公开(公告)号：US20220137659A1

公开(公告)日：2022-05-05

申请号：US17087003

申请日：2020-11-02

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Luis Ariel MALAVE-PEREZ ,  Angelo William PEREIRA

IPC: G05F3/26

Abstract: A current mirror circuit includes a first current mirror transistor, a second current mirror transistor, and a bias circuit. The first current mirror transistor includes a gate and a drain. The second current mirror transistor includes a gate coupled to the gate of the first current mirror transistor. The first current mirror transistor and the second current mirror transistor are low threshold voltage transistors. The bias circuit is coupled to the gate and the drain of the first current mirror transistor. The bias circuit is configured to bias the first current mirror transistor to operate in a saturation mode when a threshold voltage of the first current mirror transistor is a negative voltage.

公开(公告)号：US20210091562A1

公开(公告)日：2021-03-25

申请号：US16843324

申请日：2020-04-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kae Ann WONG ,  Siang Tong TAN ,  Luis Ariel MALAVE-PEREZ ,  Mikko Topi LOIKKANEN ,  Mitsuyori SAITO ,  Angelo William PEREIRA

IPC: H02H9/04 ,  H02H1/00

Abstract: A system includes a power supply source and a power control circuit coupled to the power supply source, in which the power control circuit includes a pass field-effect transistor (FET). The system also includes a short-to-ground protection circuit coupled to an output of the pass FET. The short-to-ground protection circuit includes a sense circuit configured to detect when a magnitude and a change rate of a voltage drop at the output of the pass FET is greater than respective thresholds. The short-to-ground protection circuit also includes a control node at the output of the sense circuit. The sense circuit is configured to induce a control current at the control node in response to the magnitude and the change rate of a voltage drop at the output of the pass FET being greater than respective thresholds. The control current is used to turn off the pass FET.