Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1984-05-24
1986-12-30
Bookbinder, Marc E.
Pulse or digital communications
Spread spectrum
Direct sequence
370 91, 178 69R, H04L 2300
Patent
active
046334890
ABSTRACT:
An interface unit is disclosed which can make asynchronous data communication between a transmitter unit and a receiver unit. The interface unit includes a shift register for receiving start data designating a start of data input and input data from the transmitter unit. The start data is used as an interruption signal indicating data input to the receiver unit and is used as an inhibition signal for inhibiting clock application to the transmitter unit. The inhibition of clock application is removed by a control signal transferred from the receiver unit to the interface unit. Clock application to the transmitter unit is restarted in response to the control signal, and a next new data is transferred to the interface unit. Thus, the interface unit can easily and smoothly control asynchronous data communication between the transmitter unit and the receiver unit by means of simple circuits.
REFERENCES:
patent: 4216389 (1980-08-01), Carter
patent: 4390969 (1983-06-01), Hayes
patent: 4403111 (1983-09-01), Kelly
patent: 4443884 (1984-04-01), Swarz
patent: 4450556 (1984-05-01), Boleda et al.
Bookbinder Marc E.
Chin Stephen
NEC Corporation
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