Supply voltage proportionality monitoring in a system-on-chip (SOC)

US11977664B2 · kind B2 · utility

Assignee

• NXP USA, Inc. · US

Inventors

• Markus Regner · Munich, DE
• Hubert M. Bode · Haar, DE
• Stefan Doll · Obermoschel, DE

Key dates

• Filing date: Nov 19, 2021
• Grant date: May 7, 2024
• Expiry date: Jan 30, 2042

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03K19/17768
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A System-on-Chip (SoC) includes first and second voltage supply pins configured to receive first and second supply voltages, respectively, a first supply path beginning at the first supply pin, and a supply proportion checker. The first supply path includes a first plurality of voltage supply nodes and a supply switch coupled between adjacent voltage supply nodes, wherein each node is configured to provide a corresponding internal voltage supply to a corresponding portion of the SoC. The supply proportion checker is coupled to receive the corresponding internal voltage supply from each voltage supply node, and configured to determine whether a first internal voltage supply supplied by a first supply node of the first plurality of nodes has a legitimate proportion to a second internal voltage supply supplied by a second supply node of the first plurality of nodes, wherein the legitimacy is checked using only resistors which do not require trimming.