High-precision multiple-output voltage buffer

The invention relates to the technical field of integrated circuits, in particular to a high-precision multiple-output voltage buffer. According to the high-precision multiple-output voltage buffer, a conventional method is used for enabling the inverting input end and the output end of an operational amplifier to be connected, a high-precision voltage is output, then a drain-source voltage VDS which works on an NMOS tube in a linear area and a gate-to-source voltage VGS which works on an NMOS tube in a saturation area are added on the basis of the output voltage, and then a gate-to-source voltage VGS which works on the NMOS tube in the saturation area and a drain-source voltage VDS which works on the NMOS tube of the linear area are subtracted. Meanwhile, the drain-source voltages which work on the NMOS tubes in the linear area and the saturation area are made equal, thus the added VGS and VDS and the subtracted VGS and VDS can be offset, and another high-precision voltage is output. According to the high-precision multiple-output voltage buffer, one operational amplifier is used for achieving the purpose that multiple high-precision voltages are output. The high-precision multiple-output voltage buffer is particularly suitable for voltage buffers.