发明名称 |
Band-gap reference voltage generator |
摘要 |
<p>A band-gap reference voltage generator comprises an operational amplifier (2) comprising a first input and a second input, the first input being coupled to a first feedback network (4) and the second input being coupled to a second feedback network (6) both coupled to an output (7) of the operational amplifier providing a reference voltage, the first feedback network containing an emitter-base junction of first bipolar junction transistor means (Q1) and the second feedback network containing an emitter-base junction of second bipolar junction transistor means (Q2), and current supplying means (11) for supplying a bias current to the operational amplifier, the current supplying means being deactivatable in a substantially zero power consumption operating condition for turning the reference voltage generator off, characterized by comprising start-up circuit means (13) activated upon start-up of the reference voltage generator for a fixed, prescribed time interval for forcing a start-up current to flow through the first bipolar junction transistor means (Q1). <IMAGE></p> |
申请公布号 |
EP0840193(A1) |
申请公布日期 |
1998.05.06 |
申请号 |
EP19960830561 |
申请日期 |
1996.11.04 |
申请人 |
STMICROELECTRONICS S.R.L. |
发明人 |
MACCARRONE, MARCO;ZAMMATTIO, MATTEO;COMMODARO, STEFANO |
分类号 |
G05F3/26;G05F3/30;(IPC1-7):G05F3/26 |
主分类号 |
G05F3/26 |
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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