Daisuke Hamano

Title: Daisuke Hamano: Patents in High-Speed Communications

Introduction

Daisuke Hamano is an inventor based in Hachioji, Japan, whose work includes technologies for clock recovery and high-speed serial data reception. He is associated with Hitachi, Ltd. and has 3 patents.

Latest Patents

Hamano’s listed patents include “Phase locked loop,” “CDR circuit,” and “Receiving circuit.” The phase-locked-loop invention uses two phase comparators and weighted outputs to adjust a feedback clock. This approach can allow a lower-frequency reference clock and help reduce power consumption.

His work also includes “Semiconductor integrated circuit device and method for evaluating an eye-opening margin.” The method measures the eye-opening margin of a high-speed serial data reception circuit while its clock data recovery circuit operates without a fixed clock phase. An offset pulse can add jitter to phase information, enabling measurement and accelerated error testing. The described device uses SerDes and reference SerDes circuits to recover serial data and control the recovery clock’s phase.

Career Highlights

Hamano’s patent portfolio focuses on semiconductor circuits and signal-reception techniques. His inventions address clock synchronization, power consumption, and evaluation of signal quality in high-speed data systems.

Collaborations

Hamano’s listed coworkers include Atsuhiro Hayashi and Koji Fukuda. His work is associated with Hitachi, Ltd.

Conclusion

Daisuke Hamano’s patents reflect contributions to clock recovery and high-speed data reception, with an emphasis on efficient circuit operation and signal-quality measurement.