发明名称 |
Apparatus and method for a class AB output stage having a stable quiescent current and improved cross over behavior |
摘要 |
An electronic circuit for a Class AB output stage that has a differential input and a single ended output. A pair of clamp transistors are coupled between the bases of a pair of output transistors so that cross-over distortion is reduced and the output transistors do not completely turn off. A floating current source is employed to provide a stable quiescent current over a range of supply voltages. Also, the types and sizes of the transistors in the floating current source and the clamp transistors are matched so that any non-linear change in the operation of the clamp transistors caused by the Early effect over a range of supply voltages is automatically compensated for.
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申请公布号 |
US6294958(B1) |
申请公布日期 |
2001.09.25 |
申请号 |
US20000703475 |
申请日期 |
2000.10.31 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
ESCHAUZIER RUDOLPHE GUSTAVE HUBERTUS |
分类号 |
H03F1/32;H03F3/30;(IPC1-7):H03F3/26 |
主分类号 |
H03F1/32 |
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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