| 摘要 |
PURPOSE:To prevent an error due to electric charge charging and to prevent an error due to initialization by specifying the opening/ closure timing of an initialization switch. CONSTITUTION:Respective sample holding circuits H1-H10 are each constituted by connecting an input-side switch SW2, a capacitance e11, a 1st-stage amplifier AMP1, a capacitance C21, and a 2nd-stage amplifier AMP2 in series. The input and output of the AMPs 1 and 2 are connected by feedback capacitances C12 and C22 and also connected by 1st and 2nd initialization switches SW3 and SW6 so that they can be opened and closed; and the amplifier of the arithmetic circuit which processes the output is connected by a 3rd initialization switch(SW 7) so that it can be opened and closed. Then the 2nd or 3rd initialization switch SW6 (SW7) is closed a sufficient time after the 1st initialization switch SW3 is opened, and the 1st initialization switch SW3 is closed after the 2nd or 3rd initialization switch SW6 (SW7) is opened. |
