| 摘要 |
The logic circuit prevents the floating of the output line when all outputs are tri-state, and does not have a pull-up resistor. The circuit comprises a number of OR gates (G41-G4n) for logically OR-ing the control signal and the input signal, an AND gate (G4a) for logically AND-ing all outputs of a number of OR gates, and a buffer (G40) connecting with the output of the AND gate.
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