公开(公告)号：US07548114B2

公开(公告)日：2009-06-16

申请号：US11907065

申请日：2007-10-09

Applicant: Chung-Wei Yu

Inventor： Chung-Wei Yu

IPC: H03F3/26

CPC classification number: H03F3/3023 ,  H03F3/45192 ,  H03F3/45475 ,  H03F2200/78 ,  H03F2203/45248 ,  H03F2203/45352 ,  H03F2203/45366 ,  H03F2203/45646

Abstract: The present invention discloses an apparatus for slew rate enhancement of an operational amplifier, wherein an auxiliary control device and an auxiliary output device are added to the output stage of an operational amplifier. The auxiliary control device mirrors the current of the output stage and then compares the mirrored current with a reference current to generate an auxiliary push/pull control signal, which is used to control the auxiliary output device. When the output signal is different from the input signal, the auxiliary control device turns on the auxiliary output device to provide an auxiliary output current for the output terminal. When the output signal is equal to the input signal, the auxiliary output device is turned off.

Abstract translation: 本发明公开了一种用于运算放大器的转换速率增强的装置，其中辅助控制装置和辅助输出装置被添加到运算放大器的输出级。 辅助控制装置反映输出级的电流，然后将镜像电流与参考电流进行比较，以产生用于控制辅助输出装置的辅助推/拉控制信号。 当输出信号与输入信号不同时，辅助控制装置打开辅助输出装置，为输出端提供辅助输出电流。 当输出信号等于输入信号时，辅助输出设备关闭。

公开(公告)号：US20090091388A1

公开(公告)日：2009-04-09

申请号：US11907065

申请日：2007-10-09

Applicant: Chung-Wei Yu

Inventor： Chung-Wei Yu

IPC: H03F3/45 ,  H03F3/26

CPC classification number: H03F3/3023 ,  H03F3/45192 ,  H03F3/45475 ,  H03F2200/78 ,  H03F2203/45248 ,  H03F2203/45352 ,  H03F2203/45366 ,  H03F2203/45646

Abstract: The present invention discloses an apparatus for slew rate enhancement of an operational amplifier, wherein an auxiliary control device and an auxiliary output device are added to the output stage of an operational amplifier. The auxiliary control device mirrors the current of the output stage and then compares the mirrored current with a reference current to generate an auxiliary push/pull control signal, which is used to control the auxiliary output device. When the output signal is different from the input signal, the auxiliary control device turns on the auxiliary output device to provide an auxiliary output current for the output terminal. When the output signal is equal to the input signal, the auxiliary output device is turned off.