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公开(公告)号：EP0138261A2
公开(公告)日：1985-04-24
申请号：EP84201373.2
申请日：1984-09-25
发明人： Hague, Yusuf , Ofner, Erwin
CPC分类号： H03F3/45654 , H03F1/086 , H03F3/45192 , H03F3/45659 , H03F2200/153 , H03F2203/45424 , H03F2203/45651
摘要： A differential operational amplifier is provided with a feedback loop which continuously adjusts the common mode voltage level of the amplifier so that it lies in the center of the dynamic range of the amplifier. The feedback loop measures the instantaneous common mode voltage level and compares it with a reference voltage which is set to reflect the desired common mode voltage. An error signal is generated and fed back into the amplifier to adjust the instantaneous common mode voltage level towards the reference level. Frequency compensation is also provided to overcome the phase shift introduced by the use of RC networks.
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公开(公告)号：EP0138261A3
公开(公告)日：1987-06-16
申请号：EP84201373
申请日：1984-09-25
发明人： Hague, Yusuf , Ofner, Erwin
CPC分类号： H03F3/45654 , H03F1/086 , H03F3/45192 , H03F3/45659 , H03F2200/153 , H03F2203/45424 , H03F2203/45651
摘要： A differential operational amplifier is provided with a feedback loop which continuously adjusts the common mode voltage level of the amplifier so that it lies in the center of the dynamic range of the amplifier. The feedback loop measures the instantaneous common mode voltage level and compares it with a reference voltage which is set to reflect the desired common mode voltage. An error signal is generated and fed back into the amplifier to adjust the instantaneous common mode voltage level towards the reference level. Frequency compensation is also provided to overcome the phase shift introduced by the use of RC networks.
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