公开(公告)号：US09671805B2

公开(公告)日：2017-06-06

申请号：US14632345

申请日：2015-02-26

Applicant: Dialog Semiconductor GmbH

Inventor： Stephan Drebinger ,  Roberto Curra

IPC: G05F1/575 ,  H03F3/34 ,  H03F3/45

CPC classification number: G05F1/575 ,  H03F3/34 ,  H03F3/45183 ,  H03F2200/297 ,  H03F2203/45301 ,  H03F2203/45674

Abstract: Amplifiers, notably multi-stage amplifiers, such as linear regulators (e.g. low-dropout regulators) configured to provide a constant output voltage subject to load transients are presented. An amplifier is described, which comprises a first amplification stage configured to provide an intermediate voltage, based on an outer feedback voltage and based on a reference voltage. Furthermore, the amplifier comprises an output stage configured to provide a load current at an output voltage based on the intermediate voltage. In addition, the amplifier comprises an outer feedback circuit configured to derive the outer feedback voltage from the output voltage. The output stage comprises a buffer configured to provide a drive voltage based on the intermediate voltage and based on an inner feedback voltage derived from the output voltage. The buffer comprises a pass device which is configured to provide the load current at the output voltage based on the drive voltage.

公开(公告)号：US20150355653A1

公开(公告)日：2015-12-10

申请号：US14632345

申请日：2015-02-26

Applicant: Dialog Semiconductor GmbH

Inventor： Stephan Drebinger ,  Roberto Curra

IPC: G05F1/575

CPC classification number: G05F1/575 ,  H03F3/34 ,  H03F3/45183 ,  H03F2200/297 ,  H03F2203/45301 ,  H03F2203/45674

Abstract: Amplifiers, notably multi-stage amplifiers, such as linear regulators (e.g. low-dropout regulators) configured to provide a constant output voltage subject to load transients are presented. An amplifier is described, which comprises a first amplification stage configured to provide an intermediate voltage, based on an outer feedback voltage and based on a reference voltage. Furthermore, the amplifier comprises an output stage configured to provide a load current at an output voltage based on the intermediate voltage. In addition, the amplifier comprises an outer feedback circuit configured to derive the outer feedback voltage from the output voltage. The output stage comprises a buffer configured to provide a drive voltage based on the intermediate voltage and based on an inner feedback voltage derived from the output voltage. The buffer comprises a pass device which is configured to provide the load current at the output voltage based on the drive voltage.

Abstract translation: 放大器，特别是多级放大器，例如被配置为提供经受负载瞬变的恒定输出电压的线性稳压器（例如低压差稳压器）。 描述了放大器，其包括第一放大级，其被配置为基于外部反馈电压并且基于参考电压提供中间电压。 此外，放大器包括输出级，其被配置为基于中间电压在输出电压下提供负载电流。 此外，放大器包括被配置为从输出电压导出外部反馈电压的外部反馈电路。 输出级包括被配置为基于中间电压提供驱动电压并基于从输出电压导出的内部反馈电压的缓冲器。 缓冲器包括通过装置，其被配置为基于驱动电压在输出电压下提供负载电流。