| 摘要 |
An element can be prevented from being damaged even when a high level signal is input to an integrated circuit having a variable capacitance element whose capacitance is variable by digital signal control. There is provided an integrated circuit including b sub-circuits (b is an integer equal to or greater than 1) that are connected in series between a first terminal and a second terminal and have capacitance 2b-1 times larger than predetermined unit capacitance. The b-th sub-circuit includes 2b-1 configurations, which are connected in parallel, each including at least two capacitors connected in series and at least two stacked switch elements. At least the two stacked switch elements are operated to all switched for each sub-circuit, and at least one switch element of at least the two stacked switch elements is provided between at least the two capacitors. |
