公开(公告)号：US20160085250A1

公开(公告)日：2016-03-24

申请号：US14381186

申请日：2014-01-10

Applicant: SILICON IMAGE, INC.

Inventor： Kexin Luo ,  Fangqing CHU ,  Yu Shen ,  Zhi Wu ,  Inyeol Lee

IPC: G05F1/46 ,  G05F1/56

CPC classification number: G05F1/468 ,  G05F1/56

Abstract: Embodiments of the invention are generally directed to a linear regulator with improved power supply ripple rejection. An embodiment of an apparatus includes an linear regulator to receive a system power supply and to generate a regulated power supply; a first voltage reference generator to generate a first voltage reference for the linear regulator; a second voltage reference generator to generate a second voltage reference for the linear regulator; and a voltage reference and power switcher. In some embodiments, the voltage reference and power switcher is to switch a voltage reference for the linear regulator from the first voltage reference to the second voltage reference and is to switch a part of a power supply for the linear regulator from the system power supply to the regulated power supply.

Abstract translation: 本发明的实施例通常涉及具有改进的电源纹波抑制的线性调节器。 装置的实施例包括线性调节器，用于接收系统电源并产生稳压电源; 第一参考电压发生器，用于产生线性调节器的第一电压基准; 第二参考发生器，用于为所述线性调节器产生第二参考电压; 以及电压基准和电源切换器。 在一些实施例中，电压参考和功率切换器将线性调节器的电压参​​考值从第一参考电压切换到第二参考电压，并将用于线性稳压器的电源的一部分从系统电源切换到 稳压电源。