| 摘要 |
The present document relates to amplifiers, notably multi-stage amplifiers, such as linear regulators or linear voltage regulators (e.g. low-dropout regulators) configured to provide a constant output voltage subject to load transients. An amplifier (300) is described. The amplifier (300) comprises a first amplification stage (302) configured to provide an intermediate voltage, based on an outer feedback voltage (107) and based on a reference voltage (108). Furthermore, the amplifier (300) comprises an output stage (301) configured to provide a load current at an output voltage (305) based on the intermediate voltage (528). In addition, the amplifier (300) comprises an outer feedback circuit (104) configured to derive the outer feedback voltage (107) from the output voltage (305). The output stage (301) comprises a buffer (301) configured to provide a drive voltage based on the intermediate voltage (528) and based on an inner feedback voltage derived from the output voltage (305). The buffer (301) comprises a pass device (201) which is configured to provide the load current (527) at the output voltage (305) based on the drive voltage. |
