| 摘要 |
A switched-capacitor auto-zero integrator includes and integrator circuit and a correction circuit. The integrator circuit may be any circuit including an operational amplifier having an input line and an output line, an input capacitor coupled to be charged by an Input voltage, an integrating capacitor coupled to the output line, and at least one integrating switch operable during an integrating time interval to connect the input capacitor to the integrating capacitor such that the integrating capacitor is charged to compensate for charge of the input capacitor. The correction circuit includes an offset capacitor coupled to the input line and at least one correction switch operable in an auto-zero sub-interval: and a correction sub-interval. The sub-intervals occur only during the integrating interval such that the offset capacitor is charged by an offset voltage and a gain error voltage of the operational amplifier during the auto-zero sub-interval and the offset capacitor is connected to a summing node between the input capacitor and the integrating capacitor during the correction sub-interval.
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