发明名称 |
Error amplifier with a high common mode rejection |
摘要 |
A differential amplifier provides a high common mode rejection while maintaining substantially unchanged the input dynamic range. The differential amplifier includes a comparator having inputs to which are applied the two input signals, which are also applied to an operational amplifier, so that the comparator outputs a signal whose sign is indicative of the sign of the difference between the two input signals. The output of the operational amplifier is feedback to one of the inputs of the operational amplifier through a current mirror. This feedback signal is switched between the non-inverting input of the operational amplifier and the inverting input of the operational amplifier. The switching of the feedback signal ensures negative feedback, and is dependent upon the sign of the difference detected by the comparator.
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申请公布号 |
US6169453(B1) |
申请公布日期 |
2001.01.02 |
申请号 |
US19990314048 |
申请日期 |
1999.05.18 |
申请人 |
STMICROELECTRONICS S.R.L. |
发明人 |
MILANESI ANDREA;POLETTO VANNI |
分类号 |
H03F3/45;(IPC1-7):H03F3/45 |
主分类号 |
H03F3/45 |
代理机构 |
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主权项 |
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地址 |
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