Patent · US Active

Circuit and method for generating a bandgap reference voltage

US9568933B2 · kind B2 · utility

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17Claims

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Inventors

Ansgar Pottbaecker · Grafing, DE
Panny Cai · Shanghai, CN

Key dates

Filing date	Sep 9, 2013
Grant date	Feb 14, 2017
Priority date	—
Expiry date	Apr 28, 2035

Classification

Technology area (CPC G)Physics
CPC primaryG05F3/22
WIPO fieldControl
WIPO sectorInstruments

Abstract

A bandgap reference voltage generator includes a bipolar assembly having a first resistor, a first branch and a second branch that is in parallel with the first branch. The first branch includes a first bipolar transistor with a base coupled to a fixed voltage. The second branch includes a second bipolar transistor with a base coupled to the fixed voltage and a second resistor coupled in series with the second bipolar transistor. A differential module is coupled to the first and second bipolar transistors and configured to balance the currents in the first and the second branches. The bandgap reference voltage is output at a node to which the first resistor is connected.

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