| 摘要 |
PROBLEM TO BE SOLVED: To provide an analog switch circuit that, when turned on, is unlikely to exceed a withstanding voltage and, when turned off, easily holds a reliable off state, upon the input of a large signal.SOLUTION: The analog switch circuit includes: a control terminal CNTL; an input terminal IN and an output terminal OUT; a transistor Mhaving a bulk terminal B; a first impedance element Rconnected between a gate terminal G of the transistor Mand the control terminal CNTL, and having a higher impedance than a parasitic capacitance Cof the transistor Mbetween the gate terminal G and a source terminal S or a parasitic capacitance Cbetween the gate terminal G and a drain terminal D; and second and third impedance elements Z, Zdisposed between the source S and the bulk terminal B of the transistor Mand between the drain D and the bulk terminal B, and having a lower impedance than a parasitic capacitance Cof the transistor Mbetween the bulk terminal B and the source terminal S or a parasitic capacitance Cbetween the bulk terminal B and the drain terminal D. |
