| 摘要 |
PROBLEM TO BE SOLVED: To provide an output buffer circuit having a slew rate adjusting circuit which is not influenced by an external resistor. SOLUTION: Since the output of the circuit can be changed while controlling the potential of a pull-up resistor or pull-down resistor by applying a bias to the gate of an output transistor other than an output transistor changing at a constant slew rate to turn it on, out of a PMOS transistor 10 and an NMOS transistor 11 constituting output transistors of the slew rate adjusting circuit, the output can be changed from its an "H" level to an "L" level and from the "L" level to the "H" level at the constant slew rate, even if the pull-up resistor or the pull-down resistor is connected. COPYRIGHT: (C)2006,JPO&NCIPI
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