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公开(公告)号：EP0719474B1
公开(公告)日：1999-11-24
申请号：EP94925350.4
申请日：1994-09-07
CPC分类号： H03F3/45179 , H03F3/3008 , H03F3/45188 , H03F3/45278 , H03F3/45726 , H03F2200/153 , H03F2203/30084 , H03F2203/30087 , H03F2203/30117 , H03F2203/30156 , H03F2203/45024 , H03F2203/45192 , H03F2203/45221 , H03F2203/45268 , H03F2203/45296 , H03F2203/45398 , H03F2203/45508 , H03F2203/45732
摘要： An operational amplifier with a high input resistance and a high bandwidth particularly suitable for capacitive loads and which above all keeps its operating point within narrow limits independently of technological fluctuations uses bipolar cascodes (Q6, Q16, Q7, Q17) as output branches which are driven with high resistivity through PMOS cascode transistors (M6, M7) directly by the differential amplifier transistor pair (M4, M5). The current is thus uncoupled and the operating point of the operational amplifier is kept constant even when technological fluctuations are taken in account.
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公开(公告)号：EP0719474A1
公开(公告)日：1996-07-03
申请号：EP94925350.0
申请日：1994-09-07
IPC分类号： H03F3
CPC分类号： H03F3/45179 , H03F3/3008 , H03F3/45188 , H03F3/45278 , H03F3/45726 , H03F2200/153 , H03F2203/30084 , H03F2203/30087 , H03F2203/30117 , H03F2203/30156 , H03F2203/45024 , H03F2203/45192 , H03F2203/45221 , H03F2203/45268 , H03F2203/45296 , H03F2203/45398 , H03F2203/45508 , H03F2203/45732
摘要： An operational amplifier with a high input resistance and a high bandwidth particularly suitable for capacitive loads and which above all keeps its operating point within narrow limits independently of technological fluctuations uses bipolar cascodes (Q6, Q16, Q7, Q17) as output branches which are driven with high resistivity through PMOS cascode transistors (M6, M7) directly by the differential amplifier transistor pair (M4, M5). The current is thus uncoupled and the operating point of the operational amplifier is kept constant even when technological fluctuations are taken in account.
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