Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2008-01-22
2008-01-22
Pascal, Robert (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
Reexamination Certificate
active
10908553
ABSTRACT:
A current-matching variable gain amplifier is provided. The amplifier comprises a reference current source, at least one cascode amplifier, a matching circuit, a control circuit, and at least one first blocking circuit. The reference current source provides a reference current. Each of the cascode amplifiers amplifies an input signal according to the reference current. The matching circuit equalizes the voltage level at a first node in each cascode amplifier and the voltage level at a second node in the matching circuit. The matching circuit also equalizes the current of a main MOSFET of each cascode amplifier and the current of a first MOSFET of the matching circuit. The control circuit controls the current of the first MOSFET of the matching circuit. Each of the first blocking circuit(s) corresponds with the cascode amplifier, and is coupled between the reference current source and the corresponding cascode amplifier, for blocking RF signals.
REFERENCES:
patent: 5661437 (1997-08-01), Nishikawa et al.
patent: 6104246 (2000-08-01), LaFerrara et al.
patent: 6127886 (2000-10-01), Khabbaz et al.
patent: 6211737 (2001-04-01), Fong
patent: 6292032 (2001-09-01), Hirabayashi et al.
patent: 6400227 (2002-06-01), Goldfarb et al.
patent: 6583668 (2003-06-01), Liu et al.
patent: 6586993 (2003-07-01), Macedo
patent: 6724257 (2004-04-01), Wrathall
patent: 6731171 (2004-05-01), Yamashita
patent: 6737841 (2004-05-01), Wrathall
patent: 6753730 (2004-06-01), Yamamoto
patent: 6977552 (2005-12-01), Macedo
patent: 7120411 (2006-10-01), Darabi
patent: 7126427 (2006-10-01), Aoki
patent: 2003/0181181 (2003-09-01), Darabi
patent: 2006/0119435 (2006-06-01), Oh et al.
Flanagan Krista M
Integrated System Solution Corp.
Jianq Chyun IP Office
Pascal Robert
LandOfFree
Current-matching variable gain amplifier does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current-matching variable gain amplifier, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current-matching variable gain amplifier will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3958741