Sampling circuit and amplification type solid-state imaging device employing the circuit

摘要

A sampling circuit includes a first sample hold means having a sample hold switch whose one terminal receives an input signal and a sample hold capacitor whose one terminal is connected to the other terminal of the sample hold switch, an amplifier circuit whose input terminal is connected to the other terminal of the sample hold switch and a horizontal selection switch whose one terminal is connected to an output terminal of the amplifier circuit and the other terminal of which is connected to a horizontal signal line. The output terminal of the amplifier circuit is connected to one terminal of a conduction control switch, and a first constant current load is connected to the other terminal of the conduction control switch. The conduction control switch is turned on when the sample hold switch is on and the horizontal selection switch is off.