发明名称 |
Electronic device and method for generating a curvature compensated bandgap reference voltage |
摘要 |
The invention relates to an electronic device with a bandgap reference generator including a first path with series connection of a first bipolar transistor, a first resistor and a second resistor, and a second path with series connection of a second bipolar transistor and a third resistor. The first and second paths are supplied current via a common node through a fourth resistor controlled by an amplifier sensing voltage drops within the first and second paths. A curvature compensation stage compensates for a variation of base emitter voltage of the bipolar transistors by drawing a compensation current from the common resistor node. |
申请公布号 |
US9372496(B2) |
申请公布日期 |
2016.06.21 |
申请号 |
US201514811896 |
申请日期 |
2015.07.29 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
Arnold Matthias |
分类号 |
G05F3/16;G05F3/26;G05F3/30 |
主分类号 |
G05F3/16 |
代理机构 |
|
代理人 |
Marshall, Jr. Robert D.;Cimino Frank D. |
主权项 |
1. A method of generating a reference voltage comprising the steps of:
generating a controlled current with a feedback loop comparing voltage drops in a first path including a first bipolar transistor and a second path parallel to the first path including a second bipolar transistor; generating a non-linear compensation current for compensating a temperature dependent variation of a voltage drop across said first and second paths; supplying the controlled current to a common node of the first path and the second path; and drawing the compensation current from the common node thereby generating a voltage drop across a resistor carrying the controlled current with a positive temperature coefficient. |
地址 |
Dallas TX US |