Automatic stream control device, control method and its circuit

First input end of NAND Schmidt trigger receives input signal. After being connected to charging delay circuit in series, second input end is connected to the first input end. Output end of the NAND Schmidt trigger is in use for outputting control signal. The invention also discloses method for cont...

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Bibliographic Details
Main Author ZHEN,BAI XU
Format Patent
LanguageEnglish
Published 29.08.2007
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
TELEPHONIC COMMUNICATION
TRANSMISSION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:First input end of NAND Schmidt trigger receives input signal. After being connected to charging delay circuit in series, second input end is connected to the first input end. Output end of the NAND Schmidt trigger is in use for outputting control signal. The invention also discloses method for controlling flow direction automatically including following steps: in idle period of transmission, input signal keeps high level, automatic flow direction control device (AFDCD) outputs low level; when the input signal inputs a low level, AFDCD outputs high level instantly; when the input signal jumps to high level from low level, AFDCD maintains high output level for momentary time; after the momentary time, AFDCD outputs low level. Baud rate of the disclosed AFDCD is 300-115200bps self-adapted. Based on input signal, the invention can control flow direction of RS-485/422 interface chip automatically.
Bibliography:Application Number: CN2007104949