction

Kazuaki Sogawa is a notable inventor based in Osaka, Japan. He holds a total of eight patents, showcasing his contributions to the field of electronic engineering. His work primarily focuses on phase adjustment and synchronizing circuits, which are essential in various electronic applications.

Latest Patents

One of his latest patents is the "Phase Adjustment Circuit." This invention involves a phase adjustment circuit that divides the frequency of a double-frequency clock to obtain a 50% duty-cycle clock. It features a first frequency division circuit with a phase inversion function that generates an intermediate reference clock, which is out of phase with both a phase reference clock and a phase-adjusted clock. A first phase control circuit manages the phase of the intermediate reference clock to align it with the desired phase state relative to the phase reference clock. Additionally, a second phase control circuit adjusts the phase of the phase-adjusted clock concerning the intermediate reference clock. This design allows for accurate and stable determination of the phase difference between the clocks, even in the presence of clock jitter.

Another significant patent is the "Phase Synchronizing Circuit." In this invention, a constant determination unit calculates various constants, including the charge current from a charge pump circuit, the time constant of a loop filter, and the gain of a voltage-controlled oscillator. These constants are used to ensure that the proportionality constant of the natural frequency of a phase-locked loop circuit aligns with predetermined values. The charge pump circuit, loop filter, and voltage-controlled oscillator adjust their parameters based on control signals from the constant determination unit, enhancing the performance of the phase-locked loop circuit.

Career Highlights

Kazuaki Sogawa has had a distinguished career, working with prominent companies such as Matsushita Electric Industrial Co., Ltd. and Panasonic Corporation. His experience in these organizations has significantly contributed to his expertise in electronic circuit design and innovation.

Collaborations

Throughout his career, Sogawa has collaborated with notable colleagues, including Shiro Dosho and Yuji Yamada. These partnerships have likely fostered a creative environment that has led to the development of his innovative patents.

Conclusion

Kazuaki Sogawa's contributions to the field of electronic engineering, particularly in phase adjustment and synchronizing circuits, highlight his innovative spirit and technical expertise.