Patent ID: 8744382

Claim:
A fast tracking power supply device, comprising: a basic voltage output unit comprising a level providing unit configured to provide one or more level outputs and a level switching unit configured to switch and select the level output in the level providing unit according to a received first control signal and output a basic voltage; and a compensation voltage output unit comprising a basic current output unit and a linear amplifier; wherein the linear amplifier is connected in parallel with the basic current output unit and is connected in series with the basic voltage output unit, wherein the basic current output unit comprises a current source providing unit configured to provide one or more constant current sources and a current switching unit configured to switch and select the constant current source in the current source providing unit according to a received second control signal and output a basic current, wherein the linear amplifier is configured to output a compensation current and output a compensation voltage according to a third control signal, wherein the compensation current is configured to compensate the basic current, and wherein the compensation voltage is configured to compensate the basic voltage.