Reference voltage circuit with low temperature drift

US10831227B2 · kind B2 · utility

Assignee

• GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI · CN

Inventors

• Yuming Feng · Tangxia, CN
• Liang Zhang · Tangxia, CN
• Xinchao Peng · Lo Wu, CN
• Yijun Xu · Hangzhou City, CN
• Jianxun Li · Singapore, SG
• Yuhua Xie · Nanhu, CN
• Shirong Fan · Tangxia, CN
• Jia-Xiu ZHOU · Tangxia, CN
• Wenjie Yang · Tangxia, CN

Key dates

• Filing date: Oct 19, 2017
• Grant date: Nov 10, 2020
• Expiry date: Oct 19, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G05F3/242
• WIPO field: Control
• WIPO sector: Instruments

Abstract

Disclosed is a reference voltage circuit with low temperature drift, including a first voltage unit, a second voltage unit and a K times' amplification unit. The first voltage unit is configured to generate a first voltage, with a first end thereof being grounded. The K times' amplification unit is configured to amplify the first voltage by K times, with a first end thereof being connected to a second end of the first voltage unit, and with a second end thereof being connected to a first end of the second voltage unit, wherein K is a constant greater than zero. The second voltage unit is configured to generate a second voltage, with the first end thereof being connected to a current source circuit, and a second end thereof being connected to a third end of the first voltage unit to serve as an output end of a reference voltage (VREF).