| 摘要 |
An output buffer circuit in a multi-power system operating at a high power supply voltage and a low power supply voltage includes a pre-driver, and a main driver. The pre-driver performs a differential switching operation on first and second differential input signals to output first and second differential output signals. The main driver performs a differential switching operation on the DC-eliminated and level-shifted first and second differential output signals to output third and fourth differential output signals. The main driver includes a differential switching circuit including first and second NMOS transistors, and performs a differential switching operation on the DC-eliminated and level-shifted first and second differential output signals to output the third and fourth differential output signals, and an equalizer coupled between source electrodes of the first and second NMOS transistors, and controls a bandwidth of the third and fourth differential output signals.
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