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CHI-BA+KUN
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CHI-BA+KUN
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keikawa/README.md

👋 Hi there

I am Keisuke Kawahara, a Ph.D. student at Yokohama National University, Japan. My interests include integrated circuit design, silicon photonics, optical communication, microwave theory, and signal processing.

🛠️ Chip Gallery

Si Photonic Crystal Optical Modulator

Si Photonic Crystal Modulator

Achieving record low power consumption by optimizing the electrode impedance of a photonic crystal slow-light optical modulator. 📄Optica (Open Access) 📄OFC

Analog Multiplexer

Analog Multiplexer (AMUX)

World's first demonstration of bandwidth tripling of digital-to-analog converters using an analog multiplexer. 📄IEEE T-MTT 📄IEEE RWS

Active Balun

Active Balun

Active feedback technique simultaneously enables imbalance correction and bandwidth extension. 📄IEEE TCAS-I 📄IEEE MWSCAS

Distributed Amplifier

Differential Distributed Amplifier

Coupled inductors halve the chip footprint of a differential distributed amplifier. 📄IEICE TREL (Open Access) 📄IEEE ISCAS

Temperature Sensor

CMOS Temperature Sensor

The trimless temperature sensor is based on an open-source design rule and is freely reusable. GitHub Repository

Operational Amplifiers

CMOS Operational Amplifier

The class-AB CMOS operational amplifier consumes only 7.7 µA and provides a slew rate of 1 V/µs with a 1-nF load. Slides for 2021 and 2020

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