Hiroki HIGA


Numerical Investigation of Octagonal Photonic Crystal Fibers with Strong Confinement Field
Kenta KANESHIMA Yoshinori NAMIHIRA Nianyu ZOU Hiroki HIGA Yasunori NAGATA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/06/01
Vol. E89-C  No. 6  pp. 830-837
Type of Manuscript:  PAPER
Category: Optoelectronics
Keyword: 
photonic crystal fiber (PCF)confinement lossmode field diameter (MFD)chromatic dispersioneffective area (Aeff)
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A Basic Study on a Very Low-Level DC Current Amplifier Using a Switched-Capacitor Circuit
Hiroki HIGA Naoki NAKAMURA Ikuo NAKAMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/06/01
Vol. E88-A  No. 6  pp. 1394-1400
Type of Manuscript:  Special Section PAPER (Special Section on Papers Selected from 2004 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2004))
Category: 
Keyword: 
dc amplifiersmall current measurementnegative feedbackpositive feedbackswitched-capacitor
 Summary | Full Text:PDF(755KB)

A Basic Study on Noise Source Modeling for a Very Low-Level DC Current Amplifier
Hiroki HIGA Jun IWAKI Ikuo NAKAMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/06/01
Vol. E88-A  No. 6  pp. 1401-1407
Type of Manuscript:  Special Section PAPER (Special Section on Papers Selected from 2004 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2004))
Category: 
Keyword: 
DC amplifiernegative feedbackpositive feedbacknoise model
 Summary | Full Text:PDF(1.2MB)

A Basic Study on Control Command Input Device Using Head Movement for FES System--Availability of Acceleration Sensors--
Hiroki HIGA Ikuo NAKAMURA Nozomu HOSHIMIYA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/06/01
Vol. E87-A  No. 6  pp. 1441-1445
Type of Manuscript:  Special Section PAPER (Special Section on Papers Selected from 2003 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2003))
Category: 
Keyword: 
functional electrical stimulation (FES)control command inputthe head movementacceleration sensor
 Summary | Full Text:PDF(831.7KB)