| 摘要 |
A voltage regulator (10) has: an error-amplifier stage (2) with a first input (2a) and a second input (2b) input, which receive a reference voltage (V i ) and a feedback voltage (V R ), respectively, and an output (2c); an output amplifier stage (4), which has an input (4a) coupled to the output (2c) of the error-amplifier stage (2) and supplies an output voltage (V OUT ) related to the reference voltage (V i ) by an amplification factor (±); and a feedback stage (6), which generates the feedback voltage (V R ) as a function of the output voltage (V OUT ) for implementing a first feedback loop. Furthermore, a compensation stage (12), which implements a derivator, is set between the output and the input of the output amplifier stage (4) for implementing a second feedback loop and causing, in response to a variation of the output voltage, a corresponding variation of a biasing voltage (V G ) at input to the output amplifier stage; the compensation stage has a coupling capacitor (C F ) and a driving module (16). |
