Invention Grant
US07825734B2 Amplifier having an output protection, in particular operational amplifier for audio application
有权
具有输出保护的放大器，特别是用于音频应用的运算放大器
- Patent Title: Amplifier having an output protection, in particular operational amplifier for audio application
- Patent Title (中): 具有输出保护的放大器，特别是用于音频应用的运算放大器
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Application No.: US12062576Application Date: 2008-04-04
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Publication No.: US07825734B2Publication Date: 2010-11-02
- Inventor: Peter Murin , Hynek Saman
- Applicant: Peter Murin , Hynek Saman
- Applicant Address: CZ Prague
- Assignee: STMicroelectronics Design and Application s.r.o.
- Current Assignee: STMicroelectronics Design and Application s.r.o.
- Current Assignee Address: CZ Prague
- Agency: Wolf, Greenfield & Sacks, P.C.
- Agent Lisa K. Jorgenson; James H. Morris
- Priority: EP07105835 20070406
- Main IPC: H03F1/52
- IPC: H03F1/52
Abstract:
An amplifier with an output protection having an input stage defining a feedback node, an output stage connected to the feedback node and defining an output node supplying an output voltage, and a feedback stage connected between the output and the feedback nodes. A mirror stage is connected to the feedback node and has the same structure as the output stage, the mirror stage defining a reference node connected to the feedback stage for generating a reference voltage to be compared to the output voltage by the feedback stage. The feedback stage generates a current limitation signal fed to the feedback node when a difference between the output and the reference voltages is higher than a threshold.
Public/Granted literature
- US20090102561A1 AMPLIFIER HAVING AN OUTPUT PROTECTION, IN PARTICULAR OPERATIONAL AMPLIFIER FOR AUDIO APPLICATION Public/Granted day:2009-04-23
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