| 摘要 |
A repeater for a transmission system which can pass signals in either of two directions. Each direction has a signal detection circuit associated with it. Upon detection of the beginning of a signal, the signal detection circuit enables an associated driver to pass the signal in the appropriate direction and at the same time disables the other signal detection circuit so that a signal will pass in only one direction at a time. An end flag detecting circuit monitors for certain characteristics associated with the end of the signal, and upon detection causes both drivers to be disabled and both signal detection circuits to be reset so that they can again detect a signal passing in either direction.
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