Methods and apparatus for reducing output current...

Details Methods and apparatus for reducing output current... Methods and apparatus for reducing output current...

2007-05-22

2007-05-22

Nguyen, Khanh Van (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including protection means

C330S283000, C330S296000

Reexamination Certificate

active

11147795

ABSTRACT:
In one embodiment, a method is provided for reducing output current oscillations of a driver provided with i) a current sensing circuit that senses excessive current draws of an output stage of the driver, and ii) a feedback control circuit that reduces the excessive current draws. In accordance with the method, an output of the current sensing circuit is coupled to an input of a common source amplifier with source degeneration. The output of the common source amplifier is coupled to a node between an input stage and an amplification stage of the driver. The common source amplifier is configured to be activated when the current sensing circuit senses an excessive current draw of the output stage, at which time the feedback control circuit is also activated. Related apparatus is also disclosed.

REFERENCES:
patent: 4755741 (1988-07-01), Nelson
patent: 5397978 (1995-03-01), Parry et al.
patent: 6563385 (2003-05-01), Wojslaw
patent: 0 639 894 (1995-02-01), None
patent: 0 647 026 (1996-01-01), None
patent: 0 730 347 (1996-10-01), None

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