Patent · US Active

Voltage reference generation with compensation for temperature variation

US11774999B2 · kind B2 · utility

0Cited by

37References

12Claims

0Family size

Assignee

NXP USA, Inc. · US

Inventors

Yuan Gao · San Diego, US
Simon Brule · Toulouse, FR
Estelle Huynh · Toulouse, FR

Key dates

Filing date	Sep 30, 2020
Grant date	Oct 3, 2023
Priority date	—
Expiry date	Jul 26, 2041

Classification

Technology area (CPC G)Physics
CPC primaryG05F3/30
WIPO fieldControl
WIPO sectorInstruments

Abstract

In a particular example, a low drift voltage reference system includes a Zener diode circuit, a voltage reduction circuit, and a proportional-to-absolute temperature (PTAT) circuit. The Zener diode circuit, which is coupled between a first supply terminal (e.g., VDD) and a second supply terminal (e.g., common), provides an input reference voltage level. The voltage reduction circuit provides another reduced version of the input reference voltage level. The PTAT circuit has first and second differential paths to provide an output reference voltage at an output node of the PTAT circuit, and a feedback path to draw feedback current from the output node to control the differential circuit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.