| 摘要 |
PROBLEM TO BE SOLVED: To obtain an output buffer circuit that suppresses noise and increases an output speed. SOLUTION: This output buffer circuit is provided with a transfer gate 1, a transfer gate 2 whose drain is connected to a source of the transfer gate 1, a gate circuit 5 that is connected to the gates of the transfer gates 1, 2 via resistors 3, 4 respectively, receives an output signal by an input terminal and selectively gives this output signal to the gates of the transfer gates 1, 2, a data output line 6 connected to a connecting point between the transfer gates 1, 2, a common discharge line 12, a comparison detection circuit that compares a voltage level of (N-1) -th time output data stored in the data output line 6 with a voltage level of an N-th time output signal at the input terminal of the gate circuit 5 and generates a voltage level difference detection signal when the voltage levels differ from each other and a connection circuit that connects the data output line 6 to the common discharge line 12 when receiving the voltage level difference detection signal.
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