发明名称 |
Rail-to-rail operational amplifier circuits to extract the mean (common mode) voltage of two input signals |
摘要 |
A rail-to-rail operational amplifier to extract a true mean of two signals. The amplifier includes a first amplifier input stage adapted to operate when a mean of the two signals is near an upper rail voltage. A second amplifier input stage is adapted to operate when the mean of the two signals is near a lower rail voltage. A transitioning circuit is adapted to control how much each of the first and the second amplifier input stages contributes to an input of a high-gain amplifier output stage. An output of the high-gain amplifier output stage is fed back to both the n-type amplifier input stage and the p-type amplifier input stage via a matched buffer stage.
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申请公布号 |
US2004207449(A1) |
申请公布日期 |
2004.10.21 |
申请号 |
US20030733710 |
申请日期 |
2003.12.11 |
申请人 |
ELANTEC SEMICONDUCTOR, INC. |
发明人 |
MOLE PETER J. |
分类号 |
H03F3/45;(IPC1-7):H03L5/00 |
主分类号 |
H03F3/45 |
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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