| 摘要 |
An output circuit group comprises at least one first output circuit that outputs a pair of differential signals, the first output circuit including a first reversing circuit operated by applying a first power supply potential and a second power supply potential to reverse a first driving signal so as to output a first reverse driving signal, a first signal level converting circuit operated by applying the first power supply potential and a third power supply potential to convert the first driving signal to a signal having a predetermined level to output, a second signal level converting circuit operated by applying the first and the third power supply potentials to convert the first reverse driving signal to a signal having a predetermined level to output, a first differential circuit operated by applying the first and the third power supply potentials to output a signal having a first polarity corresponding to a difference between the signal output from the first signal level converting circuit and the signal output from the second signal level converting circuit, a second differential circuit operated by applying the first and the third power supply potentials to output a signal having a second polarity that is opposite to the first polarity and corresponding to a difference between the signal output from the second signal level converting circuit and the signal output from the first signal level converting circuit, a first output signal generating circuit operated by applying the first and the third power supply potentials to generate a first output signal based on the signal having the first polarity output from the first differential circuit, and a second output signal generating circuit operated by applying the first and the third power supply potentials to generate a second output signal based on the signal having the second polarity output from the second differential circuit, the first and the second output signals being included in the differential signals; and at least one second output circuit that outputs a single forward or reverse signal, the second output circuit including a second reversing circuit operated by applying the first and the second power supply potentials to reverse a second driving signal so as to output a second reverse driving signal, a third signal level converting circuit operated by applying the first and the third power supply potentials to convert the second driving signal to a signal having a predetermined level to output, a fourth signal level converting circuit operated by applying the first and the third power supply potentials to convert the second reverse driving signal to a signal having a predetermined level to output, a third differential circuit operated by applying the first and the third power supply potentials to output a signal having a first polarity corresponding to a difference between the signal output from the third signal level converting circuit and the signal output from the fourth signal level converting circuit, a loading circuit connected to an output terminal of each of the third and the fourth signal level converting circuits to have a load capacitance approximately equal to a load capacitance of the third differential circuit, and a third output signal generating circuit operated by applying the first and the third power supply potentials to generate the forward or reverse signal based on the signal having the first polarity output from the third differential circuit.
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