Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1991-12-19
1993-06-22
Kuntz, Curtis
Pulse or digital communications
Spread spectrum
Direct sequence
3701053, H04L 302
Patent
active
052221083
ABSTRACT:
In a cell transmission phase and rate converting circuit for use in an ATM communication system, an internal write-in pulse generator (41) generates an internal write-in pulse sequence (IWP) having a predetermined write-in period on the basis of each cell phase pulse of an external write-in pulse sequence (EWP) although any cell phase pulse of the external write-in pulse sequence (EWP) is not supplied thereto. An internal read-out pulse generator (51) generates an internal read-out pulse sequence (IRP) having a predetermined read-out period on the basis of each cell phase pulse of an external read-out pulse sequence (ERP) although any cell phase pulse of the external read-out pulse sequence (ERP) is not supplied thereto. A main control unit (12a) controls an FIFO buffer (11) to write a write-in cell data (WCD) into the FIFO buffer (11) as held cell data in response to a write-in clock signal (WCK) and the internal write-in pulse sequence (IWP) and to read the held cell data out of the FIFO buffer (11) as read-out cell data (RCD) in response to a read-out clock signal (RCK) and the internal read-out pulse sequence (IRP).
REFERENCES:
patent: 5091907 (1992-02-01), Wettengel
patent: 5119406 (1992-06-01), Kramer
patent: 5132970 (1992-07-01), Urbansky
Bocure Tesfaldet
Kuntz Curtis
NEC Corporation
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