发明名称 |
Bias current cancellation for differential amplifiers |
摘要 |
Differential amplifiers are provided that substantially cancel the input bias currents at the inputs to the differential amplifiers. A circuit produces a compensation current that is substantially equal in magnitude but opposite in polarity to input bias currents associated with the first and second inputs of the differential amplifier. A further pair of transistors are used to replicate the compensation current, and to provide replicated compensation currents to the inputs of the differential amplifier, thereby substantially canceling the input bias currents at the inputs.
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申请公布号 |
US2005270100(A1) |
申请公布日期 |
2005.12.08 |
申请号 |
US20040858702 |
申请日期 |
2004.06.02 |
申请人 |
ELANTEC SEMICONDUCTOR, INC. |
发明人 |
HARVEY BARRY |
分类号 |
H03F1/56;H03F3/45;(IPC1-7):H03F3/45 |
主分类号 |
H03F1/56 |
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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