| 摘要 |
PROBLEM TO BE SOLVED: To extract an information signal with accuracy even when a reception signal is input in a low amplitude level. SOLUTION: By setting the ratio between the gate width Wp of a p-MOS 18 and the gate width Wn of a n-MOS 20 between 1:0.9 to 1:1.1, the capacity between the gate terminal 42 and the source terminal 22 of the p-MOS 18 is set approximately equal to the capacity between the gate terminal 44 and the source terminal 24 of the n-MOS 20. Because the component of a p-channel control signal leaked through the inter-terminal capacity between the gate terminal 42 and the source terminal 22 of the p-MOS 18 is canceled by the component of a n-channel control signal leaked through the inter-terminal capacity between the gate terminal 44 and the source terminal 24 of the n-MOS 20, it becomes possible to suppress generation of an error component in a signal output terminal 12 caused by the leak component of the two control signals. COPYRIGHT: (C)2004,JPO
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