| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an interactive buffer capable of removing a whisker, and to provide a selector using the interactive buffer. <P>SOLUTION: A first input buffer 10 compares a potential V1 of a first terminal P1 with a first threshold voltage Vth1. A first output buffer 18 fixes a potential V2 of a second terminal P2 to a predetermined first voltage VL1 when a first signal S1' is at a high level, and output thereof becomes high impedance when the first signal is at a low level. A second input buffer 26 compares the potential V2 of the second terminal P2 with a second threshold voltage Vth2 lower than the first voltage VL1. A second output buffer 34 fixes the potential V1 of the first terminal P1 to a second voltage VL2 lower than the first threshold voltage Vth1 when a second signal S2' is at a low level, and output thereof becomes high impedance when the second signal is at a high level. When a state where the second signal S2' is at the high level is continued as long as or longer than a predetermined first period τ1, a mask circuit 40 fixes a voltage of a first filter 12 at a low level and sets the output of the first output buffer 18 to high impedance. <P>COPYRIGHT: (C)2009,JPO&INPIT |
