Temperature independent CMOS reference voltage circuit for low-voltage applications

US6919753B2 · kind B2 · utility

Assignee

• TEXAS INSTRUMENTS INCORPORATED · US

Inventors

• Jin Wang · Cupertino, US
• Wenliang Chen · Tianjin, CN

Key dates

• Filing date: Aug 25, 2003
• Grant date: Jul 19, 2005
• Expiry date: Aug 25, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F3/245
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A temperature independent CMOS reference voltage circuit includes a CMOS current mirror circuit containing first and second CMOS transistors of a first polarity. A temperature compensation circuit is coupled to the CMOS current mirror circuit, and contains a first resistor, a second resistor, and third and fourth CMOS transistors of a second polarity. The third and fourth CMOS transistors are configured to operate substantially in a subthreshold region. One of the third and fourth CMOS transistors is diode connected.