I am Keisuke Kawahara, an Assistant Professor at Institute of Science Tokyo. I’m interested in electornic and photonic integrated circuit.

	Co-packaged slow-light transmitter 0.78-pJ/bit optical transmitter for multi-terabit co-packaged optics enabled by electronics-photonics co-design. 📄IEEE JSTQE (🔓), 📄OECC PDP, 📄ECOC
	Si Photonic Crystal Optical Modulator Achieving record low-power Si slow-light modulator by optimizing the electrode impedance. 📄Optica (🔓), 📄OFC
	Analog Multiplexer First demonstration of bandwidth tripling of digital-to-analog converters. 📄IEEE T-MTT, 📄IEEE RWS
	Active Balun Imbalance correction and bandwidth extension are simultaneously achieved by an active feedback technique. 📄IEEE TCAS-I, 📄IEEE MWSCAS
	Distributed Amplifier Coupled inductors halve the chip footprint of a differential distributed amplifier. 📄IEICE TREL (🔓), 📄IEEE ISCAS
	Temperature Sensor The trimless temperature sensor is based on an open-source design rule and is freely reusable. GitHub Repository
	Operational Amplifiers The class-AB CMOS operational amplifier consumes only 7.7 µA and provides a slew rate of 1 V/µs for a 1-nF load. Slides for 2021 and 2020