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:
May. 10, 2005
Filed:
Jun. 11, 2003
Noboru Kusama, Tokyo, JP;
Katsuya Kitada, Tokyo, JP;
Masahiro Akiyama, Tokyo, JP;
Takashi Nakagawa, Tokyo, JP;
Noriko Sato, Tokyo, JP;
Noboru Kusama, Tokyo, JP;
Katsuya Kitada, Tokyo, JP;
Masahiro Akiyama, Tokyo, JP;
Takashi Nakagawa, Tokyo, JP;
Noriko Sato, Tokyo, JP;
NEC Engineering Ltd., Tokyo, JP;
Abstract
In response to changes in an input binary digital signal, a 3rd order cosine pulse waveform, which, when it is changed in the increasing direction, has '0' level in a first period of T/12 (T corresponding to one-half cycle of the binary digital signal), is changed as a waveform of (h/2)(1+cos(3πt/T)+π/4) in the next period of 4T/12 (−5T/12≦t≦−T/12) and has an h (constant) level in the remaining period of T/12, and when it is changed in the reducing direction, has the h level in the first period of T/12, is changed as a waveform of (h/2)(1+cos(3πt/T)−π/4) in the next period of 4T/12 (T/12≦t≦5T/12) and also has '0' level in the remaining period of T/12. By using this pulse wave, a flat part is generated in a time width of T/12 with respect to a judgment point. It is thus possible to improve the immunity to the effects of digital signal jitter, obtain change judgment with a sole single pulse and reduce the circuit scale and the power consumption.