Amplifiers – With semiconductor amplifying device – Including push-pull amplifier
Reexamination Certificate
2008-07-01
2008-07-01
Nguyen, Khanh V (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including push-pull amplifier
C330S263000
Reexamination Certificate
active
07394316
ABSTRACT:
An amplifying circuit which may be useful in a diamond buffer amplifier or operational amplifier includes an input transistor including an emitter, a collector, and a base coupled to receive an input voltage. An adjustable current source circuit is coupled between a first reference voltage and the emitter of the input transistor. A current source is coupled between a second reference voltage and the collector of the input transistor. An isolation resistor has a first terminal coupled to an output terminal of the adjustable current source circuit and a second terminal coupled to the emitter of the input transistor. A current follower circuit is coupled between the collector of the input transistor and an input terminal of the adjustable current source circuit. A feed-forward capacitor is coupled between the collector of the input transistor and the first terminal of the isolation resistor.
REFERENCES:
patent: 7078973 (2006-07-01), Alenin
patent: 7102440 (2006-09-01), Damitio et al.
Alenin Sergey
Surtihadi Henry
Brady III Wade J.
Nguyen Khanh V
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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