公开(公告)号：US09323269B1

公开(公告)日：2016-04-26

申请号：US14323067

申请日：2014-07-03

Applicant: Marvell International Ltd.

Inventor： Chih-Kai Kang ,  Wyant Chan ,  Pierte Roo

IPC: G05F3/16 ,  G05F3/20 ,  H02H7/00 ,  H02H9/00 ,  G05F3/02

CPC classification number: G05F3/02 ,  G05F1/467 ,  G05F1/468 ,  H02H9/04

Abstract: A voltage regulator includes a supply filter, a bias filter, and first and second circuits. The supply filter is configured to operate from a supply voltage, and to generate a filtered supply voltage at a first node. The supply filter includes a transistor and a capacitor. First and control terminals of the transistor receive the supply voltage. A second terminal of the transistor and a first terminal of the capacitor are connected to the first node. The first circuit is configured to operate from both the supply voltage and the filtered supply voltage, and to generate a second reference voltage based on an input reference voltage. The bias filter is configured to generate a filtered second reference voltage based on the second reference voltage. The second circuit is configured to operate from the filtered supply voltage, and to generate a regulated voltage based on the filtered second reference voltage.

Abstract translation: 电压调节器包括电源滤波器，偏置滤波器以及第一和第二电路。 电源滤波器被配置为从电源电压操作，并且在第一节点处产生经滤波的电源电压。 电源滤波器包括晶体管和电容器。 晶体管的第一个和控制端接收电源电压。 晶体管的第二端子和电容器的第一端子连接到第一节点。 第一电路被配置为从电源电压和滤波的电源电压两者操作，并且基于输入参考电压产生第二参考电压。 偏置滤波器被配置为基于第二参考电压产生滤波的第二参考电压。 第二电路被配置为根据滤波的电源电压进行工作，并且基于滤波的第二参考电压产生调节电压。