Universal null DTE

Patent · Tue Jun 20 04:00:00 EDT 1989

OSTI ID:5392898

George, M; Pierson, L G; Wilkins, M E

This patent describes a communication device in the form of data terminal equipment which permits two data communication equipments, each having its own master clock and operating at substantially the same nominal clock rate, to communicate with each other as a multi-segment circuit configuration of a general communication network even when phase or frequency errors exist between the two clocks. Data transmitted between communication equipments of two segments of the communication network is buffered. A variable buffer fill circuit is provided to fill the buffer to a selectable extent prior to initiation of data output clocking. Selection switches are provided to select the degree of buffer preload. A dynamic buffer fill circuit may be incorporated for automatically selecting the buffer fill level as a function of the difference in clock frequencies of the two equipments. Controllable alarm circuitry is provided for selectively generating an underflow or an overflow alarm to one or both of the communicating equipments.

• Assignee: Dept. of Energy, Washington, DC
• Patent Number(s): US 4841550
• OSTI ID: 5392898
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)
99 GENERAL AND MISCELLANEOUS
990220* -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
990300 -- Information Handling
ALARM SYSTEMS
AUTOMATION
COMMUNICATIONS
DATA TRANSMISSION SYSTEMS
ELECTRONIC CIRCUITS