Discrete low-power-consumption integrator for switching delta-sigma modulator based on operational amplifier

The invention relates to a discrete low-power-consumption integrator for a delta-sigma modulator, which belongs to the field of integrated circuits, and comprises a first feedback module, a second feedback module, an integral amplifier module and a signal input module, the integrator module comprises a first operational amplifier and a second operational amplifier, and the input end of the integrator module is connected with the input end of the first operational amplifier; the signal input module is connected with the first and second feedback modules. And the outputs of the first operational amplifier and the second operational amplifier are respectively connected to the output of the integrator. The first feedback module and the second feedback module are controlled by a result generated by the post-stage quantizer, and the signal input module and the integrator module are controlled by clock input CLK1, CLK2, CLK1S and CLK2S of the post-stage quantizer. The first-stage integrator of the delta-sigma ADC is