Reference voltage source with high power supply rejection ratio (PSRR)

The invention belongs to the technical field of integrated circuit and relates to a reference voltage source with high power supply rejection ratio (PSRR). The reference voltage source is characterized in that a new train of thought is put forward to improve the PSRR of different frequencies, the PSRR is improved by introducing a self-biased cascade structure as the load to shield power supply change effect when in the medium and low frequency, and the purpose of improving the PSRR is achieved by introducing capacitance filtering effect in the high frequency. The reference voltage source has the advantages that the full-band PSRR is improved, reference voltage output through the voltage reference circuit is ensured to be precise, and stability of the output reference voltage of the voltage reference circuit is improved.