Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2006-04-03
2008-08-12
Pascal, Robert (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S300000
Reexamination Certificate
active
07411451
ABSTRACT:
An amplifier circuit includes an pair of input transistors, the drains of which are connected to emitters of first and second cascode transistors. First and second controlled current sources are connected to the emitters of the first and second cascode transistors, respectively, and third and fourth controlled current sources are connected to the collectors thereof. A bias circuit controls the 4 controlled current sources in response to the emitter voltage of a pair of input transistors of an output stage the inputs of which are connected to the drains of the first and second cascode transistors.
REFERENCES:
patent: 6542030 (2003-04-01), Huijsing et al.
patent: 6801087 (2004-10-01), Ausserlechner
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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