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:
Jul. 23, 2013
Filed:
Jan. 28, 2010
Munehiko Nagatani, Kanagawa, JP;
Hideyuki Nosaka, Kanagawa, JP;
Shogo Yamanaka, Kanagawa, JP;
Kimikazu Sano, Kanagawa, JP;
Koichi Murata, Kanagawa, JP;
Munehiko Nagatani, Kanagawa, JP;
Hideyuki Nosaka, Kanagawa, JP;
Shogo Yamanaka, Kanagawa, JP;
Kimikazu Sano, Kanagawa, JP;
Koichi Murata, Kanagawa, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
Two D flip-flops (D-FF, D-FF) output two half-rate signals (D, D) by dividing a digital input signal (D) into two signals and retiming them based on a clock signal (CLK) and a negative-phase clock signal (CLKB). First and second switches (S, S) are driven by the two half-rate signals (D, D). Third and fourth switches (S, S) are driven by a select signal SW and a negative-phase select signal SWB that have the same frequency as that of the clock signal (CLK) but a different phase from that of the clock signal (CLK). The current supplied from a current source () to a load () thus becomes a current signal corresponding to a conversion frequency twice the frequency of the clock signal (CLK).