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:
Oct. 24, 2006
Filed:
Jan. 26, 2006
Satomi Shioiri, Tokyo, JP;
Kiyoshi Fukuchi, Tokyo, JP;
Satomi Shioiri, Tokyo, JP;
Kiyoshi Fukuchi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Transmission delay time measurement is performed on a signal propagation path between respective points of two printed circuit boards connected by a coaxial cable. Measurement is made of a frequency-domain response of the cable and a first time-domain response of the propagation path at its sending point and a second time-domain response of the propagation path at its receiving point. From the first time-domain response and the frequency-domain response, estimation is made of a third time-domain response of the propagation path that would be observed at the receiving point if there is no waveform distortion on the surface of the printed circuit boards. Time-domain correlation is calculated between the second and third time-domain responses. A first delay time is determined from the estimated time-domain response and a second delay time is determined from the correlation. The first and second delay times are summed to yield the transmission delay time of the propagation path.