EMI reduction stage in a post-amplifier

Details EMI reduction stage in a post-amplifier EMI reduction stage in a post-amplifier

2007-04-05

2008-12-02

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including atomic particle or radiant energy impinging on a...

Reexamination Certificate

active

07459982

ABSTRACT:
An amplifier output stage for reducing Electromagnetic Interference (EMI) that includes an output node and an input node. A first transistor has a base terminal coupled to the input node and has a collector terminal coupled to the output node. A second transistor has a base terminal coupled to an emitter terminal of the first transistor and has a collector terminal coupled to the output node. A third transistor has a collector terminal coupled to the emitter terminal of the first transistor and the base of the second transistor and has an emitter terminal coupled to a current source and to an emitter terminal of the second transistor. A resistor has a first terminal coupled to a base terminal of the third transistor and has a second terminal coupled to the emitter terminal of the first transistor.

REFERENCES:
patent: 6727762 (2004-04-01), Kobayashi
patent: 7253689 (2007-08-01), Devendorf et al.
patent: 2008/0129380 (2008-06-01), Jin

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