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:
Jun. 06, 1989
Filed:
Jul. 20, 1987
Katsuhiro Sasaki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A multiplexer includes first and second frequency dividers and first and second selectors. The first frequency divider receives a clock signal which determines a multiplexing time slot and outputs a first signal every M (M.gtoreq.2) time slots. The second frequency divider receives the first signal from said first frequency divider and outputs N (N.gtoreq.1) second signals having different phases. The first selector converts N insertion codes such as a frame synchronization code and a service code into one code signal train on the basis of the second signals. The second selector receives a digital data signal train having an alternate repetition of a digital data signal using (M-1) continuous time slots and a gap of one time slot and inserts the insertion codes of the code signal train on the basis of the first signal.