"W. Li,Y. Niimi,Y. Orino,S. Hirata,M. K. Kurosawa","A frequency synchronization method for a self-oscillating PWM signal generator",,"IEEE Transactions on Circuits and Systems II: Express Briefs",,"Vol. 61","No. 4","pp. 244-248",2014,Feb. "VŒĐ‰Ã’,Ü–ė—Tˆę˜Y,•āVŽĀ,•Ð‹Ë’","ƒĒƒ°•Ï’ē‚ð—p‚Ē‚―ƒLƒƒƒŠƒA•Ï’ē•ûŽŪPWM •ÏŠ·‚ĖŒŸ“Ē",,"“dŽqî•ņ’ʐMŠw‰ï‘‡‘å‰ïu‰‰˜_•ķW",,,,"p. 15",2008,Mar.