公开(公告)号：US11183977B2

公开(公告)日：2021-11-23

申请号：US16264311

申请日：2019-01-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tawen Mei ,  Jiun Heng Goh ,  Robert Gregory Blattner

IPC: H03F3/38 ,  H03F3/04 ,  H03K17/687 ,  H03F3/217 ,  H03F1/02

Abstract: A device includes a first amplifier and a second amplifier. The first amplifier includes an inverting input configured to be coupled to a feedback node of an output of a power converter, a first non-inverting input configured to couple to a first voltage node, a second non-inverting input, and an output. The second amplifier includes an inverting input coupled to the output of the first amplifier, a non-inverting input coupled to a second voltage node, and an output. The device also includes a first transistor coupled to the output of the first amplifier and having a control terminal coupled to the output of the second amplifier, a capacitor coupled to a ground node and to the second non-inverting input of the first amplifier, and a current node coupled to the capacitor.