Kenichi TAJIMA

Parallel Dual Modulus Prescaler with a Step Size of 0.5
Hideyuki NAKAMIZO  Kenichi TAJIMA  Ryoji HAYASHI  Kenji KAWAKAMI  Toshiya UOZUMI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/07/01
Vol. E95-C  No. 7  pp. 1189-1194
Type of Manuscript: Special Section PAPER (Special Section on Recent Trends of Microwave Systems and Their Fundamental Technologies)
Category: 
Keyword: 
phase locked loops,  divider,  phase noise,  fractional-N frequency synthesizer,  dual modulus prescaler, 
  Summary |  Full Text:PDF (1.2MB)
A Novel Spur Suppression Technique Using Three-Phase Holding Pulse for High-Frequency-Output Direct Digital Synthesizer
Kenichi TAJIMA  Ryoji HAYASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/07/01
Vol. E93-C  No. 7  pp. 1014-1021
Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies)
Category: 
Keyword: 
direct digital synthesizer,  holding pulse,  digital analog converter, 
  Summary |  Full Text:PDF (1.2MB)
Novel Phase-Continuous Frequency Hopping Control for a Direct Frequency Synthesizer Using a Quadrature Mixer Driven by Two DDSs
Kenichi TAJIMA  Ryoji HAYASHI  Kenji ITOH  Yoji ISOTA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/12/01
Vol. E89-C  No. 12  pp. 1829-1835
Type of Manuscript: Special Section PAPER (Special Section on Emerging Microwave Techniques)
Category: Active Circuits/Devices/Monolithic Microwave Integrated Circuits
Keyword: 
frequency synthesizer,  direct digital synthesizer,  quadrature mixer,  phase accumulator,  overflow,  phase, 
  Summary |  Full Text:PDF (829.1KB)