发明名称 |
Output stage especially for integrated amplifiers with externally connected output power devices. |
摘要 |
The operation of externally connected output power transistors of a class AB amplifier is controlled without employing any external sensing resistance of the output current by driving an externally connected power transistor through a level shifting buffer and employing a limiting network composed of an integrated transistor driven by the output of a signal amplifying stage and a resistance connected in series with its drain. The buffer stage shifts the level of the driving signal of the external power transistor by a value equal to the threshold voltage of the integrated transistor of the limiting network thus ensuring the turn-off of the external power transistor under quiescent conditions. <IMAGE> |
申请公布号 |
EP0669709(A1) |
申请公布日期 |
1995.08.30 |
申请号 |
EP19940830090 |
申请日期 |
1994.02.28 |
申请人 |
STMICROELECTRONICS S.R.L. |
发明人 |
CHRAPPAN, FRANCESCO;NESSI, MAURIZIO;SALINA, ALBERTO |
分类号 |
H03F3/20;H02P25/02;H03F1/32;H03F3/30;H03F3/347 |
主分类号 |
H03F3/20 |
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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