Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2006-04-12
2008-12-30
Pascal, Robert (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S255000
Reexamination Certificate
active
07471150
ABSTRACT:
A class AB folded cascode circuit includes a differential current follower having first and second cascode transistors with emitters connected to first and second input conductors. An input of a first current mirror is coupled to the first input conductor, and an input of a second current mirror is coupled to the second input conductor. Outputs of the second and first current mirrors are coupled to collectors of the first and second cascode transistors, respectively, and also to first and second outputs, respectively, of the differential current follower. A third current mirror converts a differential output current in the first and second output conductors to a corresponding single-ended output voltage on the second output conductor.
REFERENCES:
patent: 6788146 (2004-09-01), Forejt et al.
Alenin Sergey V.
Surtihadi Henry
Brady III Wade J.
Franz Warren L.
Nguyen Hieu P
Pascal Robert
Telecky , Jr. Frederick J.
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