Simulation reading preprocessing circuit used for solid-state image sensor

The invention provides a simulation reading preprocessing circuit used for a solid-state image sensor. The simulation reading preprocessing circuit comprises a correlated dual-sampling programmable gain amplification level shifting single-slippage switch capacitor network, an operational amplifier, a correlated level shifting network and a control signal generator, wherein the correlated dual-sampling programmable gain amplification level shifting single-slippage switch capacitor network is used for achieving collecting and preprocessing of signals output by a solid-state image sensor, the operational amplifier is used for achieving correlated dual-sampling, level shifting and single-slippage functions and functions of a programmable gain amplifier according to the virtual short circuit and charge conservation principle of two input ends of the operational amplifier, the correlated level shifting network is used for improving the equivalent gain of the operational amplifier and outputting final preprocessed signals, and the control signal generator is used for providing control signals. According to the simulation reading preprocessing circuit used for the solid-state image sensor, the CDS, PGA, LS and S2D circuit sharing operational amplifier technology is adopted, and functions of the simulation reading preprocessing circuit are achieved through the single operational amplifier, a switch and a capacitor.