High speed amplifier with controllable amplification and...

Details High speed amplifier with controllable amplification and... High speed amplifier with controllable amplification and...

2007-04-05

2010-06-22

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S254000, C330S310000, C330S144000

Reexamination Certificate

active

07741908

ABSTRACT:
In an amplifier including first and second power supply terminals, first and second output terminals, a first load connected between the first power supply terminal and the first output terminal, a second load connected between the first power supply terminal and the second output terminal, a constant current source connected to the second power supply terminal, a first transistor connected between the first output terminal and the constant current source, a control terminal of the first transistor being adapted to receive an input voltage, and a second transistor connected between the second output terminal and the constant current source, a control terminal of the second transistor being adapted to receive a reference voltage, an amplification and output impedance switching circuit is connected between the first and second output terminals, so that the amplifier and output impedance switching circuit controls an amplification and output impedance of the amplifier in accordance with a control signal.

REFERENCES:
patent: 3845404 (1974-10-01), Trilling
patent: 4054849 (1977-10-01), Yamada
patent: 4599574 (1986-07-01), Chambers
patent: 5142242 (1992-08-01), Schaffer
patent: 5337230 (1994-08-01), Baumgartner et al.
patent: 5872475 (1999-02-01), Otaka
patent: 6313779 (2001-11-01), Leung et al.
patent: 6448813 (2002-09-01), Garlepp et al.
patent: 7468688 (2008-12-01), Hesener
patent: 10-200385 (1998-07-01), None

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