The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 21, 2009
Filed:
Aug. 21, 2007
Sheng-lyang Jang, Taipei, TW;
Chun-chieh Chao, Yilan, TW;
Yun-hsueh Chang, Taoyuan, TW;
Shao-hwa Lee, Taipei, TW;
Sheng-Lyang Jang, Taipei, TW;
Chun-Chieh Chao, Yilan, TW;
Yun-Hsueh Chang, Taoyuan, TW;
Shao-Hwa Lee, Taipei, TW;
National Taiwan University of Science & Technology, Taipei, TW;
Abstract
An injection locked frequency divider includes a ring oscillator, a first injection unit and a second injection unit. The ring oscillator includes a first delay cell and a second delay cell each including differential input terminals and differential output terminals. The differential input terminals and the differential output terminals of the first delay cell are respectively coupled to the differential output terminals and the differential input terminals of the second delay cell. The first injection unit connected between the differential output terminals of the first delay cell receives and injects a first injection signal to the differential output terminals of the first delay cell. The second injection unit connected between the differential output terminals of the second delay cell receives and injects a second injection signal to the differential output terminals of the second delay cell.