| 摘要 |
PURPOSE:To eliminate the effect of offset by connecting output side terminal of amplifier of a negative feedback capacitor to a reference voltage power source and have a short circuit between the negative polarity input terminal and the output of the amplifier. CONSTITUTION:An input signal vi has a flat part, i.e., a standard for DC restoration in a flyback time. The switches 6 and 10 are opened with a switch 7 short- circuited respectively during a period excepting a part of a flyback time. Thus an amplifying circuit of negative polarity is constituted. When the switches 7 and 10 are opened and short-circuited respectively. Then the switch 6 short-circuited respectively during a flyback time. Therefore a capacitor 9 is charged with the reference voltage and the offset voltage. Then the switches 7 and 10 are short-circuited after the switch 6 is opened. An output signal vo is inverted into the signal vi with the reference voltage ET defined as a start point when a flyback time elapses. |
