| 摘要 |
Disclosed is an input stage circuit of a semiconductor device which is effective for preventing a reference voltage fluctuation. The input stage circuit of the semiconductor memory device includes: a reference voltage input pin connected to an external reference voltage terminal, wherein the reference voltage is used for determining a digital value; a reference voltage line for applying the reference voltage from the reference voltage input pin; a first drive voltage line for applying a first drive voltage into the semiconductor device; a second drive voltage line for applying a second drive voltage into the semiconductor device; a first coupler for coupling the reference voltage line with the first drive voltage line; and a second coupler for coupling the reference voltage line with the second drive voltage line.
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