Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2009-07-08
2010-11-02
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S302000, C330S255000, C330S257000
Reexamination Certificate
active
07825727
ABSTRACT:
An input stage of a differential amplifier includes a differential pair formed by an N-channel MOS transistor MN1having a gate connected to an INM and an N-channel MOS transistor MN2having a gate connected to an INP, both having sources connected to each other, a constant current source connected to the sources of the MN1and MN2,and a variable current source connected to the sources of the MN1and MN2.A subsequent-stage processing circuit having an intermediate stage and an output stage includes a phase compensation capacitor and outputs an output responsive to a change in the differential inputs by charging and discharging the phase compensation capacitor through the constant current source. The variable current source turns ON when the change reaches a level causing a parasitic capacitor at the sources of the differential pair to be discharged, and supplies a current for discharging the parasitic capacitor.
REFERENCES:
patent: 4516082 (1985-05-01), Smith et al.
patent: 5399992 (1995-03-01), Itakura et al.
patent: 6100762 (2000-08-01), Kato
patent: 6424585 (2002-07-01), Ooishi
patent: 6429700 (2002-08-01), Yang
patent: 6970043 (2005-11-01), Pradhan et al.
patent: 3550016 (2006-04-01), None
McGinn IP Law Group PLLC
NEC Electronics Corporation
Nguyen Patricia
LandOfFree
Differential amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Differential amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4235946