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. 02, 2002
Filed:
Sep. 29, 2000
Applicant:
Inventor:
Kazuyuki Nakamura, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 1/716 ;
U.S. Cl.
CPC ...
H03K 1/716 ;
Abstract
A duty ratio correction circuit includes a pair of circuit blocks each having an input stage inverter for receiving one of complementary clock signals, a first waveform correction circuit for receiving an output from a corresponding one of the input stage inverter, and a second waveform correction circuit for receiving the other of the complementary signals. Each of the waveform correction circuits has a lower output impedance at an initial stage of signal transition of the input signal and a higher output impedance at a subsequent stage of the signal transition.