| 摘要 |
PURPOSE: A source follower device for a high speed operation is provided, which enables a high speed operation by removing a slew rate limit by controlling a drain current actively by forming a negative feedback loop. CONSTITUTION: The first transistor(M1) receives an input voltage through a gate port, and the second transistor(M2) receives a bias voltage through a gate port. The third and the fourth transistor(M3,M4) are connected between a power supply voltage(VDD) and drain ports of the first and the second transistor respectively and are constituted in a current mirror method. The fifth and the sixth transistor(M5,M6) are connected between source ports of the first and the second transistor and a ground port(Vss) and are constituted in a current mirror method. A load capacitor(CL) is connected between the ground port and a common contact point of the first and the fifth transistor. An output voltage is output from the common contact point of the first and the fifth transistor.
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