Method and low voltage CMOS circuit for generating voltage and current references

US6859092B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Eric John Lukes · Stewartville, US
• Patrick L. Rosno · Rochester, US
• James D. Strom · Rochester, US
• Dana Marie Woeste · Mantorville, US

Key dates

• Filing date: Apr 17, 2003
• Grant date: Feb 22, 2005
• Expiry date: Apr 17, 2023

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F1/46
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method and a low voltage, complementary metal oxide semiconductor (CMOS) circuit are provided for generating voltage and current references with a low voltage power supply. A voltage generating circuit provides a voltage reference and is formed by a plurality of CMOS transistors and a resistor. An operational amplifier includes a differential pair of CMOS transistors. The first voltage reference is applied to an input of the differential pair of transistors and an output of the differential pair of transistors providing a second voltage reference. The operational amplifier includes a plurality of current reference transistors. A first voltage generating circuit generates a first voltage and a second voltage generating circuit generating a second voltage. The first and second voltage generating circuits are formed by a plurality of CMOS transistors. The generated first and second voltages are applied to the voltage reference generating circuit and current reference transistors.