DC voltage buffer circuit

The utility model discloses a DC voltage buffer circuit, follow the unit including input unit, feedback Unit, comparing element and voltage, input unit converts input voltage to corresponding current signal, right the current signal sampling obtains first voltage, feedback Unit converts the A third voltage of comparing element output corresponding current signal and sampling to, obtains second voltage, comparing element carries out first voltage and second voltage the comparison and exports A third voltage and follow the unit for voltage, voltage is followed the unit and is carried out obtaining behind the power amplification output voltage to A third voltage, voltage -current conversion through input unit keeps apart input voltage, the comparison feedback through feedback Unit and comparing element to be in order to obtain dynamic balance, has constituted the isolating amplifier circuit who has linear transfer characteristic and has realized that the linear of voltage keeps apart and be anti -interference, a