| 摘要 |
An interface circuit includes first and second current mirrors, first and second input circuits, and a reference setting unit. Each of the first and second current mirror circuit has a current input terminal and a current output terminal. The first input circuit has a first transistor having a gate to which an input signal is input and a drain connected to the current output terminal of the first current mirror circuit. The second input circuit has a second transistor having a gate to which a predetermined reference voltage is input and a drain connected to the current output terminal of the second current mirror circuit. The reference setting unit is connected to the current input terminal to set a current amount flowing to the current output terminal as a logic determination level of the first transistor. A method of setting a determination level for the interface circuit is also disclosed.
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