Readout circuit, solid-state imaging apparatus, and method for driving readout circuit

摘要

A readout circuit includes: an amplifier (408); and offset controllers (415 and 416) configured to set an output offset voltage of the amplifier, wherein the readout circuit operates in first and second modes, in the first mode, a first voltage, and thereafter a second voltage lower than the first voltage, are input into the amplifier, in the second mode, a third voltage, and thereafter a fourth voltage higher than the third voltage, are input into the amplifier, and the offset controller switches the output offset voltage of the amplifier, between the first and second modes.

主权项

1. A readout circuit comprising:
an amplifier; an input capacitor configured to input a signal by capacitive coupling to an input terminal of the amplifier; an initializing switch configured to short circuit between the input terminal and an output terminal of the amplifier; a feedback capacitor arranged between the input terminal and the output terminal of the amplifier; and an offset controller configured to set an output offset voltage of the amplifier, wherein the readout circuit operates in first and second modes, in the first mode, a first voltage is input to the amplifier through the input capacitor, and thereafter a second voltage lower than the first voltage is input to the amplifier through the input capacitor, in the second mode, a third voltage is input to the amplifier through the input capacitor, and thereafter a fourth voltage higher than the third voltage is input to the amplifier through the input capacitor, and in at least one of the first mode and the second mode, after the initializing switch is turned on, the offset controller applies the output offset voltage to the output terminal of the amplifier, whereby the output offset voltage of the amplifier is set to different values between the first and second modes.