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. 11, 1985
Filed:
Dec. 23, 1982
Jean-Claude Abbiate, La Gaude, FR;
International Business Machines Corporation, Armonk, NY (US);
Abstract
An interface device for synchronizing an internally clocked modem and data terminal equipment (DTE) provided with their own clock circuits, each of said own terminal clock circuit providing an external clock signal (RC Ext). The interface includes a PLO generating a recovered clock signal (XCO). At a moment defined by a request to send signal the phases of XCO and RC Ext are compared with each other and a switched clock signal SWC oscillating at a fast rate for a time interval corresponding to the phase delay between RC Ext and XCO and subsequently oscillating at a slow rate, is generated. The signal SWC is used for shifting RC Ext and terminal provided data RD Ext into shift registers respectively. The shifted RC Ext is used for controlling the adjustment of the interface PLO.