Asynchronous transmission system for binary-coded information

Details Asynchronous transmission system for binary-coded information Asynchronous transmission system for binary-coded information

1980-11-26

1982-08-31

Ng, Jin F.

Pulse or digital communications

Repeaters

Testing

375 37, 455608, 307234, 328112, H03K 526

Patent

active

043476171

ABSTRACT:
An asynchronous transmission system for binary-coded information is disclosed. According to this system, in a transmitting terminal (A), when successive data of the same code in a set of asynchronous data lasts for a predetermined period of time (T.sub.1), a refresh pulse, the polarity of which is opposite to that of the successive data, is added to a transmission signal. However, the addition of such a refresh pulse to the transmission signal is inhibited for a predetermined period of time (T.sub.2) to allow for a change of data. In a receiving terminal (B), a pulse, the width of which is larger or equal to a minimum period of data, and a pulse, the width of which is smaller than or equal to a pulse-width (T.sub.0) of a refresh pulse, can be discriminated and removed by a pulse-width discrimination circuit. As a result, the refresh pulse is not present in the output signal of the pulse-width discrimination circuit. Thus, the original asynchronous data is restored.

REFERENCES:
patent: 3993954 (1976-11-01), Sugai
patent: 4027152 (1977-05-01), Brown et al.

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