Schaltungen und Verfahren zum Zuverlässigen Hochfahren von Bandabstands-Referenzschaltungen

Details

Veröffentlichungs-Nr.

EP4793733

Anmeldetag

12. Februar 2025

Veröffentlichung

19. August 2026

Rechtsraum

EP

IPC

G05F3/30

Abstract

The invention relates to a method for obtaining reliable startup of a bandgap reference circuit, the bandgap reference circuit comprising a bandgap core with at least two branches, a feedback loop, and a startup circuit. The method comprises generating a startup stimulus with an initial magnitude sufficient to transition the circuit from an inactive state to an active state, controlling the decline of the startup stimulus by regulating its reduction progressively over time, and modifying local time constants of the bandgap reference circuit to prevent a condition in which the transient decline of a voltage across a first branch is faster than the transient decline of a voltage across a second branch. By doing so, the voltages across the branches of the bandgap core converge to a target operating point, ensuring a reliable startup of the bandgap reference circuit.

Anmelder

Firma

EM Microelectronic-Marin SA

Land

🇨🇭 Schweiz

Fachgebiete