Koji OBATA


A Low Distortion 3rd-Order Continuous-Time Delta-Sigma Modulator for a Worldwide Digital TV-Receiver
Koji OBATA Kazuo MATSUKAWA Yosuke MITANI Masao TAKAYAMA Yusuke TOKUNAGA Shiro SAKIYAMA Shiro DOSHO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/02/01
Vol. E95-A  No. 2  pp. 471-478
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
continuous-timedelta sigma modulatorharmonic distortiontuning system
 Summary | Full Text:PDF(3.1MB)

Automated Passive-Transmission-Line Routing Tool for Single-Flux-Quantum Circuits Based on A* Algorithm
Masamitsu TANAKA Koji OBATA Yuki ITO Shota TAKESHIMA Motoki SATO Kazuyoshi TAKAGI Naofumi TAKAGI Hiroyuki AKAIKE Akira FUJIMAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/04/01
Vol. E93-C  No. 4  pp. 435-439
Type of Manuscript:  Special Section PAPER (Special Section on Frontiers of Superconductive Electronics)
Category: Digital Applications
Keyword: 
single-flux-quantum circuitcomputer-aided designwire routerpassive transmission line
 Summary | Full Text:PDF(970.9KB)

A Clock Scheduling Algorithm for High-Throughput RSFQ Digital Circuits
Koji OBATA Kazuyoshi TAKAGI Naofumi TAKAGI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/12/01
Vol. E91-A  No. 12  pp. 3772-3782
Type of Manuscript:  PAPER
Category: VLSI Design Technology and CAD
Keyword: 
clock schedulingclock skewmicropipelineRSFQ
 Summary | Full Text:PDF(460.1KB)

A Method of Sequential Circuit Synthesis Using One-Hot Encoding for Single-Flux-Quantum Digital Circuits
Koji OBATA Kazuyoshi TAKAGI Naofumi TAKAGI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/12/01
Vol. E90-C  No. 12  pp. 2278-2284
Type of Manuscript:  PAPER
Category: Superconducting Electronics
Keyword: 
sequential circuit synthesisone-hot encodingsingle-flux-quantum (SFQ)
 Summary | Full Text:PDF(255.3KB)

Logic Synthesis Method for Dual-Rail RSFQ Digital Circuits Using Root-Shared Binary Decision Diagrams
Koji OBATA Kazuyoshi TAKAGI Naofumi TAKAGI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/01/01
Vol. E90-A  No. 1  pp. 257-266
Type of Manuscript:  PAPER
Category: VLSI Design Technology and CAD
Keyword: 
logic synthesisdual-railRSFQbinary decision diagrams (BDDs)
 Summary | Full Text:PDF(462.9KB)