Analog-to-digital converter system

The invention discloses an analog-to-digital converter system, and relates to the technical field of analog-to-digital converters. The circuit comprises a sampling and holding circuit module and a quantizer connected with the sampling and holding circuit module. The sampling and holding circuit module is used for sampling an input signal and holding and transmitting the signal; and the quantizer is used for quantizing the signal sampled by the sampling and holding circuit module into a digital signal. The structure of the operational amplifier is improved, the GBW of the amplifier is greatly improved while in-band gain is guaranteed through the multi-stage amplification and feed-forward access technology, the phase margin and gain margin of a loop are guaranteed through modeling and circuit model simulation, the detuning of a quantizer is corrected through calibration, dynamic latch is introduced, and therefore the reliability of the amplifier is improved. Therefore, the speed of the quantizer is improved. 本发