Amplifier arrangement having an adjustable gain, and use...

Details Amplifier arrangement having an adjustable gain, and use... Amplifier arrangement having an adjustable gain, and use...

2008-07-08

2008-07-08

Pascal, Robert J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S254000, C330S085000

Reexamination Certificate

active

07397307

ABSTRACT:
According to one or more aspects of the present invention, an amplifier arrangement is disclosed. The arrangement comprises a first, a second and a third amplifier. The first and second amplifiers are coupled to one another such that they form a negative feedback loop. In addition, an output node of the first amplifier is connected to a signal input of the third amplifier. An output node of the third amplifier circuit forms the amplifier output of the amplifier arrangement. In addition, the third amplifier circuit is designed for switchably changing its gain on the basis of a signal at an actuating input of the amplifier arrangement.

REFERENCES:
patent: 5894245 (1999-04-01), Cho
patent: 6373337 (2002-04-01), Ganser
patent: 7065336 (2006-06-01), Spiegel
patent: 7164313 (2007-01-01), Capofreddi et al.
patent: 7292099 (2007-11-01), Stöger et al.
patent: 103 44 878 (2005-04-01), None
“Noise Optimization of an Inductively Degenerated CMOS Low Noise Amplifier”, Pietro Andreani and Henrik Sjöland, IEEE Transactions on Circuits and Systems—Analog and Digital Signal Processing, vol. 48, No. 9, Sep. 2001, pp. 835-841.

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