Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2008-11-26
2010-06-08
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S302000, C330S310000
Reexamination Certificate
active
07733180
ABSTRACT:
An apparatus having a zero-pole that is dependant on an equivalent series resistance (ESR) and a load is provided. The apparatus comprises an amplifier stage that receives a first input voltage and a bias voltage, an intermediate stage that is coupled to the output node of the amplifier stage (where the intermediate stage outputs an intermediate voltage to an intermediate node), a first capacitor coupled between at least one of the internal transistors at an internal node and the intermediate node, a power transistor coupled between a second input voltage and the intermediate node, a second capacitor coupled between the internal node and the power transistor, and a feedback stage coupled to the intermediate node and to the amplifier stage. The amplifier stage also has an output node and includes a plurality of internal transistors. The second capacitor provides a third input voltage to the power transistor, and the ratio of the capacitance of the first capacitor to the capacitance of the second capacitor controls the position of the zero-pole. Additionally, the feedback stage is adapted to output an output voltage to a load, and wherein the feedback stage provides a feedback voltage to the amplifier stage.
REFERENCES:
patent: 5631598 (1997-05-01), Miranda et al.
patent: 6246221 (2001-06-01), Xi
patent: 6259238 (2001-07-01), Hastings
patent: 6300749 (2001-10-01), Castelli et al.
patent: 6373233 (2002-04-01), Bakker et al.
patent: 6518737 (2003-02-01), Stanescu et al.
patent: 6700360 (2004-03-01), Biagi et al.
patent: 6960907 (2005-11-01), Poss
patent: 6977490 (2005-12-01), Zhang et al.
patent: 7235959 (2007-06-01), Sicard
patent: 7432693 (2008-10-01), Enjalbert
patent: 7589507 (2009-09-01), Mandal
patent: 2007/0188228 (2007-08-01), Renous
patent: 2007/0241731 (2007-10-01), Van Ettinger
Gakhar Vikram
Tadeparthy Preetam Charan Anand
Brady III Wade J.
Nguyen Patricia
Patti John J.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
LandOfFree
Amplifier for driving external capacitive loads does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Amplifier for driving external capacitive loads, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplifier for driving external capacitive loads will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4202594