| 摘要 |
PURPOSE:To suppress power noise and to reduce power consumption by outputting a high level through an N-channel MOS transistor(TR), outputting a low level through a P-channel MOS TR, and decreasing an output amplitude by a sum of threshold levels of the gate. CONSTITUTION:With an N-channel MOS TR 2 turned on, a high level is outputted and with a P-channel MOS TR 3 turned on, a low level is outputted. The low level is a voltage given from a gate potential (VG) + a gate threshold voltage (VTP) of the P-channel MOS TR 3, and the high level is a voltage given from the gate potential (VG) - a gate threshold voltage (VTN) of the N-channel MOS TR 2. Thus, even if the voltage VG is given as a ground potential or a power supply potential, the output amplitude of the final stage buffer is reduced by a level of VTN + VTP than heretofore. Thus, power noise is suppressed and the power consumption is reduced. |
