公开(公告)号：US09954496B2

公开(公告)日：2018-04-24

申请号：US15385200

申请日：2016-12-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Steven G. Brantley ,  Bharath Karthik Vasan ,  John Lawrence Caldwell

IPC: H03F1/14 ,  H03F1/30 ,  H03F3/187 ,  H03G1/00 ,  H03G3/30 ,  H03F3/30 ,  H03F3/45

CPC classification number: H03F1/305 ,  H03F3/187 ,  H03F3/3069 ,  H03F3/45085 ,  H03F3/45596 ,  H03F2200/03 ,  H03F2200/375 ,  H03G1/0023 ,  H03G1/0088 ,  H03G3/3005 ,  H03G3/348

Abstract: At least some embodiments are directed to a system comprising an amplifier containing a first bias current source and configured to provide an output voltage at a node, a gain stage coupled to the node and comprising a second bias current source, and a buffer stage coupled to the node and comprising third and fourth bias current sources and an additional set of bias current sources, the third and fourth bias current sources are able to activate output transistors that are configured to increase current provided to a load. The system also comprises a controller configured to activate the first bias current source, to activate the second bias current source after the first bias current source is activated, to activate the bias current sources in the set after the first bias current source is activated, and to activate the third and fourth bias current sources after the first and second bias current sources are activated and after the bias current sources in the set are activated.