公开(公告)号：US12278623B2

公开(公告)日：2025-04-15

申请号：US18332522

申请日：2023-06-09

Applicant: NXP B.V.

Inventor： Henricus Cornelis Johannes Büthker ,  Jyotirmoy Ghosh ,  Piotr Gibas ,  Edwin Schapendonk ,  Neha Goel ,  Namith Vishnu N

IPC: H03K17/22 ,  H03K3/037

Abstract: One example discloses a power on reset (POR) circuit, wherein a first circuit is configured to un-couple a power supply input from a resistor divider when the voltage on a second end of the capacitor is above a first circuit threshold; a second circuit configured to couple the second end of the capacitor to the power supply input when a voltage on at least one tap point of the resistor divider is above a second circuit threshold; wherein the comparator is coupled to at least one of the tap points, the reference potential, and a POR output; and wherein the comparator is configured to ramp-up a POR signal on the POR output when a voltage on the at least one of the tap points is greater than the comparator threshold.

公开(公告)号：US20240356543A1

公开(公告)日：2024-10-24

申请号：US18332522

申请日：2023-06-09

Applicant: NXP B.V.

Inventor： Henricus Cornelis Johannes Büthker ,  Jyotirmoy Ghosh ,  Piotr Gibas ,  Edwin Schapendonk ,  Neha Goel ,  Namith Vishnu N

IPC: H03K17/22 ,  H03K3/037

CPC classification number: H03K17/223 ,  H03K3/037

Abstract: One example discloses a power on reset (POR) circuit, wherein a first circuit is configured to un-couple a power supply input from a resistor divider when the voltage on a second end of the capacitor is above a first circuit threshold; a second circuit configured to couple the second end of the capacitor to the power supply input when a voltage on at least one tap point of the resistor divider is above a second circuit threshold; wherein the comparator is coupled to at least one of the tap points, the reference potential, and a POR output; and wherein the comparator is configured to ramp-up a POR signal on the POR output when a voltage on the at least one of the tap points is greater than the comparator threshold.