发明名称 |
Low power and high accuracy band gap voltage reference circuit |
摘要 |
A band gap voltage reference circuit includes a high accuracy band gap (BG) circuit that generates a BG voltage potential V<SUB>bgH</SUB>. A low accuracy BG circuit includes a variable resistance and outputs a BG voltage potential V<SUB>bgL </SUB>that is related to a value of the variable resistance. A calibration circuit communicates with the high and low accuracy BG circuits, adjusts the variable resistance based on a difference between the BG voltage potential V<SUB>bgH </SUB>and the BG voltage potential V<SUB>bgL</SUB>, and shuts down the high accuracy BG circuit when the BG voltage potential V<SUB>bgL </SUB>is approximately equal to the BG voltage potential V<SUB>bgH</SUB>.
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申请公布号 |
US7023194(B1) |
申请公布日期 |
2006.04.04 |
申请号 |
US20040926185 |
申请日期 |
2004.08.25 |
申请人 |
MARVELL INTERNATIONAL LTD. |
发明人 |
SUTARDJA SEHAT;ZHANG JIANCHENG |
分类号 |
G05F3/16;G05F3/30 |
主分类号 |
G05F3/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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