| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor device suppressing an increase in an area of an element in the device having an analog switch circuit, a capacitance element and a noise cancelling circuit for reducing a switching noise. SOLUTION: The noise cancelling circuit has a noise cancelling element 22 having a gate electrode F formed on an N-type semiconductor layer and an adjacent inter-element isolating region L via a gate insulting film 32 and connected to a gate electrode C of an N-ch MOSFET 4 and a P-type semiconductor layer connected to an output wire D. The cancelling circuit further has a noise cancelling element 24 having a gate electrode E formed on a P-type semiconductor layer and an adjacent inter-element isolating region L via a gate insulating film 32 and connected to a gate electrode B of a P-ch MOSFET 2 and an N-type semiconductor layer connected to an output wire D.
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