| 摘要 |
PROBLEM TO BE SOLVED: To make conversion to an output signal with a diversified range width by a small number of switches by adjusting the gain of a signal where an input signal is superposed on a reference voltage using a reduction rate setting means and an enlargement rate setting means. SOLUTION: A reference voltage is set by a reference voltage generation means 83 and is overlapped with an input signal 100 and the gain of the overlapped signal is adjusted by a reduction rate setting means 84 and an enlargement rate setting means 85, thus making conversion to the output signal of a diversified range width with a small number of switch circuits. Each two switch circuit are illustrated as a switch circuit for constituting the reference voltage generation means 83, the reduction rate setting means 84, and an enlargement rate setting means 85. However, the number of switch circuits may be one or at least three. Also, the reference voltage generation means 83, the reduction rate setting means 84, and the enlargement rate setting means 85 can be combined properly depending on the number of output range widths to be converted. |
